Sql check double value

Sql query to find duplicates in column

SELECT name, COUNT(email) 
FROM users
GROUP BY email
HAVING COUNT(email) > 1

Source: stackoverflow.com

Sql check double value

SELECT
    name, email, COUNT(*)
FROM
    users
GROUP BY
    name, email
HAVING 
    COUNT(*) > 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 vote165 views1 answer
Mysql update set sum
SQL
1 vote163 views1 answer
Oracle nvl2
SQL
0 vote163 views8 answers
Convert sql query to linq online
SQL
0 vote150 views1 answer
Select only one row sql
SQL
3 votes178 views5 answers
Foreign keys
SQL
0 vote142 views1 answer
How to print out column name differently in mysql
SQL
7 votes158 views5 answers
Show details of table postgres
SQL
3 votes155 views1 answer
Pl sql escape &
SQL
0 vote181 views4 answers
Convert databse to achieve log mode oracle
SQL
1 vote213 views1 answer
Connect to mysql database ubuntu
SQL