How to add dynamic column to an existing table

Question

I have 2 tables 1st table contains following columns,

 id code    Name
 1  c1  chk1
 2  c2  chk2
 3  c3  chk3

2nd table contains following

Answer 1

Try this:

CREATE PROCEDURE 
AS 
BEGIN    
    DECLARE @COLUMN varchar(10), @SQL Varchar(100);
    SELECT @COLUMN = Name FROM Table1 
    WHERE id = (SELECT MAX(id) FROM Table1)
                IF NOT EXISTS(
                              SELECT COLUMN_NAME 
                              FROM INFORMATION_SCHEMA.COLUMNS
                              WHERE TABLE_NAME = 'Table2' 
                              AND COLUMN_NAME = @COLUMN
                             )
                 BEGIN
                   SELECT @SQL = 
                          'ALTER TABLE Table2 ADD '
                           +@COLUMN+' varchar(10),'
                           +@COLUMN+'_CompletedDate varchar(50)'
                   EXECUTE (@SQL)
                 END
END