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 vote156 views1 answer
How to create a table based on another table in mysql
SQL
13 votes187 views6 answers
Mysql remove duplicates
SQL
0 vote145 views1 answer
Oracle sql generate list of days
SQL
0 vote142 views1 answer
Date datatype in livesql
SQL
1 vote163 views1 answer
Mysql Case sum
SQL
0 vote148 views1 answer
Sql server select value large text
SQL
0 vote152 views1 answer
Mysql reset wp_options
SQL
11 votes136 views2 answers
Insert date sql
SQL
0 vote160 views1 answer
How to get distinct sets of rows using SQL (Oracle)?
SQL
1 vote178 views3 answers
Sql procedure
SQL