MySQL 如何设置一个AUTO_INCREMENT字段以在mysql中以值6000开头？
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How to set an AUTO_INCREMENT field with to start with the value 6000 in mysql?
提问by Ajay
How to set a field auto increment without auto increment key in mysql or how set a field auto increment with start value 6000 in mysql?
如何在mysql中设置没有自动增量键的字段自动增量或如何在mysql中设置一个起始值为6000的字段自动增量？
回答by Daniel Vassallo
... how set a field auto increment with start value 6000 in mysql?
...如何在mysql中设置起始值为6000的字段自动增量？
If your table already exists:
如果您的表已经存在：
ALTER TABLE your_table AUTO_INCREMENT = 6000;
If you are creating your table from scratch:
如果您从头开始创建表：
CREATE TABLE your_table () AUTO_INCREMENT = 6000;
Source and further reading:
来源和进一步阅读：
Test case:
测试用例：
CREATE TABLE users (
user_id int NOT NULL,
name varchar(50),
PRIMARY KEY (user_id)
);
INSERT INTO users VALUES (1, 'Bob');
INSERT INTO users VALUES (2, 'Joe');
INSERT INTO users VALUES (3, 'Paul');
ALTER TABLE users MODIFY user_id int NOT NULL AUTO_INCREMENT;
ALTER TABLE users AUTO_INCREMENT = 6000;
INSERT INTO users (name) VALUES ('Keith');
INSERT INTO users (name) VALUES ('Steve');
INSERT INTO users (name) VALUES ('Hyman');
SELECT * FROM users;
+---------+-------+
| user_id | name |
+---------+-------+
| 1 | Bob |
| 2 | Joe |
| 3 | Paul |
| 6000 | Keith |
| 6001 | Steve |
| 6002 | Hyman |
+---------+-------+
6 rows in set (0.01 sec)
回答by Rufinus
ALTER TABLE tbl_name AUTO_INCREMENT = 6000
but be aware you should have no PK lager 6000 in this table !
但请注意，此表中不应有 PK 啤酒 6000！
回答by Mark B
mysql will show you the correct syntax for this, and more, if you execute the following for a table that contains an auto increment PK & some data already:
mysql 将向您显示正确的语法，以及更多，如果您对包含自动增量 PK 和一些数据的表执行以下操作：
SHOW CREATE TABLE your_tablename;
