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The SET clause specifies that the data in the Salary column be multiplied by 1.04 when the job code ends with a 1 and 1.025 for all other job codes.(The two underscores represent any character.) The CASE expression returns a value for each row that completes the SET clause.That way I could execute some query on the table variable in one part of the procedure, and then later execute some code for each row in the table variable. DECLARE @Rows To Process int DECLARE @Current Row int DECLARE @Select Col1 int DECLARE @table1 TABLE (Row ID int not null primary key identity(1,1), col1 int ) INSERT into @table1 (col1) SELECT col1 FROM table2 SET @Rows To [email protected]@ROWCOUNT SET @Current Row=0 WHILE @Current Row DECLARE @Rows To Process int; DECLARE @table1 TABLE (Row ID int not null primary key identity(1,1), col1 int ) INSERT into @table1 (col1) SELECT col1 FROM table2 SET @Rows To Process = @@ROWCOUNT WHILE @Rows To Process You can loop through the table variable or you can cursor through it.This is what we usually call a RBAR - pronounced Reebar and means Row-By-Agonizing-Row.Queries that modify table variables don't generate parallel query execution plans.Performance can be affected when large table variables, or table variables in complex queries, are modified.CREATE PROCEDURE Print Sequence Series -- Add the parameters for the stored procedure here @Coma Seperated Sequence Series n Varchar(MAX) AS BEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. The SELECT clause displays the table before the updates. The FROM clause specifies EMPLOYEES as the table to select from. The UPDATE statement updates the values in EMPLOYEES.
As such, they shouldn't be used when cost-based choices are required to achieve an efficient query plan.Temporary tables are preferred when cost-based choices are required.This plan typically includes queries with joins, parallelism decisions, and index selection choices.Functions and variables can be declared to be of type table.table variables can be used in functions, stored procedures, and batches.
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Transact-SQL Syntax Conventions Is the same subset of information that is used to define a table in CREATE TABLE.