How to test the following SQL script in Oracle 11g -

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below script written in oracle 11g:

 merge tblbio t       using (select e.id, tblduplicate.cpid, e.bdt,e.ln, e.fn                          tblduplicate, entities           trim(e.id) = trim(tblduplicate.id)) source       on (t.cpid = source.cpid , trim(t.bdt) = trim(source.bdt)) when matched update set t.id = source.id, t.stat = '4'  t.cmp = 'hhcc'   , t.thn = '2013'   , trim(lower(source.ln)) = trim(lower(t.ln))   , trim(lower(source.fn)) = trim(lower(t.fn))   , nvl(trim(t.bdt), ' ') <> ' '   , t.bdt <> '00000000'   , nvl(trim(source.bdt), ' ') <> ' '   , source.bdt <> '00000000'   , t.stat <> '4'

due data integrity problem, script once in awhile generate more 1 records. in script generate error. want create validation prior script run. when validation generate more 1 records stop script running. how can that?

i tried write following validation capture record count oracle did not it. 

 select* tblbio t <-----       using (select e.id, tblduplicate.cpid, e.bdt,e.ln, e.fn                          tblduplicate, entities           trim(e.id) = trim(tblduplicate.id)) source       on (t.cpid = source.cpid , trim(t.bdt) = trim(source.bdt)) when matched select * tblbio t <-----  t.cmp = 'hhcc'   , t.thn = '2013'   , trim(lower(source.ln)) = trim(lower(t.ln))   , trim(lower(source.fn)) = trim(lower(t.fn))   , nvl(trim(t.bdt), ' ') <> ' '   , t.bdt <> '00000000'   , nvl(trim(source.bdt), ' ') <> ' '   , source.bdt <> '00000000'   , t.stat <> '4'

converting original merge query select tbiblio:

  • merge ... using --> select ... join
  • when matched update set ... where --> where

final query:

select * tblbio t        join (select e.id, tblduplicate.cpid, e.bdt,e.ln, e.fn                          tblduplicate, entities           trim(e.id) = trim(tblduplicate.id)) source       on (t.cpid = source.cpid , trim(t.bdt) = trim(source.bdt))  t.cmp = 'hhcc'   , t.thn = '2013'   , trim(lower(source.ln)) = trim(lower(t.ln))   , trim(lower(source.fn)) = trim(lower(t.fn))   , nvl(trim(t.bdt), ' ') <> ' '   , t.bdt <> '00000000'   , nvl(trim(source.bdt), ' ') <> ' '   , source.bdt <> '00000000'   , t.stat <> '4'

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