mysql where value is null
SELECT *
FROM contacts
WHERE last_name IS NULL;mysql where value is null
SELECT *
FROM contacts
WHERE last_name IS NULL;set column to not null mysql
ALTER TABLE Person MODIFY P_Id INT(11) NOT NULL;mysql set value as null
UPDATE table SET field = NULL WHERE something = somethingmysql on delete set null
FOREIGN KEY (child_col1, child_col2, ... child_col_n)
REFERENCES parent_table (parent_col1, parent_col2, ... parent_col_n)
ON DELETE SET NULL
[ ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT } ]Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
