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Category: SQL Programming

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SQL Constraints

SQL constraints are set set of rules by which SQL engine enforces the integrity of database. Constraint maintains the standard rules to follow so that integrity in database can be maintained. If there is...

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SQL CROSS JOIN

SQL CROSS JOIN returns all records where each row from the first table is combined with each row of the second table. CROSS JOIN returns the Cartesian product of the tables involved in join if...

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SQL FULL JOIN

SQL FULL JOIN returns all the rows from the left table and all the rows from the right table. If there are no matching values in either of the tables then non-matching values returned as NULL....

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SQL RIGHT JOIN

SQL RIGHT JOIN returns all the rows from the right table mentioned with the RIGHT JOIN clause. If there are no matching rows in left table then output rows will return NULL values. Syntax SELECT...

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SQL LEFT JOIN

SQL LEFT JOIN returns all the rows from the left table mentioned with the LEFT JOIN clause. If there are no matching rows in right table then output rows will return NULL values. Syntax SELECT...