Iterate throught database tables

• techzone12

  SSCommitted

  Points: 1798

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  March 18, 2015 at 12:00 pm

  #316330

  MS SQL 2008

  I want to execute a delete query on certain tables in my database to delete some rows in the tables.

  The tables selected has a certain name pattern (the name ends with "Temp").

  So I can do this to get a list of the table names

  SELECT name

  FROM sys.Tables where

  name like '%Temp'

  Now I want to check each table to see if it has a column with the name "DateStamp" and then execute a delete query as follows:

  delete form TableName where

  DateStamp is < '2010-01-01'

  In other words I need to iterate through the tables names

  How to do this?

• Lowell

  SSC Guru

  Points: 323518

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  March 18, 2015 at 12:19 pm

  #1784866

  you can find every column namedDateStamp, and it's tablename (but it might be VIEWNAME !!) you can join to sys.tables and then sys.columns as instead

  select

  'delete from '

  + quotename(object_name(object_id))

  + ' WHERE '

  + quotename(name)

  +' < 2010-01-01'';'

  from sys.columns

  where name = 'DateStamp'

  then you can copy and paste the code to execute, after you reviewed it of course

  Lowell

  ---

  --help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!

• techzone12

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  March 18, 2015 at 12:53 pm

  #1784886

  How to add one more condition that the table name ends with "Temp"

  I am trying to do an inner join, so far no success yet.

• Lowell

  SSC Guru

  Points: 323518

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  March 18, 2015 at 12:58 pm

  #1784889

  techzone12 (3/18/2015)

  ---

  How to add one more condition that the table name ends with "Temp"

  I am trying to do an inner join, so far no success yet.

  here's a full example:

  select

  'delete from '

  + quotename(tabz.name)

  + ' WHERE '

  + quotename(colz.name)

  +' < 2010-01-01'';'

  from sys.tables tabz

  inner join sys.columns colz

  on tabz.object_id = colz.object_id

  where colz.name = 'DateStamp'

  and tabz.name like '%temp'

  Lowell

  ---

  --help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!

• techzone12

  SSCommitted

  Points: 1798

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  March 18, 2015 at 1:30 pm

  #1784894

  I am amazed with the quality of answers on this site. Fast and accurate, but yet efficient code.

  Thanks for the help