MySQL INSERT SELECT not Inserting

问题

I am trying tor un an insert select that looks like this:

INSERT INTO users_extension_usage (userid, extensionid, complete) 
SELECT '3', extensions.id FROM extensions WHERE extensions.folder='definitions', '1'

however it has a problem when I run it in phpMyAdmin that refers to the '1':

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ' '1'' at line 2

I have tried many different combinations of SELECT, INSERT etc but I cat see the problem. I have looked at any different posts on here and other forums too but alas most suggest the syntax I am using!

I have tried to set up an SQL Fiddle here: http://sqlfiddle.com/#!9/9f460

Any suggestions for how this might work will be gratefully accepted :)

回答1:

You are missing the third column:

INSERT INTO users_extension_usage(userid, extensionid, complete) 
    SELECT '3', extensions.id, '1' as complete
    FROM extensions
    WHERE extensions.folder = 'definitions';

The '1' belongs in the SELECT statement, not after the WHERE.

来源：https://stackoverflow.com/questions/35762840/mysql-insert-select-not-inserting