"sql check" Code Answer's
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sql constraint check value in list
ALTER TABLE <table>
ADD CONSTRAINT chk_val CHECK (col in ('yes','no','maybe'))
Source: stackoverflow.com
sql constraint check value in list
CREATE TABLE test(
_id BIGINT PRIMARY KEY NOT NULL,
decision NVARCHAR(5),
CHECK (decision in ('yes','no','maybe'))
);
Source: stackoverflow.com
sql query checker
CREATE TABLE employee
( employee_id VARCHAR(20),
Name VARCHAR (20),
Address VARCHAR (20),
Mobile_no SMALLINT);
sql check
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);
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