Shulou(Shulou.com)06/01 Report--

What is T-SQL? Many novices are not very clear about this. In order to help you solve this problem, the following editor will explain it in detail. People with this need can come and learn. I hope you can gain something.

T-SQL (Transact-SQL) is a set of programming extensions to Sybase and Microsoft that adds several functions to the structured query language (SQL), including transaction control, exception and error handling, row handling, and declared variables.

Related mysql video tutorials

All applications that communicate with SQL Server are achieved by sending T-SQL statements to the server. T-SQL queries include SELECT statements, select columns, mark output columns, restrict rows, and modify search criteria.

At the same time, T-SQL identifiers are used for all databases, servers, and database objects in SQL Server. These include tables, constraints, stored procedures, views, columns, and data types. Each T-SQL identifier must have a unique name, assigned when the object is created, and used to identify the object.

Example of T-SQL statement

The most popular T-SQL statement is a stored procedure, which is a compiled and stored T-SQL code. Similar to the view, the stored procedure generates an execution plan on the first call. The difference is that the stored procedure can select data and execute any T-SQL code within any parameter.

A user-defined function is another example of a T-SQL statement. The user-defined function accepts input parameters, performs the operation, and returns the result to the call.

Another example is a trigger, which is a stored T-SQL script that runs when a statement other than SELECT is issued against a table or view. Two common triggers are AFTER and INSTEAD OF triggers.

Programming T-SQL statements enables IT professionals to build applications included in SQL Server. These applications-or objects-can insert, update, delete, or read data stored in the database.

The common language runtime (CLR) integration is the final example of a T-SQL statement. Since SQL Server 2005, IT professionals have been able to contact. NET Framework CLR integration. This allows you to use it in a SQL Server object. NET programming language to create stored procedures, user-defined functions and triggers.

T-SQL function

In addition to SQL Server's built-in functions, users can also use T-SQL to define functions.

The types of T-SQL functions include aggregate functions that operate on a set of values but return a summary value; ranking functions that return ranking values for each row in the partition; rowset functions that return an object that can be used as a table reference in a SQL statement; and scalar functions that run on a single value and return a single value.

SQL Server also supports analysis functions in T-SQL to describe complex analysis tasks. These analysis capabilities enable IT professionals to perform common analyses, such as rankings, percentiles, moving averages, and cumulative sums, to be represented in a single SQL statement.

Is it helpful for you to read the above content? If you want to know more about the relevant knowledge or read more related articles, please follow the industry information channel, thank you for your support.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.