“check sql” Code Answer’s

sql constraint check value in list

sql by Breakable Barracuda on May 24 2020 Donate

ALTER TABLE <table>
ADD CONSTRAINT chk_val CHECK (col in ('yes','no','maybe'))

Source: stackoverflow.com

sql constraint check value in list

sql by Breakable Barracuda on May 24 2020 Donate

CREATE TABLE test(
    _id BIGINT PRIMARY KEY NOT NULL,
    decision NVARCHAR(5),
    CHECK (decision in ('yes','no','maybe'))
);

Source: stackoverflow.com

sql check

sql by DevLollo

on Jan 07 2021 Donate

Adds a constraint that limits the value which can be added to a column.
Example 1 (MySQL): Makes sure any users added to the users table are 18
or over.
CREATE TABLE users (
first_name varchar(255),
age int,
CHECK (age>=18)
);
Example 2 (MySQL): Adds a check after the table has already been
created.
ALTER TABLE users
ADD CHECK (age>=18);