数据修改过程中出现问题—— ora-20595, ora-06512, ora-04088

Question

如题

Answer 1

ora-20595: no data found in single select.
ora-06512: at "TEST.TR_U_COMPONENT", line 60
ora-04088: error during excution of trigger 'TEST.TR_U_COMPONENT'

Answer 2

ora-20595: no data found in single select.
ora-06512: at "TEST.TR_U_COMPONENT", line 60
ora-04088: error during excution of trigger 'TEST.TR_U_COMPONENT'WHEN NO_DATA_FOUND THEN
  raise_application_error (-20595, 'No data found in a single select.');

Answer 3

'TEST.TR_U_COMPONENT' 
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