/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

1 vote214 views1 answer
Org.h2.jdbc.jdbcsqlsyntaxerrorexception table not found
SQL
0 vote230 views1 answer
Sqlalchemy query sql compiled
SQL
13 votes220 views2 answers
Get date from now() mysql
SQL
4 votes248 views4 answers
Mysql get date from datetime
SQL
0 vote226 views1 answer
Postegresql update to null
SQL
0 vote230 views1 answer
Normalization in database
SQL
3 votes255 views1 answer
Oracle undo tablespace schema
SQL
3 votes212 views2 answers
WhereIn SQL
SQL
0 vote217 views1 answer
Show database not empty tables postgres
SQL
0 vote210 views1 answer
Codeigniter dbforge add index
SQL