更多"Which of the statements below is TR"的相关试题:
[单项选择]Which the following statements is true according to the passage
[多项选择]Examine these two statements:Which three are true about the MRKT tablespace?（）
A. The MRKT tablespace is created as a small file tablespace, because the file size is less than the minimum required for big file files.
B. The MRKT tablespace may be dropped if it has no contents.
C. Users who were using the old default tablespace will have their default tablespaces changed to the MRKT tablespace.
D. No more data files can be added to the tablespace.
E. The relative file number of the tablespace is not stored in rowids for the table rows that are stored in the MRKT tablespace.
[单项选择]Which of the statements is NOT true according to this passage
A. Parents should strengthen moral instruction.
B. Schools should help create a moral sense in children.
C. Law enforcement agencies should do more to help children understand laws.
D. Youth organizations play no role in building character.
[单项选择]Which of the statements is not true according to the passage
A. Placentia was the earliest palace with its windows made of glass in England.
B. The ships made at Greenwich are the best in the world.
C. Based on Flamsteed’s study Harrison made a clock.
D. Based on Flamsteed’s study, Harrison made a clock.
[多项选择]Which three statements about subqueries are true? （）
A. A main query can have more than one subquery.
B. A subquery can have more than one main query.
C. The subquery and main query must retrieve data from the same table.
D. The subquery and main query can retrieve data from different tables.
E. Only one column or expression can be compared between the subquery and main query.
F. Multiple columns or expression can be compared between the subquery and main query.
[多项选择]Which two statements about sequences are true? （）
A. You use a NEXTVAL pseudo column to look at the next possible value that would be generated from a sequence, without actually retrieving the value.
B. You use a CURRVAL pseudo column to look at the current value just generated from a sequence, without affecting the further values to be generated from the sequence.
C. You use a NEXTVAL pseudo column to obtain the next possible value from a sequence by actually retrieving the value from the sequence.
D. You use a CURRVAL pseudo column to generate a value from a sequence that would be used for a specified database column.
E. If a sequence starting from a value 100 and incremented by 1 is used by more then one application, then all of these applications could have a value of 105 assigned to their column whose value is being generated by the sequence.
F. You use REUSE clause when creating a sequence to restart the sequence once it generates the maximum value defined for the sequence.
[多项选择]Which two statements about views are true? （）
A. A view can be created as read only.
B. A view can be created as a join on two or more tables.
C. A view cannot have an ORDER BY clause in the SELECT statement.
D. A view cannot be created with a GROUP BY clause in the SELECT statement.
E. A view must have aliases defined for the column names in the SELECT statement.
[多项选择]Which two statements about subqueries are true? （）
A. A single row subquery can retrieve data from only one table.
B. A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
C. A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.
D. A single row subquery can retrieve data from more than one table.
E. A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
F. A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.
