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

3 votes286 views1 answer
Define REGEXP?
SQL
3 votes284 views2 answers
Plsql print
SQL
0 vote300 views1 answer
Drop database using terminal postgres
SQL
2 votes324 views1 answer
Oracle find constraints referencing a table
SQL
0 vote298 views1 answer
Postgres sequence name
SQL
0 vote277 views1 answer
Select list is not in group by clause and contains nonaggregated column codeigniter
SQL
1 vote290 views1 answer
SQL: merging multiple row data in string
SQL
4 votes294 views3 answers
Check if two date ranges overlap sql server
SQL
0 vote288 views1 answer
Cast float mysql
SQL
0 vote317 views2 answers
Mysql two column combination unique
SQL