mysql 如何将已存在的id值重新赋值 并按指定的某一值往上自增

比如 原有一万条数据 ID 我希望将ID重新按4000开始自增
2025-03-16 03:26:20
推荐回答(3个)
回答1:

前提,需保证设置了自增:
alter table table1 add id int auto_increment primary key

方式1,修改现有自增ID:
alter table users AUTO_INCREMENT=10000;

方式2,建表时指定:
CREATE TABLE TABLE_1 ( ID INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT, // ID列为无符号整型,该列值不可以为空,并不可以重复,而且自增。 NAME VARCHAR(5) NOT NULL ) AUTO_INCREMENT = 100;(ID列从100开始自增)

方式3,从默认值开始:

TRUNCATE TABLE table1

回答2:

两步

1.sql重设全部数据的id

update table t
set t.id = (
select @n := @n + 1 from (SELECT @n := 10000) r
)

2.重设表自增长起始位置

alter table users AUTO_INCREMENT=10001

回答3:

UPDATE 【table】 SET id=id+3999;

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