I am not looking for help with the actual code of my stored procedure (yet anyway), but a client sent me a copy of his SQL Server 2000 database stating that a particular proc was returning incorrect results; I restored the database to my server (SQL Server 2008R2) and ran the proc and it produced the correct results. Keep in mind there is no front-end that could be causing the difference - in both the cases I simply execute the proc thru enterprise manager and management studio.
I am wondering if there are any known differences that might contribute/cause this problem? This particular proc uses a lot of conditional logic, default parameters and even has a cursor to do some looping logic, but any suggestions on possible areas to look at would be helpful.
Edit: to clarify, the number of rows and columns returned are the same, but for a particular column (for certain rows depending on value of a data field), the number is exactly double what it should be. 2008 gives the 'correct' answer. '2000' gives the wrong answer, i.e. the double amount.