Exists

PostgreSQL WHERE EXISTS Query
PostgreSQL Using where EXISTS clause EXISTS clause is used with a subquery in a SQL statement. The output of EXISTS depends on the numbers of records ...
Laravel Checking If a Record Exists
How do you find out if a record already exists in a database if it doesn't insert a new record in laravel? How do you find out if a record already exi...
mysql if exists
How do I check if MySQL exists? What is exist in MySQL? Do not insert if exists MySQL? Where Not Exists my SQL? How do you check if a row already exis...