A WHERE clause in SQL is a data manipulation language statement.
WHERE clauses are not mandatory clauses of SQL DML statements. But it can be used to limit the number of rows affected by a SQL DML statement or returned by a query.
Actually. it filters the records. It returns only those queries which fulfill the specific conditions.
WHERE clause is used in SELECT, UPDATE, DELETE statement etc.
Let’s see the syntax for sql where:
- SELECT column1, column 2, … column n
- FROM table_name
- WHERE [conditions]
WHERE clause uses some conditional selection
|>=||greater than or equal|
|<=||less than or equal|
|< >||not equal to|