mysql8.0 提取json数据转为行
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:
SELECT
id,name,t.daystr as '日期',t.v as '成绩数据'
FROM
tableName 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"} |