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Message Posted: Mon, 22 Oct 2012 @ 12:41:27 GMT


     
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Subj:   Re: How to find data type and nullability
 
From:   naresh.neelam

Hi Vinod,

The below query is useful to identified the column nullable from two tables in the the same data base(teradata).

i hopes it is useful.. then u can use colease or nullifzero as per your requirement on the columns returns by below query.

     SELECT A.COLUMNNAME, A.COLUMNFORMAT  FROM (SELECT
     COLUMNNAME,COLUMNFORMAT,CHARTYPE,NULLABLE,DATABASENAME
               FROM dbc.columns where tablename='TABLE1' ) A
               INNER JOIN
               ( SELECT  COLUMNNAME,COLUMNFORMAT,CHARTYPE,NULLABLE
                    from dbc.columns
                    where tablename='TABLE2' ) B
       ON  A.COLUMNFORMAT=B.COLUMNFORMAT
       AND A.CHARTYPE=B.CHARTYPE
       AND A.NULLABLE<>B.NULLABLE
       AND  A.DATABASENAME='STGDB'


     
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