Inserting records from a SELECT statement (MySQL)

Bong-Bong — Tue, 09 Sep 2008 06:32:20 +0000

I often forget even simple syntax that makes MySQL operation easy. I’m just adding this basically for personal reference.

Using INSERT statement combined with the SELECT statement you could actually add records from one table to another table. Adding a WHERE clause could enable you to filter the records to copy. Below is the syntax.

INSERT INTO table_destination SELECT * FROM table_source [WHERE condition];

However this generic statement only works if the two tables have the same order of columns and has compatible data types. If that is not the case you would need to specify the columns like the following syntax:

INSERT INTO table_destination (column_1, column_2, column_3)
SELECT column_1, column_2, column_3 FROM table_source [WHERE condition];

NOT id IN (1, 2, 3) vs NOT (id IN (1, 2, 3))

Bong-Bong — Fri, 05 Sep 2008 05:23:00 +0000

Problem:

You’re probably wondering why the following query doesn’t work on some mySQL databases

SELECT * FROM table1 WHERE NOT id IN (1, 2, 3)
works on mySQL v5.0.51a
doesn’t work on mySQL v4.1.21

Solution:

The reason is that the query would confuse the older version what to evaluate by NOT.

This query generally works.

SELECT * FROM table1 WHERE NOT (id IN (1, 2, 3))
works on mySQL v5.0.51a
works on mySQL v4.1.21

This is basically just specifying what should value should be evaluated by NOT.

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Inserting records from a SELECT statement (MySQL)

NOT id IN (1, 2, 3) vs NOT (id IN (1, 2, 3))