⟩ Tell me what is a unique constraint?
Unique constraint is imposed on the column data to avoid duplicate values, but it will contain NULL values.
Question and Answer:
Home Data Modeling
- Share
Popular Answers:
* There is no answer to the above question yet.
More Questions for you:
How can you rebuild an index?
Explain what partitioning is and what its benefit is.
How can you gather statistics on a table?
You have just compiled a PL/SQL package but got errors, how would you view the errors?
How can you enable a trace for a session?
What is the difference between the SQL*Loader and IMPORT utilities?
What are the options available to refresh snapshots?
What is a database schema?
What is a SNAPSHOT LOG?
What is Distributed database?
