Thanks rafrancisco. I am new on the SQL.
Question: Why you declare @SQL as VARCHAR(1000), not nvarchar(1000)?
What is the different and is this important?
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SQL script "Alter Table" using Variable in the SQL Server
Here is the script I used in the SQL Server:
-- constants --
DECLARE @sColumn nvarchar(64) -- name of the added column
DECLARE @sTable nvarchar(64) -- name of the table
Set @sColumn = 'Col1'
-- Add column to Mon_BOL
Set @sTable = 'Tab1'
ALTER TABLE @sTable ADD @sColumn [nvarchar] (1024) COLLATE SQL_Latin1_General_CP1_CI_
When I copy it to the Query Analyzer, it gave me the error:
Server: Msg 170, Level 15, State 1, Line 10
Line 10: Incorrect syntax near '@sTable'.
My question is: Is this that Alter Table will not support variable, or my script was wrong?
Thanks
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by: rafranciscoPosted on 2005-08-17 at 12:28:19ID: 14695059
The ALTER TABLE command does not support variables. What you can do is to use dynamic SQL as follows:
-- constants --
DECLARE @sColumn nvarchar(64) -- name of the added column
DECLARE @sTable nvarchar(64) -- name of the table
DECLARE @SQL VARCHAR(1000)
Set @sColumn = 'Col1'
-- Add column to Mon_BOL
Set @sTable = 'Tab1'
SET @SQL = 'ALTER TABLE ' + @sTable + ' ADD ' + @sColumn + ' [nvarchar] (1024) COLLATE SQL_Latin1_General_CP1_CI_
EXEC (@SQL)