Sunday, March 30, 2014

SQL: query occurrences of multiple fields in a table

  • student_record is table name.
  • id, name, email are column names.
  • counting more than one occurrences for above column.
SELECT id, name , email, COUNT(id) AS NumOccurrences FROM student_record
GROUP BY id, name, email HAVING ( COUNT(id) > 1 );


No comments: