Suppose you want to select a database named 'sampledb' as the default database. Which of the following commands do you use?

A) USE sampledb

B) SELECT DATABASE()

C) SELECT DATABASE sampledb

D) USE DATABASE sampledb

Correct Answer : USE sampledb

Explanation : ‘USE sampledb’ selects sampledb as the default database. Initially, ‘SELECT DATABASE();’ command displays ‘NULL’, since no database is selected by default. The other two are not valid commands.