For example, what is the correct way to name a table that contains customer information in a relational database schema? Keep the length to a maximum of 30 bytes—in practice this is 30 characters unless you are using a multi-byte character set. Names must begin with a letter and may not end with an underscore. In this article, some most common guidance in naming conventions will be given and shown how ApexSQL Refactor, SQL formatting Visual Studio and SSMS add-in with nearly 200 formatting options, can help in achieving capitalization consistency among team members.. In this article, I would like to share some common and useful naming conventions and standards that you should use while programming with SQL Server. However, a single consistent naming convention should be … So avoid using this as a naming convention. Table names must follow the rules for SQL Server identifiers, and be less than 128 characters. SQL Server Database Coding Standards and Guidelines – Part 1. Conversely, there are many reasons to use singular object names. In this case, Person could become People or Persons; a singular Moose would look the same as its plural form, Moose. Sticking with singular object names avoids this problem entirely. When the … Link: Database object naming conventions for SQL Server. For words less than three characters, it’s recommended to use only uppercase, as in UI or IO. Object identifiers should describe what is contained within, not the object itself. Why sysproxylogin and not sysproxylogins? There isn’t the same fervor with case conventions as with pluralization, but arguments are made for several different options. Database identifier naming rules . General Naming Conventions . A well-designed model allows the viewer to immediately understand the purpose of the underlying objects. (Although why would you need a table of moose?) This includes both tables and columns. If the subdirectory does not exist, SQL Backup will create it for you (if it has the necessary permissions) prior to backing up your database. Spreading out data and log files on RAID improves performance. Select a source of code in Visual Expert’s treeview, under the ‘Applications’ node. While several facets of naming an object deserve consideration, in this article we’ll focus on the most important one: defining a convention and sticking to it. Specifically, I'll describe naming conventions for database objects, why they are so important, and what you should and shouldn't be doing.Warning! They found that use of Camel Case (or Pascal Case) improved typing accuracy and recognition. It requires no explanation as to the nature of the data; singular naming conventions are used, and clear identifiers are in place. This may make underscores slightly preferable to prevent confusion, but Intellisense also helps eliminate typing mistakes in most modern programming environments. Hungarian notation (which was always intended to identify variable usage) slipped into common SQL Server naming conventions, but it is widely derided. Do not use spaces in the name. Use both upper and lower case letters as appropriate. But you should form opinions yourself if you don't have any, and adhere to them. is the blog for Robert L Davis. And very vocal and passionate in their defense of the same. While it is possible to use the convention from SQL Server, if you're looking at the table and column information from the database you will find it is stored in lowercase, this often makes it harder to read later. When any identifiers are to be referenced as foreign keys, be liberal in the name – Customer.CustomerID rather than Customer.ID. This also ties in with another recommendation – precision. If you don't have one, consider creating one. System.CreateDate is far clearer than System.Date. In many languages, naming conventions (of identifiers) is not really relevant, because the way the language designs namespacing, there is relatively little risk for conflict. 5 Tips for Friday I want to talk about some best practices concerning naming conventions. In SQL, this is a bit different. Catalog 2. This includes both tables and columns. UQ is sometimes used for unique indexes as well. Using SET NULL and SET DEFAULT with Foreign Key Constraints (12 August 2008) Implementing Table Interfaces (19 May … MySQL treats the catalo… I’ve already stated it in the intro, but more generally, a naming convention is a set of rules you decide to go with before you start modeling your database. An additional consideration here is the case-sensitivity of the database. While SQL Server supports both catalog ANDschema, most dialects only support one of them 2. While many words will be straightforward (Customer becomes Customers, Product becomes Products), other words may not be. For example: SQL_Latin1_General_Cp437_CS_AS_KI_WI: Case Sensitive The Singular vs. Plural Debate and the Great Case Question may be where the battle is the fiercest, but there are at least three more areas to keep in mind when considering a naming convention. He is a SQL Server Certified Master, MVP, and has spent 17+, As a Microsoft Certified Master/Microsoft Certified Solutions Master and SQL Server MVP, I have over 20 years’ experience in the, Principal Data Management Architect for Pure Storage (Site|@PureStorage) MCM: SQL Server VMware vExpert Infosec/OpSec enthusiast Former Microsoft MVP #TeamProfiler (more…), We write solutions for SQL Server that don’t actively make us angry. There are many different naming conventions for SQL Server and no single convention is necessarily right or wrong. Finally, you can establish a standard naming convention, and simply use the option to generate a file name using that standard naming convention. I started working with databases over 20 years ago now. If you are involved with SQL and want to simplify it, are tired of conflicting information about data integrity, or just want to make database programming easier, then it is important to know these database naming conventions best practices. Tables: Rules: Pascal notation; end with an ‘s’ Examples: Products, Customers; Group related table names 1; Stored Procs: Rules: sp_[_] Examples: spOrders_GetNewOrders, spProducts_UpdateProduct Ensure the name is unique and does not exist as a reserved keyword. Avoid using any SQL Server reserved words as object names. Avoid prefixes and suffixes for tables and views, such as tblTable. At first glance, it’s natural to think of a collection of objects in the plural. 5 Tips for Friday I want to talk about some best practices concerning naming conventions. All database names must be prefixed with the originating component's acronym--e.g., CBC_Medicare_Compare or EDG_Database_Tracking. box of customers isn’t “a boxes of customers”, even if it has a large number of customers inside. If you do not specify the database where the object is, SQL Server will first search the master database to see if the object exists there and then it will search the user database. The third index was also created with dta but it was left with the default dta naming convention. Database object names are referred as identifiers, and are created when a database object is defined. You’ll apply these rules while naming anything inside the database – tables, columns, primary … You might be wondering why we need conventions or best practices for naming SQL tables in the first place.Can’t we just name it what we want, and move on?We could do that… but it’s better to have naming conventions for several reasons: 1. Other Naming Convention Considerations. An appropriate SQL Server database file name is essentially one that is self-documenting; one should be able to determine the exact purpose of a file simply by examining the name. Column (or parameter, attribute) Some dialect dependent caveats: 1. I. My questions are: How can we change the naming convention for 200 tables in a production server? Coding Standards. The information presented here serves as a guide for you to follow when naming your database objects. I want to talk specifically about things inside the database or on the SQL Server server. Table and column names: Should contain only letters, … As with the other topics, following an established convention is more important than the selection of the convention itself. In the end, there are advantages and disadvantages to each side of the convention naming debate. If the For example – User, Time, and Date are reserved. Having clear, concise names for tables, procedures, etc., is important for many reasons. Additionally, there could be only one item – or none – inside the table, making “customers” a misnomer. Spaces in object names require quotes to reference. However, prefixes are useful in SQL Server supporting objects, as they describe the functional nature of the object. What SQL naming conventions do you use and why? The old naming convention is not following any standards. Most teams or organizations will come up with their own naming conventions for things. One of the things you do not want to use as a standard is "sp_". Reserved keywords may require additional care to reference (such as using square brackets) depending on the calling application. Like the first one I know the date it was created but instead of the word Cover2, I know there are 16 key columns are noted by the “K#” and regular numbers tell me those are included columns. Underscores were widely used in C programming, but the trend is towards Camel/Pascal Case with recent emphasis on Microsoft and Java-style languages. In arguments for plural table names, rows in a table are also referenced as ‘instances’ of a whole – similar to items in a collection. The main purpose for adopting a naming convention for database objects is so that you and others can easily identify the type and purpose of all objects contained in the database. Unless specified otherwise, all Transact-SQL references to the name of a database object can be a four-part name in the following form:server_name.[database_name]. Visual Expert lists the objects that do not follow the predefined naming rules along with a hint on the correction that needs to be made. A convention such as People.FirstName starts to become confusingly unclear. The ISO/IEC naming principles, while dated, recommend pluralized table names and singular column names. Researchers at Johns Hopkins University conducted a study on the efficiency of using underscores in programming object names. There is one key point, however, that both sides can agree upon: regardless of the decisions made, be consistent with the selected convention. Increased RAM is largely beneficial to DMBS systems. This post is not here to tell anyone how to define their naming conventions, especially for things outside of SQL Server. Related Articles. SQL Server collation determines this sensitivity with ‘CS’ (case-sensitive) or ‘CI’ (case-insensitive) in the collation name. It makes searching for the relevant procedure/table easier. While you do not have to follow the recommended naming conventions, doing so can make it much easier to use SuperCHANNEL with your data. [schema_name].object_name| database_name. Poorly-named tables and other objects make it difficult to maintain databases. While there may be many items (or customers) in a table, the table itself can be considered a single entity. If you have any questions or you need our help, you can contact us through