primary key sql
CREATE TABLE student
(
Roll integer (15) NOT NULL PRIMARY KEY,
Name varchar (255),
Class varchar (255),
Contact No varchar (255),
);primary key sql
CREATE TABLE student
(
Roll integer (15) NOT NULL PRIMARY KEY,
Name varchar (255),
Class varchar (255),
Contact No varchar (255),
);what is primary key
PRIMARY KEY -- unique identifier for the entire row of record in a table
-- can not be null and must be uniqueCopyright © 2021 Codeinu
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