小编给大家分享一下MySql手动获取自增主键的方法，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

mysql手动获取自增主键的方法：通过创建存储过程外加函数的方式维护一张sequences表来获取数据，代码为【last_number = last_number + increment_by】。

mysql手动获取自增主键的方法：

通过创建存储过程外加函数的方式维护一张sequences表来获取数据（一次解决终身受用）。

可以指定每次自增的大小，以及初始数。

select nextval('TESTDATA') AS batchIdCREATE DEFINER=`admin`@`%` FUNCTION `nextval`(seq_name VARCHAR (50)) RETURNS bigint(20)BEGIN UPDATE SEQUENCES SET last_number = last_number + increment_by WHERE sequence_name = seq_name; RETURN currval (seq_name);END;

CREATE DEFINER=`admin`@`%` FUNCTION `currval`(seq_name VARCHAR (50)) RETURNS bigint(20) NO SQLBEGIN SELECT last_number INTO @VALUE FROM SEQUENCES WHERE sequence_name = seq_name; RETURN @VALUE;END;

DROP TABLE IF EXISTS `sequences`;CREATE TABLE `sequences` ( `sequence_owner` varchar(30) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL, `sequence_name` varchar(30) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL, `min_value` bigint(20) NULL DEFAULT 1, `max_value` bigint(20) NULL DEFAULT NULL, `increment_by` bigint(20) NOT NULL DEFAULT 1, `cycle_flag` varchar(1) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NULL DEFAULT NULL, `order_flag` varchar(1) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NULL DEFAULT NULL, `cache_size` bigint(20) NOT NULL, `last_number` bigint(20) NOT NULL, PRIMARY KEY (`sequence_name`) USING BTREE, UNIQUE INDEX `sel`(`sequence_owner`, `sequence_name`) USING BTREE) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_bin ROW_FORMAT = Compact; -- ------------------------------ Records of sequences-- ----------------------------INSERT INTO `sequences` VALUES ('SCM', 'TESTDATA', 1, 9999999999, 1, 'N', 'Y', 20, 0);INSERT INTO `sequences` VALUES ('SCM', 'SEQ', 1, 9999999999, 1, 'N', 'N', 20, 0); SET FOREIGN_KEY_CHECKS = 1;

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