Question

I am looking for a way to update a table containing city, state, zip, and county by using a different table containing all the necessary information.

To put it simply, I have a table (let’s call it Table1) that lists all the cities, states, and counties by zip code (or whatever order you want to put those in). I want to update a different table (call it Table2), specifically city, state, and county, using the zip code from Table1.

EDIT: MS SQL Server

Answer 1

UPDATE A
SET A.City = B.City
FROM Table2 AS A
INNER JOIN Table1 B
ON A.PostalCode = B.PostalCode
WHERE A.City IS NULL --Or Some Other Criteria