Inner Join and simple join both are same. Inner Join joins table in such a way that it only shows those results which matches the condition that is given and hide others. You can also fill your table so you can practice it. Now let us get started by joining these two tables. We will be using the same selectdata function which we have created in our crud.php file. Let us start by adding a new table in our database which will contain the message along with the user ID which have sent this message, we will name it messages. If this is the case with your query, I highly recommend breaking it into multiple queries to reduce the load on the server. However, note that JOIN statements could require a lot of server resources as the number of tables increases. How Many Tables can be Joined in MySQLĪccording to the official documentation of MySQL 8.0, the maximum number of tables in a JOIN statement is 61. To get the same results as the Outer Join, you need to join the Left Outer Join and Right Outer Join. Unlike SQL, MySQL does not consider the Outer Join as a separate Join type. On given keywords at that point, it chooses all rows from both tables, as long as there’s a coordinate between the columns in both tables. In MySQL, the Inner Join is the Default Join.
Using MySQL JOINs, you’ll be able to join more than two tables. MySQL Joins include: the MySQL Inner Join (also known as the Simple Join), the MySQL Left Outer Join (also called the Left Join, it returns matching records from the left table), the Right Join (this returns the matching records from the right table), and the Full Join (this returns matching records from the all tables). A MySQL Join is performed whenever two or more tables are joined in an SQL statement. MySQL Joins let you access data from multiple tables.
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