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Re: Display all the records from table using cursor
Posted by: Peter Brawley
Date: September 26, 2017 01:34PM

OK, it's guaranteed that if b.issn1=b.issn2 or b.issn=b.eissn or b.title_sci=b.title then b.cc=0, otherwise b.cc=1.

> if b.cc<>0, consult the master and update the b.cc based on m.cc for this row.

That appears to mean: if b.cc <> 0 then set b.cc=m.cc for that row.

So now the spec looks simpler ...

In a join of b to m on (title_sci, title, issn1,issn2, issn, eissn, databas) ...
 
if b.title_sci=b.title or b.issn1=b.issn2 or b.issn=b.eissn then
  already b.cc=0, do nothing    
end if
if b.cc <> 0 then
  update b set b.cc=m.cc
  where b.title_sci=m.title_sci and b.title=m.title and b.issn1=m.issn1 and b.issn=m.issn and b.eissn=m.eisssn;
end if

Does it look correct to you?

An assumption of your requirement is that there's exactly one matching m row for each combination of title, title_sci, issn1, issn, eissn, databas values in b. Problems with the datasets you posted prevent me from checking that assumption.

So try this query in your system ...

select b.title,b.title_sci,b.issn1,b.issn2,b.issn,b.eissn,b.databas,count(*) as N
from base_report b
join master_data m using (title,title_sci,issn1,issn2,issn,eissn,databas)
group by b.title, b.title_sci, b.issn1, b.issn2, b.issn, b.eissn, b.databas
having N<>1;

If it produces any rows, the above assumption is false.



Edited 1 time(s). Last edit at 09/26/2017 01:35PM by Peter Brawley.

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Re: Display all the records from table using cursor
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