/SQL/Finding duplicate column values in table with 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

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 vote312 views1 answer
How to select an index in oracle sql
SQL
1 vote314 views1 answer
Tsql get beginning of year
SQL
0 vote313 views1 answer
Automated psql csv export script on windows
SQL
0 vote301 views3 answers
Insert or ignore postgres
SQL
0 vote288 views1 answer
Forcefully delete a row in mysql which has references
SQL
0 vote302 views1 answer
Update sqlaclehmy sqlalchemy.orm.evaluator.UnevaluatableError: Cannot evaluate BinaryExpression with operator <function like_op at 0x03CF1DF0>
SQL
0 vote318 views1 answer
Tsql delete all rows
SQL
24 votes293 views4 answers
Mssql get all table names
SQL
1 vote294 views1 answer
Neo4j display all nodes and relationships
SQL
0 vote311 views1 answer
Get who is hired in month in sql
SQL