Use mysqli extension technology to implement multiple data table queries. In the actual project development process, a project often requires multiple data tables to store information, and these tables are related to each other through primary keys. This article will introduce How to implement queries across multiple data tables. Well, in our previous article "How to use mysqli extension technology to view server connection error reports", we introduced the method of mysqli extension technology to view server connection error reports. Today we will introduce to you the use of mysqli extension technology to achieve multiple Query between tables! Technical points: Use mysqli technology to implement multi-table queries. The key is how to connect multiple tables through primary keys. The following is the code for implementing multi-table query in this example: $sql = "select * from student,score where student.id=score.id"; $result = mysqli_
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##Introduction: Use mysqli extension technology to implement multiple data table queries. In the actual project development process, a project often requires multiple data tables to store information, and these tables are related to each other through primary keys, so this article This article will introduce how to implement queries across multiple data tables. Well, in our previous article "How to use mysqli extension technology to view server connection error reports", we introduced the method of mysqli extension technology to view server connection error reports. Today we will introduce to you the use of mysqli extension technology to achieve multiple Query between tables! ...
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Use mysqli extension technology to implement multiple data table queries
##Introduction: In the actual project development process, a project often requires multiple data tables to store information, and these tables are related to each other through primary keys. This article will introduce how to implement multiple data tables. Query before data table.
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How to use mysqli extension technology to view server connection error reportsIntroduction: As the golden partner of PHP, the MySQL database plays a decisive role in the development process of PHP projects. This is not only because MySQL is completely free, but also is completely cross-platform like PHP. However, in the actual project development process, connection errors between PHP and the MySQL database are inevitable. This example will explain how to detect such connection errors as early as possible.
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