rbar

问题 I'm not a expert on SQL and I'm working on a huge SQL code and unfortunately it has a CURSOR which handles another two nested CURSORS within it (totally three cursors inside a stored procedure), which handles millions of data to be DELETE,UPDATE and INSERT. This takes a whole lot of time (more than 13 hrs and eventually gets an error 'cursor names datasets already exists') because of row by row execution and I'm trying to modify this in to SET based approach and I'm stuck how to do the INSERT

问题 I have an interesting conundrum here, how do I quickly (under 1 minute) export a large datatable (filled from SQL, 35,000 rows) into an Excel spreadsheet for users. I have code in place that can handle the export, and while nothing is "wrong" with the code per se, it is infuriatingly slow taking 4 minutes to export the entire file (sometimes longer if a user has less RAM or is running more on their system). Sadly, this is an improvement over the 10+ minutes it used to take using our old