mysql数组定义数组

CREATE TABLE example (
    id INT AUTO_INCREMENT PRIMARY KEY,
    data JSON
);

INSERT INTO example (data) VALUES ('["apple", "banana", "cherry"]');

SELECT data->"$[1]" AS fruit FROM example;

CREATE TABLE example (
    id INT AUTO_INCREMENT PRIMARY KEY,
    data TEXT
);

INSERT INTO example (data) VALUES ('["apple", "banana", "cherry"]');

SELECT JSON_UNQUOTE(JSON_EXTRACT(data, '$[1]')) AS fruit FROM example;

CREATE TABLE main_table (
    id INT AUTO_INCREMENT PRIMARY KEY
);

CREATE TABLE array_table (
    id INT AUTO_INCREMENT PRIMARY KEY,
    main_id INT,
    value VARCHAR(255),
    FOREIGN KEY (main_id) REFERENCES main_table(id)
);

INSERT INTO main_table () VALUES ();
SET @main_id = LAST_INSERT_ID();
INSERT INTO array_table (main_id, value) VALUES (@main_id, 'apple'), (@main_id, 'banana'), (@main_id, 'cherry');

SELECT value FROM array_table WHERE main_id = @main_id;

ALTER TABLE example ADD INDEX idx_data (data);