SQL

finding duplicate rows mysql

SELECT varchar_col
FROM table
GROUP BY varchar_col
HAVING COUNT(*) > 1;

mysql get latest duplicate rows

SELECT
   t1.primary_id,
   t1.duplicate_id,
   t1.data1,
   t1.data2
FROM
   table_name t1
LEFT JOIN table_name t2
	ON (t1.duplicate_id = t2.duplicate_id AND t1.primary_id < t2.primary_id) 
WHERE
	t2.primary_id IS NULL

finding duplicate rows mysql

SELECT name, COUNT(*) c FROM table GROUP BY name HAVING c > 1;

mysql query to find duplicate records

SELECT firstname, 
   lastname, 
   list.address 
FROM list
   INNER JOIN (SELECT address
               FROM   list
               GROUP  BY address
               HAVING COUNT(id) > 1) dup
           ON list.address = dup.address;

Mysql Selected All Duplicate Rows

select t.*
from table t
where exists (select 1 from table t2 where t2.url = t.url and t2.id <> t.id);

duplicate row mysql

# Duplicate rows or row
INSERT INTO table (col1, col2, col3)
SELECT col1, col2, col3 FROM table
WHERE something...;