【单选题】Two database users, Jack and Bill, are accessing the Certkiller STAFF table of the Certkiller DB database. When Jack modifies a value in the table, the new value is invisible to Bill. Which is the mo...
A.
The modified data are not available on disk.
B.
The modified data have been flushed out from memory.
C.
The modified rows of the Certkiller STAFF table have been locked.
D.
Jack has not committed the changes after modifying the value.
E.
Both users are accessing the database from two different machines.
【多选题】合成橡胶中可用于接触食品的橡胶制品主要有
【多选题】You are the administrator of a SQL Server 2000 database. You import a table of geographic information from a Microsoft access database into a SQL Server 2000 database. The table has 12,000 rows. Each ...
A.
Create a 60-MB data file named geography.ndf
B.
Create a 95-MB data file named geography.ndf
C.
Create a 60-MB data file named geography.mdf
D.
Create a 95-MB data file named geography.mdf
E.
Place the table in the PRIMARY filegroup.
F.
Place the table in a new filegroup named LOCATION.
【单选题】The database model that organizes information into tables of records that are connected to one another by linking a field in one table to a field in another table is called ________.
D.
object-oriented database
【单选题】调查问卷是市场调查基本的、有效的调查工具,调查问卷主要用于( )的搜集
【单选题】一个单片机的组成中,不是必须包含的模块是
【单选题】Two database users, Jack and Bill, are accessing the SupportCenter STAFF table of the SupportCenter DB database. When Jack modifies a value in the table, the new value is invisible to Bill. Which is t...
A.
The modified data are not available on disk.
B.
The modified data have been flushed out from memory.
C.
The modified rows of the SupportCenter STAFF table have been locked.
D.
Jack has not committed the changes after modifying the value.
E.
Both users are accessing the database from two different machines.
【单选题】合成橡胶中可用于接触食品的橡胶制品主要有哪些
E.
硅橡胶、丁基橡胶、乙丙橡胶、丁苯胶、丁腈胶、氯丁胶