RE: How do they get the answer?

From: Libal, Ivo <ivo.libal_at_knapp-systems.com>
Date: Wed, 22 Aug 2001 02:33:47 -0700
Message-ID: <F001.00373921.20010822023134@fatcity.com>

I thing that the answer should
be
 
E) At
least two teachers will receive a 10% salary increase.
<FONT
face="MS Sans Serif" size=1><FONT face="MS Sans Serif" size=1> 
<FONT
face="MS Sans Serif" size=1>Think if there are the same 2 teachers for class 102,105....
<SPAN
class=008533209-22082001> 
<FONT
face="MS Sans Serif" size=1>Ivo
 From: Stephen
Andert [mailto:StephenAndert_at_firsthealth.com]Sent: Tuesday, August 21, 2001 06:57 PMTo: Multiple recipients of list ORACLE-LSubject: Re: How do they get the answer?

  Well,
   
  to me it looks like
      WHERE        subject_id
  IN (102, 105);will select 2 classes. Since there are a minimum of 2   teachers per class, this will select at least 4 teachers.     
  Am I missing something?
   
  Stephen>>> kjanusz_at_att.net 08/21/01 09:25AM
>>>I am taking the Self-Test software test for the SQL exam
  and don't see how they get the answer to this problem.  They   don't explain how it is arrived at.Any help you can give me will be   appreciated.Thanks,Ken Janusz,

  CPIM----------------------------------Examine the structure of 

  the TEACHER table:Name       

          Null?    
      TypeID        
          NOT NULL    

  NUMBER(9)SALARY           
             
  NUMBER(7,2)SUBJECT_ID       
      NOT NULL   
  NUMBER(3)SUBJECT_DESCRIPTION       
      VARCHAR2(2)There are 200 teachers and 15   subjects.  Each subject is taughtby at least 2   teachers.Evaluate this PL/SQL
  block:DECLARE    v_pct_raise   
      number := 1.10;BEGIN   
  UPDATE        teacher   
  SET        salary = salary *
  1.10    WHERE       
  subject_id IN (102, 105);    COMMIT;END;Which   result will the PL/SQL block provide?(A) Only two teachers will   receive a 10% salary increase.(B) All of the teachers will receive a 10%   salary increase.(C) At least four teachers will receive a 10% salary   increase.(D) A syntax error will occur.Answer:(C)

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Received on Wed Aug 22 2001 - 04:33:47 CDT