試験1z0-071-JPN トピック4 問題247 スレッド
Oracle 1z0-071-JPNのリアル試験問題集
問題 #: 247
トピック #: 4
問題 #: 247
トピック #: 4
どの2つのクエリが正常に実行されますか？
おすすめの解答：A,B,D,E 解答を投票する
The NULLIF and COALESCE functions in Oracle SQL serve specific purposes:
* Option A: Executes successfully. NULLIF returns NULL if the two arguments are equal; otherwise, it
* returns the first argument.
* Option B: Also correct. COALESCE returns the first non-null value among its arguments.
* Option C: This will not execute successfully because NULLIF requires both arguments to be of comparable data types. Comparing an integer to a character ('100' to 'A') is invalid.
* Option D: Executes successfully. NULLIF returns NULL because it compares NULL to a number, which is valid (though always yields NULL).
* Option E: Executes successfully. COALESCE accepts any data type as it returns the first non-null value, irrespective of type consistency among the arguments.
* Option A: Executes successfully. NULLIF returns NULL if the two arguments are equal; otherwise, it
* returns the first argument.
* Option B: Also correct. COALESCE returns the first non-null value among its arguments.
* Option C: This will not execute successfully because NULLIF requires both arguments to be of comparable data types. Comparing an integer to a character ('100' to 'A') is invalid.
* Option D: Executes successfully. NULLIF returns NULL because it compares NULL to a number, which is valid (though always yields NULL).
* Option E: Executes successfully. COALESCE accepts any data type as it returns the first non-null value, irrespective of type consistency among the arguments.
Nohara 2026-06-27 11:13:54
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