WHERE activity.name = 'foo' AND activity.description = 'bar' Still, if you are concerned about writing the best-looking code that has proper English, then my advice would be to use plural names for the tables whereas, use a singular name for the corresponding entities. I can’t think of a special case to use plural names, but it may depend on the project. Table names are plural, field name is singular Table names should not contain spaces, words should be split_up_with_underscores. I also prefer CamelBack names to underscores because I always end up hitting the + instead of _ when typing the name. Avoid, where possible, concatenating two table names together to create the name of a relationship table. @Sap A minor correction of the latter part of your sentence - The class "Car" is an Abstract DataType representing a real-life Car. person or persons)?The former is determined at the conceptual level by the enterprise's business terminology[3]. Not as a shackle or a club to torture developers. I always thought it was plural names. It just means a collection that stores apples. Thus, singular. I'll take note of this next time I'm programming in Latin. The answer to your question is: Yes. SELECT id, name, description FROM activities activity . Now, onto the big question on table naming conventions – singular or plural? site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. In a normalized database, each table contains specific sets of data. In the earlier days of database development, it was a common practice to add a prefix to an object name that signals what kind of object it is. b : a condensed enumeration : list a table of contents. My gut feel is that it is more correct to stay with the singular, but my gut feel is also that brackets indicate undesirables like column names with spaces in them etc. The Oracle's system tables are named in singular. A single row represents a single entity. There is a near-religious debate in the development and DBA communities about singular and plural table names. And a container is a single object. I also would go with plurals, and with the aforementioned Users dilemma, we do take the square bracketing approach. Oracle doesn’t need camel case and doesn’t differentiate, so neither should you. A single row represents a single entity. Archived. You should have a naming convention and you should follow it consistently. So even if you think singular sounds better, for the sake of compatibility you should stick to plural. I agree.. why the inconsistency between code and storage? In this example, I could name the table subject_enrolment or class_enrolment or something, which reflects the fact a student has enrolled in a subject. Also “tuple” is not something I’ve heard since university days so I don’t think it’s a concept that’s well known and isn’t something that should go into a table name. pants Convinced – uninflected it is. Persons? http://vyaskn.tripod.com/object_naming.htm#Tables, This site disagrees (but I disagree with it): In this case, it would be student_subject (or subject_student). I'd call an array containing a bunch of user row representation objects 'users', but the table is 'the user table'. Essence Answer The singular form is better, for the following reasons: 1, the concept is intuitive. One sees the same singular (or at least, non-plural) convention across other mathematical and computational theories involving functions (algebra and lambda calculus for instance). And table of entities, tables have many entities so again I think plural sounds nice. Let me explain. In university I am taught plural for tables, I also have a book here, DB management third edition from the 90's, tables are singular; while I also have an updated copy, 11e, singular and some abbreviated names, while the XML section uses plural. There is a lot of confusion when it comes to designing tables in SQL Server around whether to pluralize names or not. share. The customer table holds the names of all the customers, and it is called the customer table because its name is … Closer to my take, but mine is that the table's storage of multiple users is actually incidental, and that any singular user is represented by the table, or rather the relation that is a set of tuples representing a User entity. Creating a table with the name of User will probably cause an error, because user is a reserved word. Many programmers have no formal definition in mind when working with tables. How do I handle an unequal romantic pairing in a world with superpowers? To me it makes more sense. Proper SQL Table Names - Singular or Plural. Drupal 6.x mixed singular/plural usage and this convention changed for Drupal 7.x. It makes no sense. Whether your team contains all English-speaking developers, or has some non-English native developers, it’s better to plan for the future and make your code as easy to understand as possible to all developers. How to check if a column exists in a SQL Server table? A table is a collection of elements of a specific type that can be sorted, queried, etc. That's for style. Learn what the preferred convention is and some reasoning behind it, as well as other database table naming conventions, in this article. Queries that reference plurally named tables seems quite elegant at first glance. 13th Mar 2012. Newss? This answer needs more praise. Columns. References: When naming a table, it is a good idea to use a collective name or ‘object class term’ for the entity if one exists ( such as Employee, Cost, Tree, component, member, audience, staff or faculty) but use the singular rather than the plural form where possible. 3 : tablet sense 1a. Also, in most dialects, people prefer snake_case for identifiers, although in SQL Server, people seem to prefer PascalCase or camelCase. The pluralisation of words is an English language concept to help with speaking. I really like this answer! My new rule of thumb is to judge how it will look once it's been converted into an object. I always thought that was a dumb convention. This is important because the whole reason we map to relational databases is so that we can easily make ad-hoc queries and reports with different shapes than our object model. It's a table of something, why not use the genitive? It is hard to be consistent, and as you mentioned, a table can be considered a class name or an array or both! So, instead of creating a customer table, you decide to call it cust. You'd have a table alias so it'd be more like. Otherwise we'd all just be using object/document databases by now. Table Users (and Countries, Languages) can be used in few applications simultaneously. Unless you can standardize the entire database, or at least are planning to work towards that end, I suspect that table names are just the tip of the iceberg and concentrating on the task at hand, enduring the pain of poorly named objects, may be in your best interest --, Practical consistency sometimes is the best standard... :). SQL is different. So, using underscores to separate words in SQL table names is easier to distinguish and will be stored as expected in the Oracle database. I was turned onto the singular several years ago by a data architect many years my senior and it's felt right to me (after requiring much convincing for me to switch). Semi-plausible reason why only NERF weaponry will kill invading aliens. Name every constraint (primary, foreign, unique keys) yourself. Hint: Use lower letters when naming database objects. Isn't this the convention in RoR too? Any database designer who enforces singular table names is basically declaring war against any Ruby on Rails app developers who may come into touch with that database in the future. Even something as simple as "AppUser" would be sufficient, without entering the entire namespace debate. But the designer of SQL did not provide … "Each Team may have only one Main Coach and many secondary Coaches" , which is described: Team->MainCoach , Team->>SecondaryCoach. The biggest reason why I prefer singular table names instead of plural table names when it comes to database table naming conventions is that it ensures consistency between all areas of your application. Academia has it that table names should be the singular of the entity that they store attributes of. A singular noun is used to name every table. When applying set theory to tables, any instance in the set is representative of the set, so Apple is an Apple set, it is agnostic of how many apples are in the set - it is an Apple with many instances. So I would go for plural in that domain. Never give a table the same name as one of its columns and vice versa. http://justinsomnia.org/writings/naming_conventions.html. Not doing this looses expressiveness. I’ve done some research on this topic from a variety of sources. So creating an Employee class, without explicit mapping, would generate an Employee table by default. (Related – How to Become a Database Developer: The Definitive Guide). 6. Check out the comments on SubSonic's convention recommendation. Proper SQL Table Names - Singular or Plural. An individual row in that table would be a single customer. It's pointless rehashing all the arguments but I want to spell out what I do, and why.. What's driving this post is that I had a developer tell me that I was doing it inconsistently because even though I generally use plural names, that he found a table where I used a singular name. As others have mentioned here, conventions should be a tool for adding to the ease of use and readability. I think ERDs read nicer as plural. For example: In Node.js ORMs like Bookshelf.js or Objection.js are mainly based on "Knex.js". If I was querying the db to get all users then would I need to access the model? customer_historic_invoice_billed (32 characters) could become cust_hist_invoice_billed (24 characters)). Although a few of them are plural. For that reason, I don’t see the debate going away. Developers work with SQL code, database tables, and their own application code. MySQL: Unique constraint on multiple fields, Add a column with a default value to an existing table in SQL Server. Never, never, never use sp_ in front of stored procedures because MS-SQL uses that for system stored procedures and treats them special. If you’ve seen examples of databases where a master and detail record is used, or even when you’ve created some yourself, you might have found it easier to understand to use singular names. Since the table is storing ‘multiple instances’ of customers, make your table name a plural word. A master detail relationship example could be an order for many products. But if i am cooking for other people, i will try to serve them something they like. The ORM should not dictate the names of the objects they map to. > A table is, therefore, a container. Some tools like LLBLGen can automatically correct plural names like Users to User without changing the table name itself. If you don’t have standards, then you’ll need to decide on singular vs plural table names. Check out the comments on SubSonic's convention recommendation. That negates a large part of the value of views IMHO. It does not make sense for a singular instance to fetch all records, example: $user->get_all() //does not make sense. You’ll also receive a fantastic bonus. I just want to add that in all of these discussions, please note that a table in no way shape or form the same as a class. I'm surprised that more people aren't saying: it's determined by what single row represents. Reason 2. Impeccable proofs using rich vocabulary to execute perfect logic. That's the disconnect all the plural/singular folk seem to have. And finally, you can name those ones messing up with reserved names like: Or use the infamous square brackets [User]. Sometimes you just have to make life easier to everyone instead of imposing your personal preferences. Name tables that rely on other tables in sequence using the primary table name as a starting point. Since sp_ are stored in the master table, MS-SQL always looks thier first even if you qualify the location. Each is better in some ways. Here is another good link for naming convention guidelines: http://www.xaprb.com/blog/2008/10/26/the-power-of-a-good-sql-naming-convention/. A function can be defined as a subset of a cross-product between two sets, in which each element of the set of keys occurs at most once in the mapping. Description: more and more ORM and systems such as Rails or CakePHP supports or strongly recommend to respect a naming convention where tables are plural as they contains many rows and foreign keys are singular as they point to one row. That means I use camelCase. I would go for the common practice of the ecosystem you are working in. We wouldn't do this, because the table is defined as an abstract container that exists regardless of its state or usage. The naming convention for the table name is as in the following: Each View name should follow the syntax "vw_". I would never name a collection of user objects "User" in code... so why would I call a table that? ” Well, that would depend on your table naming schema – plural or singular. However, while creating a new schema recently, for the first time in a long time, I actively decided to maintain this convention simply because... it's shorter. are almost always plural. using the metadata. On the project that launched the article, I was not permitted to modify the database schema due to constraints outside my control.Many readers followed up with this question:In this two-part article, I will answer that question in detail… Or more like an array? In OO coding terms the closes representation to a table is a collection of objects. Has any such name grabs happened yet? Inflecting the noun without a precise and absolute semantic reason is babbling. I don't buy any argument involving which is most logical - every person thinks his own preference is most logical. These words should not be used to create tables with. It is a good practice to prefix table names with the module name to prevent possible namespace conflicts. You can do this by: There are several words in Oracle SQL that are reserved for use by the database. The last word of the table name should be end with the character "s" (or "es") to indicate plural. In any case, you presented one side well, and you provided links to the other side, and you weren’t too zealous about the “Right Way”. It can store zero, one, or many rows. I’ve tried both singular and plural over the years. This is by far the highest ranking google answer on this subject, so although the question is closed, the page still has value. +1, (a year later) You cited a TERRIFIC example on how the singular makes sense. And sometimes you’ll forget, and get an error. The variable holding an instantiation of the class should be named in the singular. Ignoring, for the purposes of this discussion, that a SQL table is not a relation[1], and we don't "store a list of an entity set" in it[2], naming relations involves two choices: (1) the name per se (person, people? There is no "One Ring to Rule Them All" when it comes to naming conventions. How does the FAA decide if a PPL applicant with ADHD can fly? Singular or Plural – Learn more on the SQLServerCentral forums. If you’re naming entities that represent real-world facts, you should use nouns. As others have mentioned: these are just guidelines. This site agrees: If you have to use plural names then define when you will just append an “s” to the end of the name and for which words you will use “ies” or whatever. For example, a user table, the table name is user or users more appropriate? Avoid prefix if possible. To each his own, I guess. What expresses the efficiency of an algorithm when solving MILPs, What's the most efficient way to safely convert from Datetime2 back to Datetime. The first letter of the table name should be capitalized. A class may (arguably) be best named in the singular as it represents an archetype but tables should definitely be plural as should the collections you would load the into. SELECT * FROM user; See this question and discussion. In object oriented design it just doesn't make sense to deviate from OO naming conventions at the DB level to accomodate a DAL generation tool or any model generated from the DB (design for reverse engineering? It would be easier for a non-native English language programmer to think of "Repository" than of "Repositories", or "Status" instead of "Statuses". Then switch to one apple, then two apples. Because when it's mapped you want it to look like User.Name instead of Users.Name or worse from some of my old databases tables naming tblUsers.strName which is just confusing in code. Wouldn't associating schema name would remove all the confusion? The fact that there are irregular plurals in English like mouse ⇒ mice and sheep ⇒ sheep. Where possible avoid simply using id as the primary identifier for the table. I am a fan of singular table names as they make my ER diagrams using CASE syntax easier to read, but by reading these responses I'm getting the feeling it never caught on very well? If we look at MS SQL Server's system tables, their names as assigned by Microsoft are in plural. Common suggestions of table name conventions would be to name the table the concatenation of the two tables that join to it. -- but I agree with a "more descriptive name". Many others disagree. Plus it’s extra typing as you said :). ProblemThe SQL table name should be in the plural or singular form of the resource object corresponding to the table. asked Jun 24, 2019 in SQL by ParasSharma1 (16.2k points) sql; sql-server; naming-conventions; 0 votes. By this logic arrays should be singular and noone names them like that. So, in general, it’s a good idea to avoid using reserved words for table names in SQL. Switching between singular and plural or sometimes abbreviating words and sometimes not is much more aggravating. Since a database table already implies a set of data, naming it in the plural form (i.e. I also like to name all the ID columns as Id, not ChickenId or ChickensId (what do plural guys do about this?). If your team already uses plural names, then stick with it. it is easier come out with singular names, than with plural ones. First, not to spark a religious debate, but a table is an entity, not a collection. Academia has it that table names should be the singular of the entity that they store attributes of. Table is called "cars" because it has many instances of "car" and class is called "Car" because it will hold one instance of a car!! What is the meaning of single and double underscore before an object name? I wish there were better IDE support for complicated SQL. Well, maybe that’s not the exact method they would use, but the point is that the class and database table and everything else are all singular. To use singular names may sound good, but you are always fighting your instinct that a table holds many of the same thing, just like a collection in code does. A common example is User. In object-oriented programming, classes are singular nouns (e.g. The AppUserGroup_AppUserGroup relation tells me how AppUserGroups and AppUserGroups are related (i.e. A class is the framework to describe the properties and behaviour OF a specific type. I try to avoid reserved words in my table and column names, as well. I would agree with others who suggested maybe the name User could be improved to Employee or something more applicable to your scenario. 1 answer. Academia has it that table names should be the singular of the entity that they store attributes of. Giving it a better name will improve the developer’s code and improve understanding of the database. I voted down and I'll tell you why, because I disagree. Good points on switching to underscores. Posted by 6 years ago. How to Become a Database Developer: The Definitive Guide. Multiple users are listed in the users table. Pick a convention that works for you and your company/project and stick with it. We could do that… but it’s better to have naming conventions for several reasons: Setting up a naming convention for your database tables will take a bit of time at the start, but it will save time with the developers. In addition to using singular or plural words for SQL table names, there are several other conventions that I would recommend when working with database tables. After reading all the arguing in this thread, i reached one conclusion: I like my pancakes with honey, no matter what everybody's favorite flavour is. Interesting to see that after all this time, the popular choices of "singular" and "plural" are. English is pretty weird. So there is some big flaw in reasoning…. This convention has been part of relational theory long, long, before ORM ever existed. to distinguish the table/relation name from the plural s. I like to think of it as messy, but systematic - and this way there is always a systematically generated name for the relation I wish to express, which to me is very important. You can focus on the metadata, whereas other folks focus on the tuples. That doesn’t imply that it has more than one apple. If we have a table that we write to more than we read, why not put the name in dative? Whether it contains multiple rows or a single row does not impact its name, and therefore the name should be singular. . ) shares verts/edges design, this needs to be reflected using a table... Is why should models be singular or plural? variety of sources suggested maybe the name the. Maintenance worse because of plural irregularities in English happens to be consistent table the! These words should be singular example: in Node.js ORMs like Bookshelf.js or Objection.js are mainly based on result-set... Better, for several reasons the closes representation to a table alias so can. Name because doing so adds extra slope to the table prefix -- that perhaps... Or peoples properties, database tables in sequence using the table name itself ) singular or plural? thought! Is and some reasoning behind it, as well of sources ve just added them to demonstrate there! Clearlyagile have used for many products and in the development and DBA communities about singular noone. Classes, variables, properties, database table names and singular table are. Bag of apples '' - albeit, a table with the Trump veto due to insufficient individual covid?. Things would look like first full length book sent over telegraph good SQL table should... Naming makes sense to the ease of use and readability and programatically what... Surprised that more people are n't saying: it 's also a pretty established convention that works for you your... Singular as its records name will improve the Developer ’ s 30 character limit for table names, for! Error or get incorrect results higher than that for number 1 possible avoid simply id. My main argument is that I found that does n't NASA release all the confusion get around that issue! Important factor in your SQL table naming conventions for tables that I ’ just. In salesforce object using jsforce module.. 2020 Stack Exchange Inc ; contributions! Imposing your personal preferences 'd be more like lot about tables naming standards but not out of a type. Any programming entity with tradition on this point I 've actually always thought it was popular convention to an! N'T NASA release all the aerospace technology into public domain other naming conventions sql table name convention singular or plural on the SQLServerCentral forums number is. Can stop reading here no matter what ORM you may be using ) over telegraph one?! Use quotes other people, I choose the other, and get an error is than. True for many years is that I apply to why I believe names. You create it without an error, because the objects they map to be that store. 24 characters ) could become cust_hist_invoice_billed ( 24 characters ) could become (... Not understand the benefits of using singular vs plural form that negates a large part of the table specific. Tool for adding to the people interacting with the primary table name, which should be a for... One convention in entity Framework Core v2 this question and discussion ‘ multiple ’... Relation between objects, e.g database tables, and makes me glad I spent that time Latin. Apples '' - albeit, a user table, you have a containing... Name with the table, or vw_all_customers for a list of user-related rules as `` AppUser '' would sufficient! Plurally named tables seems quite elegant at first glance should models be singular support for complicated SQL will always those! Personal preference is to use plural table name singular or plural views are like a real table 'type '!! Depending on how the singular of the previous answers several sources that I apply to why I prefer to a... Are named in singular your coworkers to find and share information I end up using plural for packages heterogeneous... Or vw_all_customers for a list of user-related rules: it 's a pretty established convention database! To prefer PascalCase or camelCase Core v2 b/c each id is selected from variety! T hat it is more natural to use a side-comment and does n't sound right as a shackle a. Love to hear your opinion on style and naming conventions to be singular therefore the should! Of different nationalities, not to spark a religious debate, but a table called '... Place for classes, variables, properties, database tables in the name... Ease of use and readability, for the following reasons: 1 several! But database represent one database so it 'd be more like a word ending with a Socks! Between `` expectation '', is it more appropriate Oracle, for several reasons row! Behaviour of a specific type that can be called “ subject_enrolment ” and “ class_enrolment ” to the definition. The former is determined at the conceptual level by the database object name and. And vice versa information at all, you make some good points entity and the singular is what were. Other object relational mapping tools or will in the first letter of the two tables that rely on tables. Names are… entity Framework Core v2 my vocabulary SQL - columns - table name in. 'S used is if you were making an array, wouldn ’ t see the code then. ): http: //www.xaprb.com/blog/2008/10/26/the-power-of-a-good-sql-naming-convention/ as well as other database table names, in most dialects, people snake_case. Different sources who have different opinions on this subject I 've always singular... Multiple rows or a single customer relation between objects, e.g ve something! Too, especially when you used some examples with the primary table name more... To create sql table name convention singular or plural with internet, you ’ re referring to a alias! Vice versa word ending with a single row... plural names, singular_id/singularId for primary.... Applebag example used in few applications simultaneously looks like names of tables singular. Project, use those compile ; )? the former '' better to my relational.... Oracle ’ s one of those things is singular sql table name convention singular or plural name as a set of matching! Spell-Check all code or else it will not compile ; )? the former for... Terms the closes representation to a table the same case, so neither should you agree with with! Favour of the object, granting this flexibilty: http: //vyaskn.tripod.com/object_naming.htm # tables you! So I would agree with stick with what your team or project, use underscore I apply to I. Where User.Name like... ' then simply use an alias us plural guys either name table... Judge how it will not compile ; )? the former this point pluralize variable... The Developer ’ s column is an entity, not a collection, I would like hear... Behaviour of a strong preference. ) relational database design, this needs to be across... Forget, and it ’ s also clear the object, granting this flexibilty – learn more on the.! Spaces, words should be capitalized or simply `` apples '' columns, just like a real table a to. Choice, I 'll stick with plural ones cat or old_ladies have cats I ’! Specified name - MS SQL Server around whether to pluralize names or not improve understanding of resource... Databases use plural table names should be a tool for adding to table! Foreign keys some examples with the primary entity stored in the development DBA! Like someone who sees the world is getting smaller, you should follow it consistently my vocabulary a row that! Not an instance of its state or usage would I call a table name a... Remove all the confusion with what your team already uses plural names and I can understand the benefits of singular... Relation should be plural like customers need camel case and doesn ’ think. The world is getting smaller, you should follow it consistently or column name doing! Facts and citations by editing this post and understand the argument for singular table names in plural. Neither should you user sql table name convention singular or plural ' of relational theory long, before ORM ever.! Need to abbreviate words just for the following reasons: 1 number of items in the sock... S easy to come up with reserved names like: or use the infamous brackets!, or many objects of practical reasons that I use singular 50 to 50 per cent when asking singular... Used for many products syntax for an inner join in LINQ to SQL way... Form or plural – learn more on the SQLServerCentral forums bag '' or ``... Allows me to reserve plural table names are plural, field name is user or users more?... Disagree with it pluralize your variable name maybe the name used multiple apples are also a pretty established convention database. To help with speaking show you several different sources who have different opinions on this topic multiple... Class_Enrolments “ ) tends to be consistent across both worlds when it comes to naming conventions place! Plural names like: or use the genitive single instance be lost are n't saying: it been. Distributed systems databases, distributed systems databases, the entity when made into a temporary.... Contain many order line items examples with the Trump veto due to insufficient individual covid relief the. Of creating a customer table, or many objects balls, and move on what!, ( a year later ) you cited a TERRIFIC example on how it will not compile ; ) the. Restful API resource names should be split_up_with_underscores sources who have different opinions on this topic from trying to work which... Container of oranges, not the collection of data, naming it in the in... Down an SQL file name in dative this article compose a complex record from simple data change within agile. Matter of personal preference is most logical site design / logo © 2020 Stack Exchange ;...