The Record That Never Existed (as a committed row)

Introduction According to the official documentation, the READ COMMITTED isolation level “specifies that statements cannot read data that has been modified but not committed by other transactions”. So, one could think that a record returned under this isolation level existed in the committed state at the time of reading. In this article, I am going […]

Transaction Isolation Levels

Introduction While working with SQL databases, we ...

System databases Isolation

RE: Help with UPDATE query

Thanks for the reply. I had tried replacing the OR with an AND, and I still get the same results. IF EXISTS(SELECT F00069, F00026, F01298, F01299, F01300 FROM patient INNER JOIN tumor ON patient.UK = tumor.FK1 INNER JOIN followup ON tumor.FK1 = followup.FK1 INNER JOIN hospital ON tumor.UK = hospital.FK2 WHERE (hospital.F00026 = '0' OR […]

RE: Insert From Query failure

Yes, the not exists criteria within the query seems to work.  Don't know why I didn't consider doing that...thanks guys!