查表 - 代码天地

1. 查询"红楼梦"目前可借的各图书编号，及所属版本信息。（是否借出为'否'的图书）

select D.ISBN,
D.BNAME as 书名
from BOOK B, BOOKDETAIL D
WHERE 
  D.isbn = B.Isbn
  AND B.B_ISBORROW = '否'
  AND D.BNAME = '红楼梦'

2、查找高等教育出版社的所有书目及单价，结果按单价降序排序。

select BD.ISBN,
BD.BNAME AS 书名,
bd.bprice as 价格
from BOOKDETAIL BD
WHERE BD.BPUBLISH ='人民出版社'
ORDER BY BD.BPRICE DESC

3、统计"红楼梦"各版的藏书数量（ISBN不同则版本不同）。

select B.ISBN,
COUNT(B.BID) AS 数量
from BOOKDETAIL BD, BOOK B
WHERE BD.BNAME = '红楼梦'
AND BD.ISBN = B.ISBN
GROUP BY B.ISBN

4、查询学号"20061234"号借书证借阅未还的图书的信息。

select BD.*
from BOOKDETAIL BD, BOOK B, LEND L
WHERE BD.ISBN = B.ISBN
AND B.B_ISBORROW = '是'
AND L.BID = B.BID
AND L.RID = '20061234'

5、查询各个出版社的图书最高单价、平均单价。

select 
BD.BPUBLISH,
MAX(BD.BPRICE) AS 最高价,
AVG(BD.BPRICE) AS 平均价
from BOOKDETAIL BD
GROUP BY BD.BPUBLISH

6、要查询借阅了两本和两本以上图书的读者的个人信息。

SELECT R.*
FROM READER R,
(select L.RID AS RID
from LEND L
GROUP BY L.RID
HAVING COUNT(*) >= 2) TEMP
WHERE R.RID = TEMP.RID

7、查询"王菲"的单位、所借图书的书名和借阅日期。

SELECT R.RDEPT AS 单位,
BD.BNAME AS 书名,
L.STARTDATE AS 借阅日期
FROM READER R, BOOK B, BOOKDETAIL BD, LEND L
WHERE B.ISBN = BD.ISBN
AND    L.BID = B.BID
AND    R.RID = L.RID
AND    R.RNAME = '王菲'

8、查询每类图书的册数和平均单价。

SELECT 
BD.CID,
COUNT(*),
AVG(BD.BPRICE)
FROM BOOKDETAIL BD, CAT C
WHERE BD.CID = C.CID 
GROUP BY BD.CID

9、统计从未借书的读者人数。

SELECT COUNT(*)
FROM READER R
WHERE R.RID NOT IN (
  SELECT L.RID
  FROM LEND L
)

10、统计参与借书的人数。

SELECT COUNT(*)
FROM READER R
WHERE R.RID IN (
  SELECT L.RID
  FROM LEND L
)

11、找出所有借书未还的读者的信息及所借图书编号及名称。

select BD.ISBN,
BD.BNAME,
R.*
from BOOKDETAIL BD, BOOK B, LEND L, READER R
WHERE L.RID = R.RID
AND B.B_ISBORROW = '是'
AND L.ENDDATE IS NULL
AND BD.ISBN = B.ISBN
AND L.BID = B.BID

12、检索书名是以"Internet"开头的所有图书的书名和作者。

我用数据开头好让能查一个数据出来

select BD.BNAME AS 书名,
BD.BAUTHER AS 作者
from BOOKDETAIL BD
WHERE REGEXP_LIKE(BD.BNAME, '数据')

13、查询各图书的罚款总数。

select BD.BNAME, F.FMONEY
from FINE F
LEFT JOIN LEND L 
ON L.FID = F.FID,
BOOK B,
BOOKDETAIL BD
WHERE F.FID = L.FID AND L.BID = B.BID AND BD.ISBN = B.ISBN

14、查询借阅及罚款分类信息，如果有罚款则显示借阅信息及罚款名称、罚金，如果没有罚款则罚款名称、罚金显示空（左外连接）

select L.*, F.FNAME, F.FMONEY
from LEND L
LEFT OUTER JOIN FINE F
ON L.FID = F.FID

15、查询借阅了所有"文学"类书目的读者的姓名、单位。

查表

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