多项选择题

Which three statements are true regarding single-row functions？（）

A. They can accept only one argument.
B. They can be nested up to only two levels.
C. They can return multiple values of more than one data type.
D. They can be used in SELECT， WHERE， and ORDER BY clauses.
E. They can modify the data type of the argument that is referenced.
F. They can accept a column name， expression， variable name， or a user-supplied constant as arguments.

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热门试题

多项选择题WhichthreetaskscanbeperformedusingregularexpressionsupportinOracleDatabase10g？（）

A. it can be used to concatenate two strings.
B. it can be used to find out the total length of the string.
C. it can be used for string manipulation and searching operations.
D. it can be used to format the output for a column or expression having string data.
E. it can be used to find and replace operations for a column or expression having string data.

单项选择题EMPDET is an external table containing the columns EMPNO and ENAME. Which command would work in relation to the EMPDET table？（）

A.A
B.B
C.C
D.D

多项选择题WhichthreepossiblevaluescanbesetfortheTIME_ZONEsessionparameterbyusingtheALTERSESSIONcommand？（）

A. ’os’
B. local
C. -8：00’
D. dbtimezone Li
E. ’Australia’