Given the following DDL statement: CREATE TABLE sales (item CHAR(20)); If a DBA wishes toincrease the size of the ITEM column, which SQL statement needs to be used、

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• 1If the following command is executed: CREATE DATABASE test What is the page size (in kilobytes) of the database、

  A.4

  B.8

  C.16

  D.32

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• 2Which DB2 object can be used to improve the execution performance of qualified SELECT statements、

  A.Trigger

  B.SQL Procedure

  C.Sequence Object

  D.Materialized Query Table

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• 3When is it appropriate to use a sequence、

  A.When you want to control the order in which triggers are fired.

  B.When you want to control the order in which stored procedures can be invoked.

  C.When you want to automatically generate a numeric value that is not tied to any specific column or table.

  D.B. When you want to control the order in which stored procedures can be invoked.C. When you want to automatically generate a numeric value that is not tied to any specific column or tabl

  E.D. When you want to automatically generate a numeric value for each row that is added to a specific table.

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• 4Which clause should be included in a ALTER TABLE statement to update a table definition with a new column、

  A.ADD COLUMN

  B.ALTER COLUMN

  C.APPEND COLUMN

  D.RENAME COLUMN

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• 5Which object is a stored procedure defined into、

  A.Table

  B.Schema

  C.Package

  D.Database

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• 6Which action needs to be performed in order to complete the definition of an application-period temporal table、

  A.A transaction-start-id column must be defined for the table.

  B.A history table must be defined and associated with the base table.

  C.A BUSINESS_TIME period must be specified in a CREATE or ALTER of the table.

  D.A unique index must be created that prevents overlapping of the BUSINESS_TIME period of the tabl

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