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How to query two tables to determine if at least one of the column values does not match

Posted on 2013-10-28
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Last Modified: 2013-10-28
I need to compare two tables to count how many emps have the same Applid, but might not have the same SSN, Gender, DOB, City of Birth or State of Birth. Its possible for them to have the same Applid, same Gender, but not SSN or same Applid, same DOB, but not City of Birth..pretty much any combination of the above.

Exact request: How many Applicant Ids where at least one of the following does not match - SSN, Gender, Date of Birth, City of Birth, State of Birth?

Applid table

Applid
Appl_FName
Appl_LName
SSN
Gender
Date of Birth
City of Birth
State of Birth

Person table
Applid
SSN
Gender
Date of Birth
City of Birth
State of Birth


I know to join the tables on Applid but after I am not sure how to proceed. Thanks in advance for the help
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Question by:SQLnewbie77
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2 Comments
 
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Accepted Solution

by:
slightwv (䄆 Netminder) earned 500 total points
ID: 39606320
Try something like this:

create table tab1(col1 char(1), col2 char(1), col3 char(1)); 

drop table tab2 purge;
create table tab2(col1 char(1), col2 char(1), col3 char(1)); 


insert into tab1 values('a','a','a');
insert into tab1 values('b','a','b');
insert into tab1 values('c','c','a');

insert into tab2 values('a','a','a');
insert into tab2 values('b','b','a');
insert into tab2 values('c','a','c');
commit;


select t1.*, t2.*
from tab1 t1, tab2 t2
where t1.col1=t2.col1 and
(
	t1.col2 != t2.col2 or
	t1.col3 != t2.col3
)
/

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Author Closing Comment

by:SQLnewbie77
ID: 39606362
thanks!
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