Download Android App in your Android Device from Google Play Store
- Search for "Withoutbook Practice Exam Test" in Mobile/Tablet Play Store
Practice InterviewNew Search by Name or Email

Exams Attended

Make Homepage

Bookmark this page

Subscribe Email Address

SQL Interview Questions and Answers

Ques 91. How will you activate/deactivate integrity constraints?

Ans. The integrity constraints can be enabled or disabled by ALTER TABLE ENABLE CONSTRAINT / DISABLE CONSTRAINT.

Is it helpful? Add Comment View Comments
Ques 92. If unique key constraint on DATE column is created, will it validate the rows that are inserted with SYSDATE?
Ans. It won't, Because SYSDATE format contains time attached with it.
Is it helpful? Add Comment View Comments
Ques 93. What is a database link?
Ans. Database link is a named path through which a remote database can be accessed.
Is it helpful? Add Comment View Comments
Ques 94. How to access the current value and next value from a sequence? Is it possible to access the current value in a session before accessing next value?
Ans.
Sequence name CURRVAL, sequence name NEXTVAL. It is not possible. Only if you access next value in the session, current value can be accessed.
Is it helpful? Add Comment View Comments
Ques 95. What is CYCLE/NO CYCLE in a Sequence?
Ans. CYCLE specifies that the sequence continue to generate values after reaching either maximum or minimum value. After pan-ascending sequence reaches its maximum value, it generates its minimum value. After a descending sequence reaches its minimum, it generates its maximum.
NO CYCLE specifies that the sequence cannot generate more values after reaching its maximum or minimum value.
Is it helpful? Add Comment View Comments

Most helpful rated by users:

©2019 WithoutBook