Dynamically creating table

Question

4.00/5 (1 vote)

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hi,

i need a store procedure to create table dynamically
based on the value in temp table
i.e
if i pass 5 then table should be like
colname ='col'+ value
col1,col2,col3,col4,col5 all of them of same datatype

am using the below SP to alter the table

SQL

Create proc [dbo].[altertemp1](@Value_c varchar)
AS
BEGIN
DECLARE @intFlag INT
DECLARE @ColName nvarchar(100)
set @ColName='col'
DECLARE @DynamicSQL nvarchar(250)
SET @intFlag = 3
WHILE (@intFlag <=@Value_c)
BEGIN
set @ColName= @ColName + cast(@intFlag as nvarchar(100))
SET @DynamicSQL = 'ALTER TABLE ##Mytemp ADD ['+ CAST(@ColName AS nvarchar(100)) +'] binary(100) NULL'
EXEC(@DynamicSQL)
SET @intFlag = @intFlag + 1

end

END

the above SP am trying am getting like if i pass value 5 then mu out put is like col1,col12,col123 .....,any suggestion in my sp,any other method to do this process

thanks in advance

Posted 21-Dec-11 5:06am

pradeep manne

Updated 21-Dec-11 5:16am

Mehdi Gholam

v3

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Wendelius · Accepted Answer · 2011-12-21T09:29:00

Try something like:

SQL

CREATE PROCEDURE altertemp1(@ColNumMax int)
AS
BEGIN
   DECLARE @counter INT
   DECLARE @ColName nvarchar(100)
   DECLARE @DynamicSQL nvarchar(250)

   SET @counter = 1
   WHILE (@counter <= @ColNumMax) BEGIN
      SET @ColName= 'Col' + cast(@counter as nvarchar(100))
      SET @DynamicSQL = 'ALTER TABLE ##Mytemp ADD ['+ @ColName +'] binary(100) NULL'
      EXEC(@DynamicSQL)
      SET @counter = @counter + 1
   END
END
GO