https://selfstudycp.blogspot.com/2021/09/sql-interview-questions.html -: Summary :- SQL > select sysdate , systimestamp from dual; SYSDATE SYSTIMESTAMP --------- --------------------------------------------------------------------------- 24 - NOV - 21 24 - NOV - 21 03 . 11.45 . 205000 PM + 05 : 30 convert Month no to Month Name: SQL > select TO_CHAR ( TO_DATE ( 2 , 'MM' ) , 'MONTH' ) from dual; TO_CHAR ( TO_DATE ( 2 , 'MM' ) , 'MONTH' ) ------------------------------------ FEBRUARY DDL(Data Defintion Language): create,Alter,Truncate,Rename,Drop,FlashBack,Purge,Comment Create: CREATE TABLE emp ( empNo Number ( 5 ),Ename varchar2 ( 20 ),Date_Of_Birth Date ,Sal Number ( 7 , 2 ) ); create table using existing tables (with data): create table...