Write a SQL query to delete all duplicate email entries in a table named Person
, keeping
only unique emails based on its smallest Id.
+----+------------------+ | Id | Email | +----+------------------+ | 1 | [email protected] | | 2 | [email protected] | | 3 | [email protected] | +----+------------------+ Id is the primary key column for this table.
For example, after running your query, the above Person
table should have the following
rows:
+----+------------------+ | Id | Email | +----+------------------+ | 1 | [email protected] | | 2 | [email protected] |
+----+------------------+
# Write your MySQL query statement below
delete p1 from Person p1 inner join Person p2
where p1.email=p2.email and p1.id>p2.id;