How it works a mysql query with alias?

Question

I\'m new in this comunnity and I need to work with a query that get data from a mysql database, I have this query, but I need to add a new table and I don\'t understand why the

Answer 1

Alias in MySQL query is like a temporary short name for your table. They are not necessarily to be used but save your time when you need to create a complex queries. They are mainly used in queries when you use try to fetch data more than 1 table in single query using JOINS.

Suppose you have a table name 'employee_records'. Then trying to fetch the fields for table would look employee_records.id and so on. If you use alias for table name say 'e', then selecting fields will become e.id.

Hope that will make your point clear. For more information in simple words read about SQL aliases over here - https://www.w3schools.com/sql/sql_alias.asp