oracle默認值not null，插入的時候不能賦null，不然會報錯

SELECT * FROM OBD_DATA;

CREATE TABLE AAA_Huch
(
StudentID varchar2(50) primary key,
StudentName varchar2(50) default '' not null
);

SELECT * FROM AAA_HUCH;

--因爲StudentName是not null，插入的時候不能賦null，不然會報錯
INSERT INTO AAA_Huch(StudentID)
VALUES('AA');

--也不能這樣
INSERT INTO AAA_Huch(StudentID,StudentName)
VALUES('AA',NULL);

--這樣也會報錯，oracle中''會當成null處理
INSERT INTO AAA_Huch(StudentID,StudentName)
VALUES('bb','');

--只能這樣，插入一個空格符
INSERT INTO AAA_Huch(StudentID,StudentName)
VALUES('bb',' ');

alter table aaa_huch
add sex int default 0;

INSERT INTO AAA_Huch(StudentID,StudentName)
VALUES('cc','cc');

select * from alarm_info;