INSERT IGNORE into `user` (id,`name`,gender)
VALUES(1,"lgtest",2)
INSERT into `user` (id,`name`,gender)
VALUES(1,"lgtest1",23) ON DUPLICATE KEY UPDATE
`name`="lgtest1" , gender=23
SELECT * FROM `user`
REPLACE into `user` (id,`name`,gender)
VALUES(1,"lgtest",2)
INSERT into `user` (id,`name`,gender)
SELECT 1,"lgtest",23 FROM `user` WHERE NOT EXISTS (SELECT `name` FROM `user` WHERE `name` = 'lgtest')
CREATE TABLE `user` (
`id` int NOT NULL AUTO_INCREMENT,
`name` varchar(255) COLLATE utf8mb4_0900_as_ci DEFAULT NULL,
`gender` int DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `Index_gender_name` (`gender`,`name`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_as_ci