W3Schools SQL | #43 SQL CONSTRAINT 제약 조건

SQL Constraints

SQL Create Constraints

create table에 붙일 수 있는 constraints

CREATE TABLE table_name (
    column1 datatype constraint,
    column2 datatype constraint, 
    column3 datatype constraint
);

SQL Constraints

• NOT NULL
• UNIQUE
• PRIMARY KEY
• FOREIGN KEY
• CHECK
• DEFAULT
• CREATE INDEX