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How to list the source table name of columns in a VIEW (SQL Server 2005) Expand / Collapse
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Posted Friday, August 17, 2012 12:54 AM
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Just wondering how to list column name and table name in one query for a view

for example

a view named as viewC, create by tbl1 inner join tbl2, contain a,b,c,d, 4columns.

a,b from tbl1, c,d from tbl2

How to Select COLUMN_NAME, DATA_TYPE, column_default, character_maximum_length, sourceTableNAME FROM information_schema.columns where table_name='viewC' together?

the result I want is:

column_NAME, table_name
a,tbl1
b,tbl1
c,tbl2
d,tbl2


Thanks
Post #1346355
Posted Friday, August 17, 2012 1:02 AM


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Have a look in INFORMATION_SCHEMA.VIEW_COLUMN_USAGE for the view-related info - you may have to join that to another i_s view to get everything you want.


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Post #1346358
Posted Friday, August 17, 2012 1:47 AM
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Thanks,

I have wrote my query and it works

SELECT INFORMATION_SCHEMA.VIEW_COLUMN_USAGE.TABLE_NAME, INFORMATION_SCHEMA.COLUMNS.COLUMN_NAME,
INFORMATION_SCHEMA.COLUMNS.ORDINAL_POSITION, INFORMATION_SCHEMA.COLUMNS.COLUMN_DEFAULT, INFORMATION_SCHEMA.COLUMNS.DATA_TYPE,
INFORMATION_SCHEMA.COLUMNS.CHARACTER_MAXIMUM_LENGTH
FROM INFORMATION_SCHEMA.VIEW_COLUMN_USAGE INNER JOIN
INFORMATION_SCHEMA.COLUMNS ON INFORMATION_SCHEMA.VIEW_COLUMN_USAGE.VIEW_NAME = INFORMATION_SCHEMA.COLUMNS.TABLE_NAME AND
INFORMATION_SCHEMA.VIEW_COLUMN_USAGE.COLUMN_NAME = INFORMATION_SCHEMA.COLUMNS.COLUMN_NAME
Post #1346378
Posted Friday, August 17, 2012 2:12 AM


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Nice work - thanks for posting back.

May I suggest that you consider using table aliases - it will make your query much more readable. Eg

select t.col1, t.col2 from tablewithaverylongnameindeedohyes t

--rather than

select tablewithaverylongnameindeedohyes.col1, tablewithaverylongnameindeedohyes.col2 from tablewithaverylongnameindeedohyes




Help us to help you. For better, quicker and more-focused answers to your questions, consider following the advice in this link.

When you ask a question (and please do ask a question: "My T-SQL does not work" just doesn't cut it), please provide enough information for us to understand its context.

It is better to keep your mouth shut and appear stupid than to open it and remove all doubt. (Mark Twain)
Post #1346388
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