Oracle Certificate Profession 1Z0-051-04

LuiseDalian發表於2014-05-08
Oracle
（4）Which two statements are true regarding single row functions? (Choose two.)

A. They accept only a single argument.

B. They can be nested only to two levels.

C. Arguments can only be column values or constants.

D. They always return a single result row for every row of a queried table.

E. They can return a data type value different from the one that is referenced.

答案：（D、E）

解析：

B（X）單行函式可以巢狀任意層，而分組函式最多可以巢狀2層。

C（X）也可以是函式的返回值

來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/17013648/viewspace-1156382/，如需轉載，請註明出處，否則將追究法律責任。

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