单选题which one of the following best describes the use of hidden column formula?()Aviews can be hidden based on a formula Bhidden columns are not a supported feature Ctable columns can be hidden based on a formula  Dview columns can be displayed or hidden based on a formula

单选题
which one of the following best describes the use of hidden column formula?()
A

views can be hidden based on a formula 

B

hidden columns are not a supported feature 

C

table columns can be hidden based on a formula  

D

view columns can be displayed or hidden based on a formula 


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单选题tommy has created a sales view in his sales.nsf database. Tommy wants negative numbers in the sales number column in the view parenthesis. which one of the following should tommy do?()Aselect the parenthesis when negative value in the view properties box Bselect the parenthesis when negative value in the column properties box Cuse the @function @negative to set this in the column formula in the view Duse a formula to format the value in the field on the form that will be displaying in the view

多选题You need to replicate a table from a master to a slave. The master and slave copies of the table will have different number of columns. Which two conditions must be true?()AEach extra column in the copy with more columns must not have a default valueBColumns that are common to both versions of the table must be defined in the same order on the master and the slaveCThe slave database cannot have more columns than the master. Only the master database can have more columnsDColumns that are common to both versions of the table must come first in the table definition, before any additional columns are additional columns are defined on either serverEThe master database cannot have more columns than the slave. Only the slave deatbase can have more columns

多选题Which two statements are true regarding views?()AA subquery that defines a view cannot include the GROUP BY clauseBA view that is created with the subquery having the DISTINCT keyword can be updatedCA view that is created with the subquery having the pseudo column ROWNUM keyword cannot be updatedDA data manipulation language (DML) operation can be performed on a view that is created with the subquery having all the NOT NULL columns of a table

单选题Which of the following is NOT true about XML columns?()AData can be retrieved by SQL.BData can be retrieved by XQuery.CXML columns must be altered to accommodate additional parent and child relationships.DAccess to any portion of an XML document can be direct, without reading the whole document.

单选题which one of the following best describes the use of hidden column formula?()Aviews can be hidden based on a formula Bhidden columns are not a supported feature Ctable columns can be hidden based on a formula  Dview columns can be displayed or hidden based on a formula