问题
多项选择题
生育保险待遇包括（）
A.生育医疗费用
B.住院伙食补助费
C.交通食宿费
D.生育津贴
答案
参考答案：A, D
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生育保险待遇包括（）
A.生育医疗费用
B.住院伙食补助费
C.交通食宿费
D.生育津贴
参考答案：A, D
以下是PATIENT、PHYSICIAN和ADMISSION表的结果：
| PATIENT | ||
| PATIENT_ID | NUMBER | NOT NULL, Primary Key |
| LAST_NAME | VARCHAR2(30) | NOT NULL |
| FIRST_NAME | VARCHAR2(25) | NOT NULL |
| DOB | DATE | |
| INS_CODE | NUMBER | |
| PHYSICIAN | ||
| PHYSICIAN_ID | NUMBER | NOT NULL, Primary Key |
| LAST_NAME | VARCHAR2(30) | NOT NULL |
| FIRST_NAME | VARCHAR2(25) | NOT NULL |
| LICENSE_NO | NUMBER(7) | NOT NULL |
| HIRE_DATE | DATE | |
| ADHISSION | ||
| PATIENT_ID | NUMBER | NOT NULL, Primary Key, References PATIENT_ID column of the PATIENT table |
| PHYSICIAN_ID | NUMBER | NOT NULL, Primary Key, References PHYSICIAN_ID column of the PHYSICIAN table |
| ADMIT_DATE | DATE | |
| DISCHG_DATE | DATE | |
| ROOH_ID | NUHBER | Foreign key to ROOM_ID of the ROOM table |
A．一个分组函数
B．一个HAVING子句
C．一个MERGE语句
D．一个单行子查询