Top 50 Interview Questions On SQL and PL/SQL. Today we will Discuss Top 50 interview questions and answers of SQL and PL/SQL which is frequently asked in interview. Question 1: What is SQL and Classification of SQL? Answer SQL is a Structure Query Language which is vastly used in RDBMS database like Oracle, Sybase, DB2 , Microsoft SQL server etc. Classification of SQL is as below: DDL (Data Definition Language): Commands are create , alter , drop , truncate etc DML (Data Manipulation Language) : Commands are insert,update and delete . TCL (Transaction Control Language ) : Commands are Commit , Rollback and Save point. DCL (Data Control Language) : Commands are Grant , Revoke Question 2: What is meant by Joins? What are the types of join? Answer Joins are basically used to extract/get data from multiple tables using s...
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