6/20/2023 0 Comments Mysql concat![]() MySQL Official documentation of GROUP_CONCAT() Function. We urge you to try multiple examples of the GROUP_CONCAT() function on your own and use it in your applications. It’s a beneficial function provided by MySQL that makes your task easier to group up the row values without writing nested queries or logical programs. In this tutorial, we have learned what GROUP_CONCAT() aggregate function is, its syntax, its usage, and how to combine it with other aggregate functions. The following is the syntax for changing group_concat_max_len’s value at runtime, where Val is an unsigned integer: SET group_concat_max_len = val Code language: SQL (Structured Query Language) ( sql ) Conclusion Although the value of max_allowed_packet binds the effective maximum length of the return value, the value can be increased higher. Note- The result is clipped to the maximum length specified by the system variable group_concat_max_len, whose default value is 1024. We will have only one table here so that we can focus on the functionality of our topic without getting dragged away. There can be multiple subjects related to a single student, and there are records of multiple students. Examples of MySQL GROUP_CONCAT() Functionįirst, we will create a table of three attributes: id, subject, and student name. We will start from a simple example and then head towards a complex one. Now let’s see some examples of the GROUP_CONCAT() function. Note- The square brackets ( ) are used to represent optional parameters. By default, values in string are seperated by comma (,) operator.
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