SQL INTERVIEW QUESTIONS FOR FRESHER

SQL INTERVIEW QUESTIONS FOR FRESHER

1.What is DBMS? 2.What is RDBMS? 3.What is SQL? 4.What is a Database? 5.What are tables and Fields? 6.What is a primary key? 7.What is a unique key? 8.What is a foreign key? 9.What is a join? 10.What are the types of join and explain...

1.What is DBMS?
2.What is RDBMS? 3.What is SQL? 4.What is a Database? 5.What are tables and Fields? 6.What is a primary key? 7.What is a unique key? 8.What is a foreign key? 9.What is a join? 10.What are the types of join and explain each? 11.What is normalization? 12.What is Denormalization. 13.What are all the different normalizations? 14.What is a View? 15.What is an Index? 16.What are all the different types of indexes? 17.What is a Cursor? 18.What is a relationship and what are they? 19.What is a query? 20.What is subquery? 21.What are the types of subquery? 22.What is the difference between DELETE and TRUNCATE commands? 23.What are local and global variables and their differences? 24.What is a constraint? 25.What is data Integrity? 26.What is Auto Increment? 27.What is the difference between Cluster and Non-Cluster Index? 28.What is Datawarehouse? 29.What is Self-Join? 30.What is Cross-Join? 31.What is user defined functions? 32.What are all types of user defined functions? 33.What is Online Transaction Processing (OLTP)? 34.What is CLAUSE? 35.What is Union, minus and Interact commands? 36.What is an ALIAS command? 37.What is the difference between TRUNCATE and DROP statements? 38.What are aggregate and scalar functions? 39.How can you create an empty table from an existing table? 40.How to fetch common records from two tables? 41.Write a Query to display the total salary of all employees based on city whose average salary >= 23000? 42.Write a Query to display the total salary of employee based on dept_name? 43.Write a Query to display minimum & maximum salary of employee? 44.Write a Query to count the number of employees working in the company? 45.Write a Query to display minimum salary of an employee? 46.Explain UNION, MINUS, UNION ALL, INTERSECT ?

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