If there are duplicates, make a new table named zeta_nodupes that has no duplicates. Now are there any duplicate rows of data? How can you tell? code example
Example 1: select duplicates in sql
SELECT username, email, COUNT(*)
FROM users
GROUP BY username, email
HAVING COUNT(*) > 1
Example 2: sql query to find duplicates in column
SELECT name, COUNT(email)
FROM users
GROUP BY email
HAVING COUNT(email) > 1