Important Points About SQL Server Table Variable
- A table variable in SQL Server is a local variable that stores data temporarily, similar to temporary tables.
- It provides all the properties of a local variable but with some limitations compared to temp or regular tables.
- Table variables can be used for operations like insert, update, delete, and select within a SQL script.
- Table variables are not available after the execution of a complete query, unlike temporary tables that persist after the query execution.
- The lifecycle of a table variable starts from its declaration and ends when the declaration batch or stored procedure goes out of scope.
- Table variables can be used in SELECT, INSERT, UPDATE, and DELETE statements within their scope.
- The INTO clause in a SELECT statement cannot be used to create and populate a table variable.
- The structure of a table variable cannot be changed after it has been declared.
- Indexes cannot be created on table variables using the CREATE INDEX statement.
SQL Server Table Variable
SQL Server Table variable is a local variable that stores data temporarily, similar to the temporary table in SQL Server.
Tempdb database is used to store table variables.