How to join multiple tables in MySQL || MySQL Joins || Code With Neha

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In my previous video of mysql series I have given a brief overview about Joins in mysql and how to simply join 2 tables in mysql
You can check the video from the above I button

Today I am going to show how to join 3 or more tables in mysql
So without any further delay let's get started

Today I am referring to a database named employee_info

Within employee_info database
There are 3 tables named employee,department and manager

Here in employee table emp_no is primary key
In department table dept_num is the primary key and dept_name is the foreign key
In manager table manager_id is the primary key and dept_num is foreign key

So let the query be to fetch emp_no,emp_name ,emp_address,dept_name,dept_city,dept_num and manager_name in one table

This can be done in 2 ways
1st by using joins

In this case we will select whatever we want to print

First write select leave spaces for the columns we want to print
From employee alias e
Join department alias d on that is the common attribute between this 2 tables so

Then write the columns we want to print that is

Select emp_no,emp_name ,emp_address,dept_name,dept_city,dept_num
From employee e

Run the query to see the result
So 1st we are joining first 2 tables

Modify the same query
Now we will join 3rd table
So inner join manager m
Now add another column manager name in select statement

Run the query to see the result

2nd method is parent_child relationship

Again select leave blank spaces for the required column output
From employee e,department d,manager m

Write the required columns in select statement
Run the query to see the result

that's all for today Hope you all will get some help from this video
If it's so then don't forget to subscribe my channel Code with Neha and press the Bell Icon for Regular Updates
See you in the next video till then Stay Safe Stay Happy

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Chomotkar ekta video! 🙏 Multiple table JOIN korar byapar ta niye khub confusion chilo. Kintu apni eto sohoj bhabe bujhiye dilen, concept ta ekkebare clear hoye geche. Office-er kaaj e khub subidha hobe ebar. Onek dhonnobad!

BDishaa
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