【单选题】下面的SQL语句用于在SQL Server的PUBS数据库中查找所有住在California,并且收到的某本书的版税低于30%的第二作者的姓名,与之返回结果相等的SQL语句是( )。 SELECT au_lname, au_fname FROM authors WHERE state=’CA’ AND au_id IN (SELECT au_id FROM titleauthor...
A.
SELECT au_lname, au_fname FROM authors INNER JOIN titleauthor ON authors.au_id= titleauthor.au_id WHERE state=’CA’ AND royaltyper<30 AND au_ord=2
B.
SELECT au_lname, au_fname FROM authors UNION titleauthor ON authors.au_id= titleauthor.au_id WHERE state=’CA’ AND royaltyper<30 AND au_ord=2
C.
SELECT au_lname, au_fname FROM authors OUTTER JOIN titleauthor ON authors.au_id= titleauthor.au_id WHERE state=’CA’ AND royaltyper<30 AND au_ord=2
D.
SELECT au_lname, au_fname FROM authors CROSS JOIN titleauthor ON authors.au_id= titleauthor.au_id WHERE state=’CA’ AND royaltyper<30 AND au_ord=2
【单选题】电算化会计数据处理包括四个基本环节,其中( )是中心环节。
【单选题】关于戴手套,下列哪一项是错误的 ()
C.
处理传染病患者与可疑传染病患者污物时,戴手套
【单选题】The English, as a race, are very different from all other nationalities, including their closest neighbors, the French, Belgians and Dutch. It is claimed that living on an island separated from the re...
C.
the principle of behavior
【简答题】There is much chance_________ Bill will recover from his injury in the time for the race. [ ] A that B. which C.until D.if
【简答题】清除危石、危树、爆破作业有碍接触网及行车、人身安全时,应有()部门人员配合,先停电后作业。
【判断题】在电气化区段清除危石、危树,进行爆破作业有碍接触网及行车安全时,应有供电部门人员配合,先停电后作业。