MySQL parsing json string related issues

In many cases, we need to parse the json string directly in sql. Here is a distinction based on the watershed of mysql5.7 version.

Check the MySQL version:

SELECT VERSION();

For mysql5.7 and above

Use MySQL's built-in function JSON_EXTRACT(column,'$.key'). This function has two parameters. The first parameter column represents the column name of the json column; the second parameter key represents a key in the json string.

SELECT JSON_EXTRACT('{"name":"张三","age":"18"}', '$.name') AS '姓名';

输出结果："张三"

 From the above results, there are more quotation marks in the obtained output result, so you need to consider introducing the JSON_UNQUOTE function, which is used to remove the quotation marks (" ") outside the obtained content

SELECT JSON_UNQUOTE(JSON_EXTRACT('{"name":"张三","age":"18"}', '$.name')) AS '姓名';

输出结果：张三

 

The above is a regular json string format. If a jsonArray is stored in a certain column, what should I do at this time? Then look down:

Examples: