A stored procedure runs for forty minutes and you need the busy line. Here is how to pull it out of the batch text without the usual off-by-two mistakes.

Update a row in a ledger table and the old version stays. Then verify the history with a digest, and break the digest to see what failure looks like.

That per-second counter on your dashboard is probably a running total. Here is how to turn it into a real rate with two samples.

An attendee says two sessions run at the same time. Here is how to find every overlapping pair once, and why touching is not a clash.