Question

In SQL Server, I can do something like this:

UPDATE tbl1 
   SET col2 = tbl2.col2 
  FROM table1 tbl1 
 INNER JOIN table2 tbl2 
    ON tbl1.col1 = tbl2.col1

I haven’t bothered to look whether this is part of any SQL standard or not, and I’m sure there are other ways to do it, but it is astoundingly useful.

Here’s my problem. I need to do something similar in SQL (i.e, not a host language) with SQLITE3. Can it be done?

Answer 1

This works for sqlite:

UPDATE tbl1 SET col2 = (SELECT col2 FROM tbl2 WHERE tbl2.col1 = tbl1.col1)