/SQL/Remove duplicate old value in mysql

Remove duplicate old value in mysql

Mysql remove duplicates

DELETE c1 FROM tablename c1
INNER JOIN tablename c2 
WHERE
    c1.id > c2.id AND 
    c1.unique_field = c2.unique_field;

Identify rows with 2 same column value and delete duplicate mysql

DELETE c1 FROM contacts c1
INNER JOIN contacts c2 
WHERE
    c1.id > c2.id AND 
    c1.email = c2.email;
Code language: SQL (Structured Query Language) (sql)

Source: mysqltutorial.org

Delete all duplicate rows keep the latest except for one in mysql

DELETE 
FROM
  `tbl_job_title` 
WHERE id NOT IN 
  (SELECT 
    * 
  FROM
    (SELECT 
      MAX(id) 
    FROM
      `tbl_job_title` 
    GROUP BY NAME) tbl)

Source: stackoverflow.com

Remove duplicate old value in mysql

DELETE `yellow_page_content`
   from `yellow_page_content`
  inner join (
     select max(`id`) as lastId, `code`
       from `yellow_page_content`
      group by `code`
     having count(*) > 1) duplic on duplic.code = yellow_page_content.code
  where yellow_page_content.id < duplic.lastId;

Similar codes

34 votes398 views6 answers
Alter table add foreign key mysql
SQL
0 vote318 views1 answer
Disableforiegn key check
SQL
14 votes328 views3 answers
SQL trim
SQL
0 vote318 views1 answer
Like and not like together in sql
SQL
0 vote332 views1 answer
How to find columns with null values in sql
SQL
1 vote315 views2 answers
Pl sql case
SQL
5 votes338 views2 answers
Create function postgresql
SQL
1 vote341 views1 answer
Quit mysql
SQL
0 vote331 views1 answer
FIND LOWEST SALARY EARNER IN SQL
SQL
0 vote324 views1 answer
Check if table exists oracle
SQL