[英]create table and set auto increment value in hbm file without alter the table
[英]SQL create table and set auto increment value without Alter table
例如,我正在創建下表:
CREATE TABLE人員(
ID int NOT NULL AUTO_INCREMENT,
LastName varchar(255)NOT NULL,
FirstName varchar(255),
地址varchar(255),
主要鑰匙(ID)
)
據我所知,自動增量的值可以通過這樣的Alter表修改
ALTER TABLE人員AUTO_INCREMENT = 100;
但我只是想知道有沒有辦法在創建表時設置自動增量的值?
像這樣的東西?
CREATE TABLE人員(
ID int NOT NULL AUTO_INCREMENT = 100,
LastName varchar(255)NOT NULL,
FirstName varchar(255),
地址varchar(255),
主要鑰匙(ID)
)
是的,您可以在創建表格時執行此操作
CREATE TABLE Persons (
ID int NOT NULL AUTO_INCREMENT,
LastName varchar(255) NOT NULL,
FirstName varchar(255),
Address varchar(255),
PRIMARY KEY (ID)
)AUTO_INCREMENT=100;
這是一個測試用例
mysql> CREATE TABLE Persons (
-> ID int NOT NULL AUTO_INCREMENT,
-> LastName varchar(255) NOT NULL,
-> FirstName varchar(255),
-> Address varchar(255),
-> PRIMARY KEY (ID)
-> )AUTO_INCREMENT=100;
Query OK, 0 rows affected (0.13 sec)
mysql> insert into Persons (LastName) values ('CCC');
Query OK, 1 row affected (0.03 sec)
mysql> select * from Persons ;
+-----+----------+-----------+---------+
| ID | LastName | FirstName | Address |
+-----+----------+-----------+---------+
| 100 | CCC | NULL | NULL |
+-----+----------+-----------+---------+
1 row in set (0.00 sec)
嘗試這個
CREATE TABLE Persons (
ID int NOT NULL AUTO_INCREMENT,
LastName varchar(255) NOT NULL,
FirstName varchar(255),
Address varchar(255),
PRIMARY KEY (ID)
)AUTO_INCREMENT=100;
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