How do you optimize your SQL queries?

 How do you optimize your SQL queries?

Before doing that, you need first to understand the execution order.

create

update

deltete

dml commands

alter

drop

tcl commands

commit

rollback

dcl commands

grant

revoke

SQL query execution order refers to how the requirements evaluate the query clauses or how to optimize database search results. We use clauses in a specific order known as the SQL query execution order, similar to how we plan something step by step and arrive at the result.

Here is the order in which the SQL clauses are executed: 1. FROM - tables are joined to get the base data. 2. WHERE - the base data is filtered. 3. GROUP BY - the filtered base data is grouped. 4. HAVING - the grouped base data is filtered. 5. SELECT - the final data is returned. 6. ORDER BY - the final data is sorted. 7. LIMIT - the returned data is limited to row count. To learn more about SQL execution, check the article in the comments.

how to find the last id in sql table

how do you remove duplciates from table

joins on the following table

what is the difference between having and where in sql

explain about auto incriment in sql

set operator

give sql query to retrieve nth record from an aemployee table

explainj hot to get unique records without using the distinct keyword

joins