在oracle里使用自增ID字段的步驟比較繁瑣，總結(jié)如下：
-- 創(chuàng)建表
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CREATE TABLE ADVICE(ID INT NOT NULL,ACTIVE INT DEFAULT 1 NOT NULL,TYPE INT NOT NULL, MSG VARCHAR2(512) NOT NULL,ADVICE VARCHAR2(4000) NOT NULL,PRIMARY KEY(ID),CONSTRAINT ADVICE_UNI UNIQUE(TYPE,MSG))TABLESPACE MYDB;--創(chuàng)建自增ID，名稱為：表名_字段名_SEQCREATE SEQUENCE ADVICE_ID_SEQ MINVALUE 1 NOMAXVALUE INCREMENT BY 1 START WITH 1 NOCACHE;-- 為Insert操作創(chuàng)建觸發(fā)器，無需在SQL語句里寫NEXTVAL，名稱為表名_INS_TRGCREATE OR REPLACE TRIGGER ADVICE_INS_TRG BEFORE INSERT ON ADVICE FOR EACH ROW WHEN(NEW.ID IS NULL)BEGINSELECT ADVICE_ID_SEQ.NEXTVAL INTO :NEW.ID FROM DUAL;END; |
