I have 2 tables: users with columns (id,username, password), and user_failed with columns (user_id, failed, time). is there any possible way i can insert into table user_failed by only using username? i try this code but it failed:
INSERT INTO `login_attempts`(`user_id`, `time`, `failed`)
VALUES (SELECT user_id FROM users WHERE username = 'pokemon','',3)
Your SQL query is incorrect for several reasons.
The following should work if I have interpreted your query correctly.
INSERT INTO `login_attempts`(`user_id`, `time`, `failed`)
SELECT id, '', 3 FROM users WHERE username = 'pokemon'
INSERTing into a table from a SELECT does not require VALUES ( ... ). Here is an example of how you would use VALUES ( ... ):
INSERT INTO `login_attempts`(`user_id`, `time`, `failed`)
VALUES (1, '', 3)
Also, your sub query SELECT user_id FROM users WHERE username = 'pokemon','',3 the WHERE clause is invalid. Specifically the '',3 part which I assume is the values you wanted to insert for time and failed.
This will work....you have to add plain parentheses before and after statements.
INSERT INTO `login_attempts`(`user_id`, `time`, `failed`) VALUES ((SELECT user_id FROM users WHERE username = 'pokemon'),'',3)
