Pregunta de entrevista de OpenText
duplicate count from database
Respuesta de la entrevista
Anónimo
17 de nov de 2020
SELECT col1, col2, COUNT(*) FROM tbl_name GROUP BY col1, col2 HAVING COUNT(*) > 1
2
duplicate count from database
Anónimo
SELECT col1, col2, COUNT(*) FROM tbl_name GROUP BY col1, col2 HAVING COUNT(*) > 1