sqlserver 存储过程实例

ALTER PROC [dbo].[SP_mm_NS] (
@ID NVARCHAR(60),
@ReturnCode NVARCHAR(30) OUTPUT,
@ErrorMessage NVARCHAR(2000) OUTPUT
)
AS
BEGIN
DECLARE
@rtnCode NVARCHAR(30),
@rtnText NVARCHAR(2000)

DECLARE
@P_BillID NVARCHAR(60),
@P_LineItemNo INTEGER

SELECT @rtnCode = '0' ,@rtnText = ''

BEGIN TRY
SELECT * FROM dbo.temp_table

DECLARE Table_crsr CURSOR FOR SELECT
CVLevel
FROM #tempTable
OPEN Table_crsr
FETCH Table_crsr INTO

@CVLevel
WHILE @@FETCH_STATUS = 0
BEGIN
---

FETCH Table_crsr INTO
@CVLevel
END
CLOSE Table_crsr
DEALLOCATE Table_crsr

DECLARE @C NVARCHAR(60)
DECLARE @sql NVARCHAR(500)
DECLARE @i INT
SET @i=1
WHILE(@i<=@CVLevel)
BEGIN
SET @C ='CVLevel_'+ CONVERT(NVARCHAR(60), @i)
SET @sql = 'ALTER TABLE @Table ADD ' + @C + ' NVARCHAR(60)'
PRINT '@sql ='+@sql
EXEC(@sql)
SET @i=@i+1
END

END TRY
BEGIN CATCH
SET @rtnText= ' ERROR_PROCEDURE='+ ERROR_PROCEDURE()
+', ERROR_LINE='+convert(varchar(10), ERROR_LINE())
+', ERROR_NUMBER='+ convert(varchar(10), ERROR_NUMBER())
+', ERROR_MESSAGE='+left(ERROR_MESSAGE(), 255)
SET @rtnCode='1'

END CATCH
L_END:

SELECT @ReturnCode = @rtnCode, @ErrorMessage = @rtnText
END