MySQL INNER JOIN

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The INNER JOIN keyword selects records that have matching values in both tables.


SELECT column_name(s)
FROM table1
INNER JOIN table2
ON table1.column_name = table2.column_name;

We've a table named Students and Teachers in our database that contains the following records:

TECH_NO	TECH_NAME	SUBJECT	ROLL_NO
20	Kayla	PHP	6
21	Albert	Java	4
21	Albert	Java	5
22	Helen	Node.js	3
23	Anne	Python	2
24	Jaime	C++	1

Then, we can create the following MySQL statement (that contains an INNER JOIN), that selects records that have matching values in both tables:


SELECT Teachers.TECH_NO, Teachers.NAME, Students.ROLL_NO
FROM Teachers
INNER JOIN Students ON Teachers.TECH_NO=Students.ROLL_NO;

Now, after executing the above MySQL statement,

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MySQL - INNER JOIN