FIND DUPLICATES IN COLUMN SQL

Finding duplicate column values in table with sql

SELECT username, email, COUNT(*)
FROM users
GROUP BY username, email
HAVING COUNT(*) > 1

Source: chartio.com

Sql query to find duplicates in column

SELECT name, COUNT(email) 
FROM users
GROUP BY email
HAVING COUNT(email) > 1

Source: stackoverflow.com

How to get duplicate values in sql

• SELECT first_name, COUNT (first_name) FROM employees
GROUP BY first_name
HAVING (COUNT(first_name) > 1);

Get duplicate records in sql

Multiple field=SELECT username, email, COUNT(*)
FROM users
GROUP BY username, email
HAVING COUNT(*) > 1
Single field=SELECT _column, COUNT(*) FROM _tableGROUP BY _columnHAVING COUNT(*) > 1

FIND DUPLICATES IN COLUMN SQL

declare @YourTable table (id int, name varchar(10), email varchar(50))

INSERT @YourTable VALUES (1,'John','John-email')
INSERT @YourTable VALUES (2,'John','John-email')
INSERT @YourTable VALUES (3,'fred','John-email')
INSERT @YourTable VALUES (4,'fred','fred-email')
INSERT @YourTable VALUES (5,'sam','sam-email')
INSERT @YourTable VALUES (6,'sam','sam-email')

SELECT
    name,email, COUNT(*) AS CountOf
    FROM @YourTable
    GROUP BY name,email
    HAVING COUNT(*)>1

-1

Source: stackoverflow.com

Similar codes

0 vote150 views1 answer
Sintaxis SELECT sql
SQL
0 vote201 views1 answer
Mysql get nested records
SQL
0 vote162 views1 answer
Oracle current date minus 1 day
SQL
27 votes157 views6 answers
Set password mysql
SQL
0 vote146 views1 answer
MySql shutdown unexpectedly InnoDB: Mutexes and rw_locks use Windows interlocked functions InnoDB: Uses event mutexes
SQL
23 votes123 views6 answers
ER_NOT_SUPPORTED_AUTH_MODE: Client does not support authentication protocol requested by server; consider upgrading MySQL client
SQL
1 vote145 views1 answer
Mysql view curren querys
SQL
0 vote182 views1 answer
Sql check if field is not null
SQL
7 votes168 views4 answers
Mysql delete older duplicates
SQL
15 votes157 views5 answers
Select all tables sql
SQL