巨噬细胞产生的主要细胞因子是A．IL-1B．IL-2C．IL-4D．IL-5E．IL-10

对于图书管理数据库，检索所有借阅了图书的读者姓名和所在单位。下面SQL语句正确的是______。 SELECT DISTINCT 姓名，单位 FROM 读者，借阅

A．WHERE 图书.总编号=借阅.总编号

B．WHERE 读者.借书证号=借阅.借书证号*

C．WHERE 总编号 IN(SELECT 借书证号 FROM 借阅)

D．WHERE 总编号 NOT IN(SELECT 借书证号 FROM 借阅)

A．(SELECT借书证号FROM借阅GROUPBY总编号HAVINGCOUNT(*)>=2)

B．(SELECT借书证号FROM读者GROUPBY借书证号HAVINGCOUNT(*)>=2)

C．(SELECT借书证号FROM借阅GROUPBY借书证号HAVINGSUM(*)>=2)

D．(SELECT借书证号FROM借阅GROUPBY借书证号HAVINGCOUNT(*)>=2)

A．(SELECT 借书证号 FROM 借阅 GROUP BY 总编号 HAVING COUNT(*)＞=2)

B．(SELECT 借书证号 FROM 读者 GROUP BY 借书证号 HAVING COUNT(*)＞=2)

C．(SELECT 借书证号 FROM 借阅 GROUP BY 借书证号 HAVING SUM(*)＞=2)

D．(SELECT 借书证号 FROM 借阅 GROUP BY 借书证号 HAVING COUNT(*)＞=2)

SELECT 姓名,单位 FROM 读者 WHERE 借书证号 IN;

设有图书管理数据库中包含以下表:

读者(借书证号C(4),单位C(8),姓名C(6),性别C(2),职称C(6),地址C(20))

借阅(借书证号C(4),总编号C(6),借书日期D(8))

A．SELECT 借书证号 FROM 读者 GROUP BY 借书证号 HAVING COUNT(*)>=2

B．(SELECT 借书证号 FROM 读者 GROUP BY 借书证号 HAVING COUNT(*)>=2)

C．SELECT 借书证号 FROM 借阅 GROUP BY 借书证号 HAVING COUNT(*)>=2

D．(SELECT 借书证号 FROM 借阅 GROUP BY 借书证号 HAVING COUNT(*)>=2)

A．(SELECT 借书证号 FROM 借阅 GROUP BY 总编号 HAVING COUNT(*)＞=2)

B．(SELECT 借书证号 FROM 读者 GROUP BY 借书证号 HAVING COUNT(*)＞=2)

C．(SELECT 借书证号 FROM 借阅 GROUP BY 借书证号 HAVING SUM(*)＞=2)

D．(SELECT 借书证号 FROM 借阅 GROUP BY 借书证号 HAVING COUNT(*)＞=2)

A．(SELECT 借书证号 FROM 借阅 GROUP BY 总编号 HAVING COUNT(*)＞=5)

B．(SELECT 借书证号 FROM 读者 GROUP BY 借书证号 HAVING COUNT(*)＞=5)

C．(SELECT 借书证号 FROM 借阅 GROUP BY 借书证号 HAVING SUM(*)＞=5)

D．(SELECT 借书证号 FROM 借阅 GROUP BY 借书证号 HAVING COUNT(*)＞=5)