Deleting Records

The delete statement is used to delete records or rows from the table.

delete from "tablename"

where "columnname"
OPERATOR "value"
[and|or "column"
OPERATOR "value"];

[ ] = optional

[The above example was line wrapped for better viewing on this Web page.]

Examples:

delete from employee;

Note: if you leave off the where clause, all records will be deleted!

delete from employee
where lastname = 'May';

delete from employee
where firstname = 'Mike' or firstname = 'Eric';

To delete an entire record/row from a table, enter "delete from" followed by the table name, followed by the where clause which contains the conditions to delete. If you leave off the where clause, all records will be deleted.

Delete statement exercises

(Use the select statement to verify your deletes):

  1. Jonie Weber-Williams just quit, remove her record from the table.
  2. It's time for budget cuts. Remove all employees who are making over 70000 dollars.

Create at least two of your own delete statements, and then issue a command to delete all records from the table.

Answers to exercises

SQL Interpreter

Share:
Home
Mobile Site | Full Site
Copyright 2017 © QuinStreet Inc. All Rights Reserved