What is subquery in SQL

0 votes
Hi!!

Can someone tell me what a subquery is in SQL?
Oct 12, 2018 in Database by DataKing99
• 8,240 points
827 views

1 answer to this question.

0 votes

A subquery is a query inside another query where a query is defined to retrieve data or information back from the database. In a subquery, the outer query is called as the main query whereas the inner query is called subquery. Subqueries are always executed first and the result of the subquery is passed on to the main query. It can be nested inside a SELECT, UPDATE or any other query. A subquery can also use any comparison operators such as >,< or =.

answered Oct 12, 2018 by DataKing99
• 8,240 points

Related Questions In Database

0 votes
1 answer

What is an index in SQL?

An index is used to speed up ...READ MORE

answered Feb 3 in Database by Vaani
• 5,040 points
29 views
0 votes
1 answer

What is the definition of cardinality in SQL?

Cardinality is defined as the "number of ...READ MORE

answered Feb 15 in Database by Neha
• 6,260 points
84 views
0 votes
1 answer

What is the difference between HAVING and WHERE in SQL?

HAVING: It is used to check after the aggregation ...READ MORE

answered Feb 17 in Database by Vaani
• 5,040 points
31 views
0 votes
0 answers

What is the definition of cardinality in SQL?

My book definition of Database Systems does ...READ MORE

Feb 18 in Database by Neha
• 6,260 points
75 views
0 votes
1 answer

Which query to use for better performance, join in SQL or using Dataset API?

DataFrames and SparkSQL performed almost about the ...READ MORE

answered Apr 19, 2018 in Apache Spark by kurt_cobain
• 9,390 points
932 views
0 votes
1 answer

How to connect Java program to the MySQL database?

You can connect your Java code with ...READ MORE

answered May 11, 2018 in Java by Parth
• 4,630 points
851 views
0 votes
1 answer
0 votes
1 answer

Automating Oracle script with nolio

Depending upon the details of your script ...READ MORE

answered Jul 17, 2018 in Other DevOps Questions by ajs3033
• 7,280 points
312 views
0 votes
1 answer

What are the manipulation functions in SQL?

There are three case manipulation functions in ...READ MORE

answered Oct 11, 2018 in Database by DataKing99
• 8,240 points
3,156 views
0 votes
1 answer

What is a Join in terms of database?

JOINS are used to combine rows from ...READ MORE

answered Nov 13, 2018 in Database by DataKing99
• 8,240 points
348 views
webinar REGISTER FOR FREE WEBINAR X
Send OTP
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP