Sub-queries return one value or list of values to the calling or main query. The query within the main query you can call it as a nested query. In my previous post, I have covered – How to Write a Subquery Quickly in SELECT Statement.
The use of WHERE (to filter rows), and DELETE a row very much common in sub-queries. So you can filter rows and delete a row. My examples will give you clear idea on how to write SQL queries. So that you can use in your projects today.
SQL WHERE and DELETE Using Sub-query
Subscribe to get access.
Read more of this content when you subscribe today.
These two ways limit the number of rows return from an SQL query. These are helpful for Oracle and other SQL developers.
Here are the reasons and resolution to fix the error Can’t Instantiate Abstract Class in Python.
AWS’s additional services let you understand the available services for various uses. The list helps you get a comprehensive idea quickly.
Download COBOL Tutorial