[Docs]: Update - Queries

[jnikhila]

Is there an existing issue for this?

• [X] I have searched the existing issues

Documentation Link

https://docs.appsmith.com/core-concepts/data-access-and-binding/querying-a-database

Discord/slack/intercom Link

https://theappsmith.slack.com/archives/C0341RERY4R/p1664167755129549

Describe the problem

The users often write queries that are not optimized and expensive for large data sets and impact the client's performance also.

Describe the improvement

Add tips to the documentation that will help users write efficient queries.

Why do you think this change is needed?

This is needed to guide the users in the right direction for writing optimized queries.