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.
Sub-query Examples to use WHERE and DELETE
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The LISP and Prolog are popular in AI programming. However, you can use Python for AI programming too. This article gives you an idea Python’s strengths.
I have provided the resolution for ‘Missing IN or OUT parameter at index: 1’ in this post. Useful for all SQL developers.
Creating more indexes is a bad idea. This post covers how to answer this question in an interview. Just use unique indexes in where clause. So you can avoid creating more indexes.
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