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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多选题Which three statements about subqueries are true?()AA single row subquery can retrieve only one column and one row.BA single row subquery can retrieve only one row but many columns.CA multiple row subquery can retrieve multiple rows and multiple columns.DA multiple row subquery can be compared by using the “” operator.EA single row subquery can use the IN operator.FA multiple row subquery can use the “=” operator.
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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