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

1 vote600 views1 answer
How to lock table in mysql
SQL
6 votes174 views4 answers
Sqlite drop table
SQL
24 votes184 views6 answers
Sql change table name
SQL
0 vote179 views1 answer
Drop a field in psql django
SQL
2 votes187 views4 answers
Sql query interview questions
SQL
0 vote175 views1 answer
Lesser than or equal to symbol in postgres
SQL
31 votes211 views2 answers
Grant all priviledges to mysql user
SQL
1 vote172 views3 answers
How to truncate foreign key constraint table
SQL
0 vote191 views1 answer
"/** MySQL database password */" ext:txt | ext:cfg | ext:env | ext:ini
SQL
4 votes143 views2 answers
Select todays data postgres query
SQL