Hi guys! I have some weird output from one of my SQL statements. Here it's is:
select count(*) from libvolumes where status='Private' Unnamed[1] ------------ 3698 Ok, so 3698 private volumes on this server. Now, how many contain data: select count(*) from libvolumes where status='Private' and last_use = 'Data' Unnamed[1] ------------ 1011 Right, I know a lot of tapes do not have a value in the Last Use column (my guess it is that these are tapes created by SAN clients), so how many are there: select count(*) from libvolumes where status='Private' and last_use != 'Data' Unnamed[1] ------------ 0 Huh? There should be 3698-1011=2687! Last_use is empty then? select count(*) from libvolumes where status='Private' and last_use=NULL Unnamed[1] ------------ 0 I'm lost here... I'm I doing something wrong? The total of last_use='Data' and last_use!='Data' should be the same as the output from the query with no last_used specified, right? Thanks for any help in advance! Kind regards, Eric van Loon ******************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ********************************************************