Basic SQL Interview Questions Basic SQL Interview Questions 1. What is the use of DISTINCT in SELECT Statement? DISTINCT read more
Aggregate Functions in SQL1. What is the difference between WHERE clause and HAVING clause? Both WHERE and HAVING clause are read more
DB Locks in SQL1. What is a database lock in the context of SQL? When two sessions or users of database try to read more
Indexes in SQL Interview Questions1. What is an index? Index is a data structure which is created on one or more columns of the read more
Joins in SQL Interview QuestionsWhat is Join and Why it is required? Database is mainly composed of many tables. If we access any read more
Keys in SQLWhat is a key? Why do we need them in SQL? A database is composed of tables. Each table has lots of read more
Optimization in SQL1. What is Optimization? Optimization is part of RDBMS. It analyzes the query and tells the parser read more
Oracle in SQL1) What is oracle database? Oracle Database is developed on the basis of relational database read more
Parameterized Query in SQL1. Provide an example of SQL Injection? In simple words, SQL injection is the process of injecting read more
Privileges and Roles in SQL1. What is a privilege? Suppose we have created a table EMPLOYEES in the database. Now who can view read more
SQL Query Interview QuestionsLet us try to answer common interview questions using below two tables – Employee and Incentive read more
SQL Server Interview Questions1) What is SQL or Structured Query Language? SQL is a Structured Query Language used to communicate read more