A.COALESCE

B.REPLACE

C.NVL

D.ISNULL

A.ALTER

B.INSERT

C.UPDATE

D.SELECT

A.Retrieves the next value in a sequence and increments the sequence

B.Deletes the sequence from the database

C.Resets the sequence to its starting value

D.Retrieves the current value of a sequence without incrementing it

A.To improve the performance of data retrieval queries

B.To ensure uniqueness of values in a column

C.To enforce data integrity constraints

D.To store metadata about a table

A.DELETE INDEX

B.DROP INDEX

C.REMOVE INDEX

D.TRUNCATE INDEX