Using Query results as sources

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Using Query results as sources

Author

Topic

ob61887
Starting Member

1 Post

Posted - 2012-10-12 : 23:56:17

Hello,

This is my first time posting so sorry if this is hard to read.

I am attempting to use a query to select tables and columns as the source for another script. I would use the below query to select the Tables and Columns I am looking for, and am curious if it is possible for another query to use the tables.columns retrieved here as its select and from sources.

select
a.TABLE_NAME,
b.COLUMN_NAME
from
INFORMATION_SCHEMA.TABLES as a
join INFORMATION_SCHEMA.COLUMNS as b on a.TABLE_NAME = b.TABLE_NAME
where
b.COLUMN_NAME like '%parameter'
order by 'TABLE_NAME', 'COLUMN_NAME'

So if this brought back:
TABLE_A1 COLUMN_1A
TABLE_A2 COLUMN_2A
TABLE_A3 COLUMN_3A

I would want the query to perform like:

select
COLUMN_1A
from
TABLE_A1
union
select
COLUMN_2A
from
TABLE_A2
union
select
COLUMN_3A
from
TABLE_A3

malpashaa
Constraint Violating Yak Guru

264 Posts

Posted - 2012-10-13 : 00:26:00

Try something like this:


DECLARE @stmt VARCHAR(MAX) = STUFF((SELECT ' UNION' +
                                           ' SELECT ' + B.COLUMN_NAME +
                                           ' FROM ' + A.TABLE_SCHEMA + '.' + A.TABLE_NAME
                                      FROM INFORMATION_SCHEMA.TABLES AS A
                                           INNER JOIN
                                           INFORMATION_SCHEMA.COLUMNS AS B
                                           on A.TABLE_NAME = B.TABLE_NAME
                                     WHERE B.COLUMN_NAME like '%parameter'
                                     ORDER BY A.TABLE_NAME, B.COLUMN_NAME
                                     FOR XML PATH('')), 1, LEN(' UNION'), '');

EXECUTE(@stmt);

For us, there is only the trying. The rest is not our business. ~T.S. Eliot

Muhammad Al Pasha

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