Is there a way for formulate a query which selects common values in a column, and then without changing the order they appear in the table, selects the first of those values?
eg - in a column containing session ids, is there a way to select the first time a particular session id is created?
Hope that's clear enough. Thanks
eg - in a column containing session ids, is there a way to select the first time a particular session id is created?
Hope that's clear enough. Thanks