find duplicates mysql column
SELECT name, COUNT(*) c FROM table GROUP BY name HAVING c > 1;
find duplicates mysql column
SELECT name, COUNT(*) c FROM table GROUP BY name HAVING c > 1;
find duplicate keys in mysql
SELECT col, COUNT(col) FROM table_name GROUP BY col HAVING COUNT(col) > 1;
mysql find duplicates in same table
## Find ALL duplicate recods by value (without grouping them by value) ## # to find the duplicate, # replace all instances of tableName with your table name # and all instances of duplicateField with the field name where you look for duplicates SELECT t1.* FROM tableName AS t1 INNER JOIN( SELECT duplicateField FROM tableName GROUP BY duplicateField HAVING COUNT(duplicateField) > 1 )temp ON t1.duplicateField = temp.duplicateField order by duplicateField
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