Why rowid has been used in the below query? What does it do

Question

SELECT BANK_CODE,COUNTRY_CODE,CITY_CODE,BANK_TYPE FROM TL_BANK WHERE rowid=(select rowid from TL_BANK
where BANK_CODE||COUNTRY_CODE||CITY_CODE ='10377244910CNSHA' AND ACTION_FLAG ='D')

Answer 1

Arun Kr Gupta wrote:
You can change query to
SELECT BANK_CODE,COUNTRY_CODE,CITY_CODE,BANK_TYPE
FROM TL_BANK
WHERE BANK_CODE||COUNTRY_CODE||CITY_CODE ='10377244910CNSHA'
AND ACTION_FLAG ='D' ;Regards
ArunI think that you'd do better changing it to something like:
SELECT
  BANK_CODE,
  COUNTRY_CODE,
  CITY_CODE,
  BANK_TYPE
FROM
  TL_BANK
WHERE
  BANK_CODE = ... AND
  COUNTRY_CODE = ... AND
  CITY_CODE = ... AND
  ACTION_FLAG ='D' ;And then fire the person who wrote the orginal query.