InstantForum.NET v2.9.0SQLServerCentralhttp://www.sqlservercentral.com/Forums/notifications@sqlservercentral.comSat, 18 May 2013 16:12:40 GMT20http://www.sqlservercentral.com/Forums/Topic571824-8-1.aspxIs the data you supplied an actual example of your how data table is structured, or is that just to help explain what you need? If the latter, how is the data in your tables structured?Thu, 18 Sep 2008 09:12:20 GMTGaradinhttp://www.sqlservercentral.com/Forums/Topic571824-8-1.aspxWe have clients that are on a program for a few months, then off, then back on the program again. I need to find out how many months they are on the program and then how long they stay on or stay off (spells on or spells off)For example, if January 2006 is period 1, February is period 2 and until September 2008 is period 33 then if I have a client ID, how many periods is the client on the program and if they are off how many months and for how long. Client 1 on the program Jan 2006 (period 1) through April 2006 (period 4), off the program from May 2006 (period 5) to September 2006 (period 9) but is back on in October 2006 (period 10). So the client is on for periods 1-4 which makes that a spell count of 4, off for 5 spells then back on. Year Month Period On/off Spells2006 January 1 on 12006 February 2 on 22006 March 3 on 32006 April 4 on 42006 May 5 off 12006 June 6 off 22006 July 7 off 32006 August 8 off 42006 Sep 9 off 52006 October 10 on 1Since there are thousands of clients, is there a way to get this to work in T-SQL 2000? I need to know the period and spells for each client. ThanksThu, 18 Sep 2008 08:34:22 GMTNo Idea