Can we ALTER TABLE variable in SQL Server?

Question

You cannot alter the definition of a table variable once it is declared. This means that everything you need in the table definition must be included in the original DECLARE statement. 23 сент. 2009 г.

How do I change the table variable in SQL Server?

DECLARE @TableName varchar(128) SET @TableName = 'Cases' DECLARE @sqlcmd VARCHAR(MAX) SET @sqlcmd = 'ALTER TABLE ' + QUOTENAME(@TableName) + ' ALTER COLUMN [CreatedBy] varchar(256);'; EXEC (@sqlcmd); SET @sqlcmd = 'ALTER TABLE ' + QUOTENAME(@TableName) + ' ALTER COLUMN [LastUpdatedBy] varchar(256);'; EXEC (@sqlcmd);

Can we ALTER TABLE type in SQL Server?

Since the advent of table-valued parameters in SQL Server 2008, table types have become more and more popular. Unfortunately, once a table type is actively being referenced by one or more objects, it is cumbersome to change. There is no ALTER TYPE, and you can't drop and re-create a type that is in use.

How do you alter a table value?

The basic syntax of an ALTER TABLE command to change the DATA TYPE of a column in a table is as follows. ALTER TABLE table_name MODIFY COLUMN column_name datatype; The basic syntax of an ALTER TABLE command to add a NOT NULL constraint to a column in a table is as follows.

What is table variable in SQL Server?

Definition. The table variable is a special type of the local variable that helps to store data temporarily, similar to the temp table in SQL Server. In fact, the table variable provides all the properties of the local variable, but the local variables have some limitations, unlike temp or regular tables.

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