MySQL是一款主流的關系型數據庫管理系統，可用于創建多對多關系圖。為了創建多對多關系圖，我們需要進行以下幾個步驟：

1. 創建表

CREATE TABLE `table1` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`name` VARCHAR(50) NOT NULL,
PRIMARY KEY (`id`)
);
CREATE TABLE `table2` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`name` VARCHAR(50) NOT NULL,
PRIMARY KEY (`id`)
);
CREATE TABLE `relationship` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`table1_id` INT(11) NOT NULL,
`table2_id` INT(11) NOT NULL,
PRIMARY KEY (`id`),
FOREIGN KEY (`table1_id`) REFERENCES `table1` (`id`),
FOREIGN KEY (`table2_id`) REFERENCES `table2` (`id`)
);

2. 插入數據

INSERT INTO `table1` (`name`) VALUES ('A');
INSERT INTO `table2` (`name`) VALUES ('X');
INSERT INTO `table2` (`name`) VALUES ('Y');
INSERT INTO `relationship` (`table1_id`, `table2_id`) VALUES (1, 1);
INSERT INTO `relationship` (`table1_id`, `table2_id`) VALUES (1, 2);

3. 查詢數據

SELECT table1.name AS table1_name, table2.name AS table2_name FROM relationship
JOIN table1 ON table1.id = relationship.table1_id
JOIN table2 ON table2.id = relationship.table2_id;

以上就是通過MySQL創建多對多關系圖的過程。通過這種方式，我們可以方便地建立表之間的多對多關系。