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Pair and Non Pair Wise Comparison
What is the difference between pair wise & non pair wise comparison in a multiple column subquery. In which case are these used?


  
Total Answers and Comments: 1 Last Update: September 30, 2008     Asked by: svp.kiran 
  
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September 30, 2008 03:20:40   #1  
todeepakmalhotra Member Since: September 2008   Contribution: 9    

RE: Pair and Non Pair Wise Comparison
In pair wise comparison we write like this:

"where (MGR_ID DEPT_ID) IN (SUBQUERY)"

IN non pair wise comparison we write like this:

"where (MGR_ID) IN (SUBQUERY)
and (DEPT_ID) IN (SUBQUERY)"


In first one we are checking two columns simultaneously within a single query whereas in the second one we are checking each column individually with two queries.

So the output will also differes check it out by practical implementation.

 
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What is the difference between pair wise & non pair wise comparison in a multiple column subquery. In which case are these used? 
Latest Answer : In pair wise comparison we write like this:"where (MGR_ID, DEPT_ID) IN (SUBQUERY)"IN non pair wise comparison we write like this:"where (MGR_ID) IN (SUBQUERY)and (DEPT_ID) IN (SUBQUERY)"In first one we are checking two columns simultaneously ...


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