MySQL JSON 查询中的对象与数组技巧及查询示例

CREATE TABLE person (
    id INT PRIMARY KEY,
    info JSON
);
INSERT INTO person (id, info) VALUES (1, '{"name": "张三", "age": 30}');

SELECT * FROM person WHERE JSON_CONTAINS(info, '"张三"', '$.name');

SELECT * FROM person WHERE JSON_EXTRACT(info, '$.age') > 25;

JSON_TABLE(
    json_doc,
    path_expression
    COLUMNS(
        column_name column_type PATH json_path [on_empty] [on_error],
        ...
    )
) [AS] alias

SELECT *
FROM person,
JSON_TABLE(
    info,
    '$' COLUMNS(
        name VARCHAR(50) PATH '$.name',
        age INT PATH '$.age'
    )
) AS jt
WHERE jt.age > 25;

CREATE TABLE fruits (
    id INT PRIMARY KEY,
    fruits_array JSON
);
INSERT INTO fruits (id, fruits_array) VALUES (1, '["apple", "banana", "orange"]');

SELECT * FROM fruits WHERE JSON_CONTAINS(fruits_array, '"banana"');

SELECT * FROM fruits WHERE JSON_EXTRACT(fruits_array, '$[1]') = '"banana"';

JSON_TABLE(
    json_doc,
    path_expression
    COLUMNS(
        column_name column_type PATH json_path [on_empty] [on_error],
        ...
    )
) [AS] alias

SELECT *
FROM fruits,
JSON_TABLE(
    fruits_array,
    '$[*]' COLUMNS(
        fruit VARCHAR(50) PATH '$'
    )
) AS jt
WHERE jt.fruit = 'banana';