The WITH CHECK OPTION clause of the CREATE VIEW statement allows you to do which of thefollowing、

试卷相关题目

• 1Which database object provides an alternative way of describing data that exists in one or more base tables、

  A.Alias

  B.View

  C.Index

  D.Sequence

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• 2Which statement regarding referential integrity constraints is true、

  A.Multiple primary keys can be defined for a table.

  B.A foreign key can reference multiple primary keys.

  C.A primary key can be referenced by only one foreign key.

  D.Primary keys and foreign keys are used to define relationships.

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• 3Which type of table is best suited for recording results from application data manipulation that is not required to be persistent、

  A.Base Table

  B.Temporal Table

  C.Transition Table

  D.Temporary Table

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• 4Which statement about foreign keys is true、

  A.A table can have only one foreign key.

  B.Foreign keys can only be defined when a table is created.

  C.A foreign key can be defined on a column or a set of columns in a table.

  D.C. A foreign key can be defined on a column or a set of columns in a tabl

  E.D. Foreign keys are enforced only during the execution of INSERT statements.

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• 5What is a function of a table check constraint、

  A.To provide a method of avoiding duplicate entries for a column.

  B.To provide a method of ensuring a column's values are within a specific range.

  C.To ensure that XML columns are properly populated in an associated XML table space.

  D.To enforce relationships between tables by checking the existence of rows in one table against another.

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• 6Which type of constraint can be used to tell the DB2 Optimizer that a parent-child relationship exists between two tables, but that the relationship is not enforced、

  A.Check

  B.Unique

  C.Referential

  D.Informational

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• 7Which event will NOT cause a trigger to be fired、

  A.Execution of an INSERT statement.

  B.Execution of LOAD REPLACE operation.

  C.Execution of an INSERT operation of a MERGE statement.

  D.Execution of an UPDATE operation of a MERGE statement.

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• 8What is the primary purpose for using the INCLUDE clause with a CREATE UNIQUE INDEXstatement、

  A.To override the limit on index key columns.

  B.To further enforce the uniqueness of index values.

  C.To combine two or more indexes to create a single unique index.

  D.To improve performance of some queries by allowing index-only access.

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• 9What are INSTEAD OF triggers used for、

  A.To update data in other tables.

  B.To perform insert, update, and delete operations against complex views.

  C.To check or modify values before they are actually stored in a database.

  D.To run non-database operations that are coded in user-defined functions.

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• 10User USER1 wants to store part numbers and part descriptions in a table named PARTS; userUSER1 also wants to ensure that any comparisons of part descriptions that are made will be done so in binary, regardless of the database collating sequence used. Which statement should user USER1 execute to create the desired table、

  A.CREATE TABLE parts (part_no INTEGER, desc CLOB))

  B.CREATE TABLE parts (part_no INTEGER, desc VARCHAR(200))

  C.CREATE TABLE parts (part_no INTEGER, desc CLOB FOR BIT DATA))

  D.CREATE TABLE parts (part_no INTEGER, desc VARCHAR(200) FOR BIT DATA)

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