Find duplicate keys in mysql

Find duplicates mysql column

SELECT name, COUNT(*) c FROM table GROUP BY name HAVING c > 1;

Source: stackoverflow.com

Select where duplicate mysql

SELECT 
    col1, COUNT(col1),
    col2, COUNT(col2)
FROM
    table_name
GROUP BY 
    col1, 
    col2
HAVING 
       (COUNT(col1) > 1) AND 
       (COUNT(col2) > 1);

Source: mysqltutorial.org

Find duplicate keys in mysql

SELECT col, COUNT(col) FROM table_name GROUP BY col HAVING COUNT(col) > 1;

Similar codes

0 vote114 views1 answer
Lesser than or equal to symbol in postgres
SQL
0 vote110 views1 answer
Sql server union if table exist
SQL
0 vote110 views1 answer
Drush SQLSTATE[HY000] [2002] No such file or directory
SQL
0 vote67 views1 answer
Mariadb list tables
SQL
0 vote109 views1 answer
Zsh-syntax-highlighting zsh-autosuggestions
SQL
-1 vote116 views1 answer
Sql oracle take only last results
SQL
0 vote118 views1 answer
Mysqlcli how to load external sql file
SQL
53 votes217 views6 answers
How to install mysql ubuntu
SQL
5 votes118 views1 answer
Minecraft java port number
SQL
0 vote122 views1 answer
Sqlalchemy query join many to many
SQL