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

4 votes95 views2 answers
Could not find driver (SQL: select * from information_schema.tables where table_schema = pics and table_name = migrations and table_type = 'BASE TABLE')
SQL
13 votes151 views3 answers
Mysqldump structure only
SQL
0 vote105 views1 answer
Longtext sql
SQL
0 vote88 views1 answer
Create api project in visual studio 2019 and sql server
SQL
0 vote115 views1 answer
Create database like
SQL
1 vote111 views2 answers
Mysql trim spaces
SQL
0 vote112 views1 answer
Second Step in installing SQL workbench
SQL
0 vote106 views2 answers
Get item by composite primary key mysql
SQL
1 vote105 views1 answer
Access the postgres psql
SQL
4 votes99 views2 answers
Sql table
SQL