Database Administrator (DBA) Question: What is an index and How it is implemented in Oracle database? Database Administrator (DBA) Interview QuestionAnswer: INDEX is a one which provides quick access to a row. Previous QuestionNext QuestionWhat are the Coordination Properties in a Master-Detail relationship?Lot of users are accessing select sysdate from dual and they getting some millisecond differences. If we execute SELECT SYSDATE FROM EMP; what error will we get. Why?