troubleshooting Question


Avatar of BobSamonik
BobSamonik asked on
Microsoft Access
6 Comments1 Solution349 ViewsLast Modified:
I have table T and fields F1,F2,F3,F4
Now, I have to update field F3 and calculate filed F4 based on the values of the fields 1-3
First I select the row from T (SELECT F1,F2 FROM T WHERE ...), then do the caclulation and finaly update (UPDATE T SET F4=... WHERE ...)
But between select and update I have to ensure that nobody changes the fields F1 and F2 before I do the update!
Please, simple example in VB or comment with solution
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