仅适用于mysql8.0，之前的版本不支持JSON_TABLE函数

数据结构:

id	name	jsonarr
1	张三	[{"daystr": "2023-12-01","score": "53"},{"daystr": "2023-12-02","score": "78"}]
2	李四	[{"daystr": "2023-12-01","score": "65"},{"daystr": "2023-12-02","score": "68"}]

SQL:

SELECTid,name,t.daystr as '日期',t.v as '成绩数据'
FROMtableName as temp,JSON_TABLE(temp.jsonarr,'$[*]' COLUMNS (daystr varchar(20) PATH '$.daystr ',v json PATH '$')) t 

查询结果：

id	name	日期	成绩数据
1	张三	2023-12-01	{"daystr": "2023-12-01","score": "53"}
1	张三	2023-12-02	{"daystr": "2023-12-02","score": "78"}
2	李四	2023-12-01	{"daystr": "2023-12-01","score": "65"}
2	李四	2023-12-02	{"daystr": "2023-12-02","score": "68"}