Whether you are a beginner or an experienced professional, it is important to be well-prepared for SQL queries-based interview questions. In this article we will see top 70+ SQL interview questions and answers which include basic, advanced, technical, and scenario based questions asked by ...
PL/SQL (Procedural Language/SQL) is basically a procedural extension of Oracle – SQL. PL/SQL helps the user to develop complex database applications using control structures, procedures, functions, modules, etc. This article will discuss the top-most PL/SQL interview question and answers. Table...
If you create a composite (multi-column) index, the orders of the columns in the key are very important. Try to order the columns in the key as to enhance selectivity, with the most selective columns to the leftmost of the key.
MERGE JOIN is the most important join in SQL Server. In MERGE JOIN, your query plan is an effective query plan and you don’t need to make many changes to improve query performance. As because the MERGE JOIN operator uses ordered data entry, it can use two large data sets. 16, Can ...
i will try to explain most important PL/SQL Interview Questions that may ask in interview.PL/SQL is the Procedural Language Structured Query Language which will use to add the business logic. In this article I will try to give the brief description about different PL/SQL interview questions. ...
This 4 hour 40 minute long free Udemy course is an essential course and starts with SQL, so if you know SQL already, then you may feel bored with the slow pace of the course. It's not the best of the Oracle course you will see, but the most important thing is it's free and pro...
Hello All, I have been collecting interview questions from the people who given interviews at various organizations. Below are the list of questions. It includes, SQL DBA, MSBI, SQL Developer, SQL Server. 1 SSRS: 1. How to render a report to a user email?
3 to_char(sysdate,'sssss') "Seconds" 4 from dual; SystemTime Seconds --- --- 11:34:50 41750 Video for Complex sql queries : Register for free and Get Complex SQL Interview Questions PDF : Submit FOR ISSUES CONTACT : compexsql@gmail.com...
Some of the most commonly used and important SQL commands are: SELECT - To extract data from a database. INSERT INTO - To insert new data into a database. UPDATE - To update data in a database. DELETE - To delete data from a database. CREATE TABLE - To create a new table...
This tutorial explains the most important and frequently asked (faqs) Oracle Wait Events interview questions and answers such as What is the connection between wait events and database performance, How can I access wait event information, What are idle e