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 vote140 views1 answer
Sql select upcoming birthdays
SQL
0 vote149 views1 answer
Sql server list table sizes
SQL
1 vote142 views2 answers
Sql where keyword
SQL
0 vote130 views1 answer
Get sum sqlite android
SQL
1 vote147 views1 answer
Oracle nvl2
SQL
0 vote155 views2 answers
Amazon linux postgresql client
SQL
0 vote160 views1 answer
Postgres full text search example
SQL
3 votes136 views2 answers
Java.sql.SQLException: Unknown initial character set index '255' received from server. Initial client character set can be forced via the 'characterEncoding' property.
SQL
0 vote154 views1 answer
Least spark sql
SQL
0 vote146 views1 answer
Mysql Like(searching in the string)
SQL