[b]DB2
[/b]
CREATE TABLE T1
(
id INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1 INCREMENT BY 1 MINVALUE 1 NO MAXVALUE NO CYCLE NO CACHE ORDER ),
...
);
[b]Oracle（需要创建一个SEQUENCE和一个TRIGGER）：
[/b]
CREATE TABLE T1
(
id NUMBER(10,0) NOT NULL,
...
);
CREATE SEQUENCE T1_ID_SEQ INCREMENT BY 1 START WITH 1 NOMAXVALUE NOCYCLE CACHE 100 ORDER;
CREATE OR REPLACE TRIGGER INSERT_T1_ID
BEFORE INSERT ON T1
REFERENCING NEW AS new OLD AS old
FOR EACH ROW
BEGIN
SELECT T1_ID_SEQ.NEXTVAL INTO :new.id FROM DUAL;
END;
[b]MySQL
[/b]
CREATE TABLE T1
(
id INT NOT NULL AUTO_INCREMENT,
...
);
[b]PostgreSQL
[/b]
CREATE TABLE T1
(
id SERIAL NOT NULL,
...
);
[b]SQL Server
[/b]
CREATE TABLE T1
(
id INT NOT NULL IDENTITY,
...
);
[b]Sybase
[/b]
CREATE TABLE T1
(
id INT NOT NULL IDENTITY,
...
);
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