Find duplicates 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 duplicates mysql

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

Find duplicate keys in mysql

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

Similar codes

7 votes208 views1 answer
Oracle alter sequence restart start with
SQL
0 vote88 views2 answers
Spring properties file for db
SQL
0 vote126 views1 answer
Add alternate add column sql
SQL
4 votes123 views1 answer
Restart for pg_hba.conf file
SQL
0 vote113 views1 answer
Como hacer una consulta de un registro que no esta en una tabla en mysql
SQL
5 votes128 views1 answer
Add column table sql default value
SQL
0 vote147 views1 answer
5.Query to raise salary of all employees with 300 in EMP table and display name and salary as new sal from EMP table employee name, job, and salary from EMP table.
SQL
0 vote129 views1 answer
SQLSTATE[42000]: Syntax error or access violation: 1140 Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause
SQL
0 vote120 views1 answer
Create bdd mysql
SQL
1 vote118 views3 answers
Read all columns of a table sql
SQL