I've tried for hours... and my issue is this:
Table 1 has FirstName, LastName, Address, Birthday, (and other
columns)
Table 2 has FirstName, LastName, Address, Birthday, (and other
columns)
Most of Table1.Birthday is null. Some are not.
All of Table2.Birthday has valid Birthdays.
I want to insert Table2.Birthday into Table1.Birthday only where
Table1.Birthday is null.
Any help is appreciated.