Sometimes, there are requirements to delete the specific row that might be updated wrongly or the row is no longer needed. For example, pending transaction details.

DELETE statement used to delete the row from the table and frees up the memory that is utilized by the row till the deletion. We should all make a note that the deleted data, won't be recovered until or unless it is specified as recoverable.

Executing DELETE statement with WHERE clause deletes the matched rows from the table. So be cautious while using DELETE statement, it can end up by deleting the whole table data if you are not used WHERE clause.

DELETE FROM table_name WHERE condition; 

• table_name – Specifies the name of the table.

Let us consider below table(s) as an example table(s) to frame the SQL query for getting the desired results.

Scenario – Deleting a single row from existing table.

Requirement1 - Delete employee details from employee_details whose salary is 13000. The query was as follows –

DELETE FROM employee_details WHERE salary = 13000; 

By executing above query, we can delete an employee details whose salary is 13000 from employee_details. The remaining table was as follows –

Requirement2 - Deleting employee details from employee_details whose designation is "Director" AND employee id is 001. The query was as follows –

DELETE FROM employee_details WHERE designation = "Director"
AND emp_id = 001; 

By executing above query, we can delete an employee details whose designation is "Director" and emp_id is 001. The remaining table was as follows –

Requirement3 - Deleting employee details from employee_details whose date_of_hire ends with '09'. The query was as follows –

DELETE FROM employee_details WHERE date_of_hire LIKE '09'; 

By executing above query, we can get one employee details from employee_details whose date_of_hire end with '09'. The remaining table was as follows –