How to set an AUTO_INCREMENT field with to start with the value 6000 in mysql?

Question

如何在mysql中没有自动增量键设置字段自动增量或如何在mysql中设置字段自动增量为起始值6000？

Answer 1

... how set a field auto increment with start value 6000 in mysql?

If your table already exists:

ALTER TABLE your_table AUTO_INCREMENT = 6000;

If you are creating your table from scratch:

CREATE TABLE your_table () AUTO_INCREMENT = 6000;

Source and further reading:

• MySQL 5.1 Reference Manual :: Using AUTO_INCREMENT

---

Test case:

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 ('Jack');

SELECT * FROM users;
+---------+-------+
| user_id | name  |
+---------+-------+
|       1 | Bob   |
|       2 | Joe   |
|       3 | Paul  |
|    6000 | Keith |
|    6001 | Steve |
|    6002 | Jack  |
+---------+-------+
6 rows in set (0.01 sec)

Answer 2

ALTER TABLE tbl_name AUTO_INCREMENT = 6000

但请注意，此表中应该没有PK lager 6000！

Answer 3

mysql将为您显示正确的语法，如果对包含自动增量PK和某些数据的表执行以下操作，则会更多：

SHOW CREATE TABLE your_tablename;