问题

Which of the following will be a conse

Which of the following will be a consequence of defining the column IDCOL2 in TABLE2 as a foreign key referencing the primary key (IDCOL1) of TABLE1?（）

ADB2 will no longer allow updating the value of IDCOL1 in TABLE1.
BWhen inserting a row in TABLE2, the only values that DB2 will allow for IDCOL2 are the existing values of IDCOL1.
CWhen inserting a row in TABLE2, DB2 will only allow foreign values for IDCOL2, that is values which do not exist in IDCOL1.
DWhen a SELECT statement joins TABLE1 with TABLE2, DB2 will automatically add the condition TABLE1.IDCOL1=TABLE2.IDCOL2 if not specified in the statement.

参考答案

参考解析：

分类：IBM(000-730)题库

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