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?（）A、DB2 will no longer allow updating the value of IDCOL1 in TABLE1.B、When inserting a row in TABLE2, the only values that DB2 will allow for IDCOL2 are the existing values of IDCOL1.C、When inserting a row in TABLE2, DB2 will only allow foreign values for IDCOL2, that is values which do not exist in IDCOL1.D、When a SELECT statement joins TABLE1 with TABLE2, DB2 will automatically add the condition TABLE1.IDCOL1=TABLE2.IDCOL2 if not specified in the statement.
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?（）
- A、DB2 will no longer allow updating the value of IDCOL1 in TABLE1.
- B、When inserting a row in TABLE2, the only values that DB2 will allow for IDCOL2 are the existing values of IDCOL1.
- C、When inserting a row in TABLE2, DB2 will only allow foreign values for IDCOL2, that is values which do not exist in IDCOL1.
- D、When a SELECT statement joins TABLE1 with TABLE2, DB2 will automatically add the condition TABLE1.IDCOL1=TABLE2.IDCOL2 if not specified in the statement.
相关考题：
Which of the following is a performance optimization technology?（）A、QoSB、TrunkingC、SpanningD、VoIP
Which of the following utilities are used to choose which programs run at startup？ （）A、SFCB、SETDEBUGC、MSCONFIGD、REGEDIT
Which of the following commands will be run at a command prompt to determine which WindowsOS is running on the computer?（）A、VERB、Device ManagerC、VERIFYD、SET
单选题Which of the following technologies can improve convergence time following a link failure in a serviceprovider network？（）AMPLS TE FRBMPLS VPNCBFDDRSVPEVPLSFSNMP
单选题Which of the following is a hybrid network topology used for fault tolerance, in which all computersMUST connect to each other?（）AStarBRingCBusDMesh