SQL query contains IF / ELSE statement [duplicate]

Question

Possible Duplicate:
Solutions for INSERT OR UPDATE on SQL Server

I am in a great trouble that I want write a SQL query that include a conditional statement.

EG : I have a SQL table with columns ID,NAME,STATUS so before I insert value in to this table I want to check the name that is already exists in the table. If it is exist then I want to update the status value.

Is it possible to write the query by using queryString (SQL Server query instead of stored procedure) method, If anybody knw pls help me. I am using SQL Server 2008 R2

Answer 1

You want the MERGE query syntax

From the documentation ( http://technet.microsoft.com/en-us/library/bb510625.aspx )

MERGE Production.UnitMeasure AS target
USING (SELECT @UnitMeasureCode, @Name) AS source (UnitMeasureCode, Name)
ON (target.UnitMeasureCode = source.UnitMeasureCode)
WHEN MATCHED THEN 
    UPDATE SET Name = source.Name
WHEN NOT MATCHED THEN   
    INSERT (UnitMeasureCode, Name)
    VALUES (source.UnitMeasureCode, source.Name)
    OUTPUT deleted.*, $action, inserted.* INTO #MyTempTable