update query with join on two tables

Question

I have customer and address tables.

Query:

SELECT *
FROM addresses a,
     customers b
WHERE a.id = b.id

Answer 1

this is Postgres UPDATE JOIN format:

UPDATE address 
SET cid = customers.id
FROM customers 
WHERE customers.id = address.id

Here's the other variations: http://mssql-to-postgresql.blogspot.com/2007/12/updates-in-postgresql-ms-sql-mysql.html