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DB2 复制代码 代码如下: 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 ), ... ); Oracle(需要创建一个SEQUENCE和一个TRIGGER): 复制代码 代码如下: 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; MySQL 复制代码 代码如下: CREATE TABLE T1 ( id INT NOT NULL AUTO_INCREMENT, ... ); PostgreSQL 复制代码 代码如下: CREATE TABLE T1 ( id SERIAL NOT NULL, ... ); SQL Server 复制代码 代码如下: CREATE TABLE T1 ( id INT NOT NULL IDENTITY, ... ); Sybase 复制代码 代码如下: CREATE TABLE T1 ( id INT NOT NULL IDENTITY, ... ); |
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