『PLSQL』在oracle表中怎樣創建自增長字段？

1.建立測試數據表
CREATE TABLE TEST
(
 ID NUMBER,
 NAME VARCHAR2(20),
 PRIMARY KEY(ID)
);

 

2.創建序列
CREATE SEQUENCE SEQ_TEST;

 

3.創建觸發器
CREATE OR REPLACE TRIGGER AUTOINCREMENT
BEFORE INSERT ON TEST
FOR EACH ROW
WHEN (NEW.ID IS NULL)
BEGIN
SELECT SEQ_TEST.NEXTVAL INTO :NEW.ID FROM DUAL;
END;
/

 

4.插入數據
INSERT INTO TEST(NAME) VALUES('NAME1');

 

5.查看插入結果
SELECT * FROM TEST;