Exercises on usage of INSERT, UPDATE, DELETE, and MERGE statements

  Here you can practice in solving exercises on data modification (which in combination with SELECT statement present Data Manipulation Language - SQL DML). These tasks are included in the first certification stage, however, they are unaccessible without registration because of calculating time spent on solving each exercise in the same manner as it has been done for the second testing stage on SELECT statement.
  On this page it is possible to carry out any DML statements addressed to the learning databases including SELECT statement. In the later case, the correctness of the solution will not be accomplished, so the "without check" checkbox is checked automatically. For order any certificate, you should solve all the exercises of this section. More about certification.