How to count duplicated values in a column in oracle?
What is an oracle user account?
You have one employee table having 3 entries emp_id, Mgr_id and salary. Mgr_id is also referencing emp_id. so now find out the emp_id which are having the second highest salary, under a particular manager.
What are the data types in oracle?
What is difference between Rename and Alias?
What is oracle rownum?
Database is hung. Old and new user connections alike hang on impact. What do you do? Your SYS SQLPLUS session IS able to connect.
If a table column has is UNIQUE and has NOT NULL, is it equivalent to a PRIMARY KEY column?
What is the difference between a user and a schema in oracle?
What is ADDM Advisor in Oracle?
What is redo log?
what is difference between cartesian join & cross join even they give same result?
How to rename a column in an existing table?