Database views aresaved in the database as named queriesand can be used to save frequently used complex queries. Views arean excellent tool to restrict access to the datain such a way that a user can see and (sometimes) modify exactly what they need and no more. In the following VIEW,...
SQL Interview Questions and answers on Stored Procedures and Triggers What is a stored procedure? Stored Procedure is a function which contain collection of SQL Queries. Procedure can take inputs , process them and send back output. SQL INTERVIEW QUESTIONS AND ANSWERS 14 | P a g e 51.What ...
Following are some very important Complex SQL Queries Examples with answers. I have tried to explain each and every query in detail so that everyone will get idea of how it is executed step-by-step. In SQL and PL SQL interviews we require to know the key and important complex sql queries...
(Note: I created this test question based on a real SQL interview question that I heard from a friend, who applied at one of the biggest social media companies (name starts with ‘F.’ ;)) Solution of SQL Interview Question #1
SQL Interview Questions http://career.guru99.com/top-50-sql-question-answers/ 1. What is DBMS? A Database Management System (DBMS) is a program that controls creation, maintenance and use of a database. DBMS can be termed as File Manager that manages data in a database rather than ...
INTERSECT operator is used to return rows returned by both the queries.What is an ALIAS command?ALIAS name can be given to a table or column. This alias name can be referred in WHERE clause to identify the table or column.Example-. 1 Select st.StudentID, Ex.Result from student st, ...
12.What is Bit-map index?Explain with Example.(80 % Asked in PL SQL Interview Questions) Answer: 1.If Table contains the distinct values which are not more than 20 distinct values then user should go for Bit map indexes. 2.User should avoid the indexing on each and every row and do ...
We can check the current settings and thread allocation using the below queries. –Thread setting select max_workers_count from sys.dm_os_sys_info –Active threads select count(*) from sys.dm_os_threads Default value is 255. Increasing the number of worker threads may actually decrease the ...
SQL Job Interview Questions and Answers 1 :: What is SQL (Structured Query Language)? SQL is an English like language consisting of commands to store, retrieve, maintain & regulate access to your database.Read More 2 :: What is the SQL*Plus? SQL*Plus is an application that recognizes &...
Joins are used in queries to explain how different tables are related. Joins also let you select data from a table depending upon data from another table. Types of joins: INNER JOINs, OUTER JOINs, CROSS JOINs.OUTER JOINs are further classified as LEFT OUTER JOINS, RIGHT OUTER JOINS and FULL...