What is the difference between COUNT (*), COUNT (expression), COUNT (distinct expression) ?
What is the difference between COUNT (*), COUNT (expression), COUNT (distinct expression) ?
What is the difference between COUNT (*), COUNT (expression), COUNT (distinct expression) ?
More Questions
41 . What is the difference between COUNT (*), COUNT (expression), COUNT (distinct expression)?
42 . Difference between the “VERIFY” and “FEEDBACK” command?
43 . List out the difference between Commit, Rollback, and Savepoint?
44 . What is the difference between SUBSTR and INSTR?
45 . Point out the difference between USER TABLES and DATA DICTIONARY?
46 . Major difference between Truncate and Delete?
47 . Point the difference between TRANSLATE and REPLACE?
48 . What is the difference between $ORACLE_BASE and $ORACLE_HOME?
49 . What do you understand by Redo Log file mirroring?
50 . What is the difference between a hot backup and a cold backup in Oracle? Explain about their benefits as well