Using default values on database columns helps to insulate database design issues from application code. Find out how to change a column's default value at a later date using a single command.

LESSON-5-LEARNING-MODULE LESSON 5: LEARNING MODULE: INTRO TO PL/SQL AND SQL IN ORACLE --Example 1 BEGIN DBMS_OUTPUT.PUT_LINE ('Lyca'); END; --Ques: What do you think DBMS_OUTPUT.PUT_LINE does?

On the surface, it may appear that the SQL clauses IN and EXISTS are interchangeable. However, they’re quite different in how they handle NULL values and may give different results. The problem ...