/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 vote182 views1 answer
Soql more than today
SQL
0 vote307 views3 answers
Insert or ignore postgres
SQL
0 vote273 views1 answer
Shortcut run sql pgadmin
SQL
2 votes258 views1 answer
Creating a view SQL
SQL
0 vote214 views2 answers
What is the default password for sql server sa
SQL
0 vote189 views1 answer
Java check if something is in mysql table
SQL
3 votes189 views3 answers
Stop mysql service ubuntu
SQL
4 votes199 views1 answer
Mysql ip address data type
SQL
0 vote178 views1 answer
Incorrect string value: '\xC4\x81ne' for column
SQL
2 votes181 views1 answer
Change primary key sql
SQL