EMPLOYEE表:使用比甲骨文少比较日期不能得到预期的答案
CREATE TABLE Employee(
ID CHAR(10) PRIMARY KEY,
SSN CHAR(15) NOT NULL,
FNAME CHAR(15),
LNAME CHAR(15),
DOB DATE NOT NULL
);
INSERT INTO Employee VALUES('0000000001','078-05-1120','George','Brooks', '24-may-85');
INSERT INTO Employee VALUES('0000000002','917-34-6302','David','Adams', '01-apr-63');
INSERT INTO Employee VALUES('0000000003','078-05-1123','Yiling','Zhang', '02-feb-66');
INSERT INTO Employee VALUES('0000000004','078-05-1130','David','Gajos', '10-feb-65');
INSERT INTO Employee VALUES('0000000005','079-04-1120','Steven','Cox', '11-feb-79');
INSERT INTO Employee VALUES('0000000006','378-35-1108','Eddie','Gortler', '30-may-76');
INSERT INTO Employee VALUES('0000000007','278-05-1120','Henry','Kung', '22-may-81');
INSERT INTO Employee VALUES('0000000008','348-75-1450','Harry','Leitner', '29-oct-85');
INSERT INTO Employee VALUES('0000000009','256-90-4576','David','Malan', '14-oct-88');
INSERT INTO Employee VALUES('0000000010','025-45-1111','John','Brooks', '28-nov-78');
INSERT INTO Employee VALUES('0000000011','025-59-1919','Michael','Morrisett', '04-nov-85');
INSERT INTO Employee VALUES('0000000012','567-45-2351','David','Nelson', '10-nov-54');
INSERT INTO Employee VALUES('0000000013','100-40-0011','Jelani','Parkes', '20-dec-44');
当我使用类似的查询:
SELECT * FROM EMPLOYEE WHERE DOB < '01-jan-80';
我没有得到的“0000000013”的记录, '100-40-0011','Jelani','Parkes','20 -dec-44'。 我认为这可能是日期格式问题,但我不确定。任何人有想法?谢谢!