Left join and right join in MySQL - Code World

Left join and right join in MySQL

Enterprise 2023-09-09 06:22:21 views: null

A left join uses the left table as the main table and joins all the records in the left table with the matching records in the right table. If the right table does not have matching records in the left table, it will be displayed as a NULL value.

The same applies to right join, generally speaking, left join is used.

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Origin blog.csdn.net/weixin_54620350/article/details/131875485

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