petchimuthu lingam wrote:
If i create foreign key references, whether it will improve the performance in the select query?
Foreign keys are used to create integrity in the database, it won't affect select performance.
eg: create table users ( userid int primary key, username text ); create table news ( newsid int primary key, created_by int references users(userid) );That means that a news item cannot be created by a userid that doesn't exist.
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