how to get count of repeated values in sql code example
Example 1: sql count duplicate rows
SELECT _column, COUNT(*)
FROM _table
GROUP BY _column
HAVING COUNT(*) > 1
Example 2: sql get rows with duplicate values
SELECT fieldA, COUNT(*)
FROM tableA
GROUP BY fieldA
HAVING COUNT(*) > 1
SELECT a.*
FROM tableA a
JOIN (
SELECT fieldA, COUNT(*) as 'count'
FROM tableA
GROUP BY fieldA
HAVING COUNT(*) > 1
) b
ON a.fieldA = b.fieldA
Example 3: how to get duplicate values in sql
• SELECT first_name, COUNT (first_name) FROM employees
GROUP BY first_name
HAVING (COUNT(first_name) > 1);