smudholkar,
Tuesday, September 17, 2002, 12:26:05 AM, you wrote:
saadc> I am trying to write a delete query that will remove
saadc> records from one table based on information from
saadc> another table. In this example, there is a table called
saadc> accounting which contains two fields: username and
saadc> sessiontime and another table called users with two
saadc> fields: username and password. I would like records to
saadc> be deleted from the users table if the session time in
saadc> the accounting table exceeds a certain value, say 1000.
saadc> I have written the following statement:
saadc> delete from users where accounting.username =
saadc> users.username and accounting.sessiontime > 1000;
saadc> The statement fails to execute with the following
saadc> error: “Unknown table ‘accounting’ in where clause” and
saadc> I can’t figure out why. Your help is greatly
saadc> appreciated, thanks in advance!
Because you don't specify table 'accounting' in the FROM clause. take
a look at correct syntax for multi-table delete:
http://www.mysql.com/doc/en/DELETE.html
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