/SQL/Sql remove duplicates based on column

Sql remove duplicates based on column

Query delete duplicates

DELETE FROM dups a USING (
      SELECT MIN(ctid) as ctid, key
        FROM dups 
        GROUP BY key HAVING COUNT(*) > 1
      ) b
      WHERE a.key = b.key 
      AND a.ctid <> b.ctid

Sql remove duplicates based on column

SELECT s.siteName, s.siteIP, h.date
FROM sites s INNER JOIN
     (select h.*, row_number() over (partition by siteName order by date desc) as seqnum
      from history h
     ) h
    ON s.siteName = h.siteName and seqnum = 1
ORDER BY s.siteName, h.date

Source: stackoverflow.com

Similar codes

4 votes146 views3 answers
Count with where
SQL
0 vote137 views1 answer
Data directory postgresql
SQL
0 vote134 views1 answer
Sql get month from date
SQL
1 vote155 views1 answer
How to see all table partition in oracle
SQL
0 vote152 views1 answer
Mysql change innodb to myisam
SQL
0 vote125 views1 answer
Select value from previous row in postgresql
SQL
0 vote138 views3 answers
Above average salary in sql
SQL
0 vote130 views1 answer
Sql view index
SQL
0 vote131 views1 answer
Excute raw query
SQL
0 vote140 views1 answer
Sql delete from with relation
SQL