What is the meaning of "HAVING" clause in Mysql?
A. To filter out the row values
B. To filter out the column values
C. To filter out the row and column values
D. None of the mentioned
Answer: Option A
Solution (By Examveda Team)
The HAVING clause in MySQL is used to filter groups of rows after they have been aggregated.Think of it like this:
1. GROUP BY gathers similar rows together (like all the people in a certain city).
2. HAVING then looks at those groups and only keeps the ones that meet certain conditions (like only keeping groups with more than 10 people).
Let's break down the options:
* Option A: To filter out the row values - This is partly true but incomplete. HAVING filters groups of rows, not individual rows. * Option B: To filter out the column values - This is incorrect. HAVING doesn't filter column values. * Option C: To filter out the row and column values - Incorrect. It focuses on groups of rows based on aggregate functions. * Option D: None of the mentioned - This is the closest, but not entirely accurate. HAVING does have a specific purpose.
In summary: HAVING is for filtering groups of rows after they've been aggregated with GROUP BY.
Related Questions on MySQL Miscellaneous
How is communication established with MySQL?
A. SQL
B. Network calls
C. A programming language like C++
D. APIs
Which type of database management system is MySQL?
A. Object-oriented
B. Hierarchical
C. Relational
D. Network
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