【单选题】- How’s your fish and chips? -- ________
【单选题】下列有关索引的说法,错误的是( )
A.
在SQL server 2012中创建主键约束时,一般会自动对主键涉及的列创建唯一聚集索引。
B.
在SQL server 2012中添加唯一约束时,默认将创建唯一聚集索引。
D.
如果一个表需要频繁更新数据,不应对它建立太多的非聚集索引。
【单选题】下列有关索引的说法,错误的是( )
A.
在聚集索引中,表中行的物理存储顺序与索引键的逻辑顺序相同。
【单选题】听力原文:M: How's your new job going? W: Not so well. I feel like a fish out of water in that job. Q: What does the woman mean? (13)
A.
She doesn't like the fishing industry.
C.
The fish is not fresh enough.
D.
She feels uncomfortable at work.
【多选题】有关索引的说法错误的是___________。
【多选题】有关索引的说法错误的是___________。
【单选题】听力原文:M: How's your new job going? W: well, I feel like a fish out of water in that job. Q: What can we infer from this conversation? (19)
A.
She doesn't like the fishing industry.
B.
The fish is not fresh enough.
D.
She feels uncomfortable at work.
【单选题】下列有关索引的说法,错误的是( )
B.
通过创建良好的索引,可以显著提高数据库查询和应用程序的性能。
C.
索引一旦创建,将由DBMS自动管理和维护。当操作数据时,DBMS会自动更新索引。
D.
一个表中创建的索引越多,数据库的整体性能提升越大。