/TypeScript/How to get duplicate elements in sql

How to get duplicate elements in sql

Select duplicates in sql

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

Source: chartio.com

Sql count duplicate rows

SELECT _column, COUNT(*) 
FROM _table
GROUP BY _column
HAVING COUNT(*) > 1

How to get duplicate elements in sql

• SELECT first_name, COUNT (first_name) FROM employees
GROUP BY first_name
HAVING (COUNT(first_name) > 1);

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

4 votes240 views2 answers
Enable Template Path Hints for Storefront
TypeScript
5 votes279 views5 answers
Angular 8 ngClass If
TypeScript
0 vote264 views1 answer
How should a developer write unit tests for a private method in an apex class
TypeScript
0 vote258 views1 answer
Passing arguments in python from command line as key value
TypeScript
0 vote246 views1 answer
Res.write prints html tags as text in express
TypeScript
0 vote315 views1 answer
Array.join typescript
TypeScript
1 vote228 views1 answer
React-native loading bar
TypeScript
7 votes303 views3 answers
Class 'kotlin.Unit' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.5.1, expected version is 1.1.15.
TypeScript
0 vote249 views1 answer
The migration '20200806160941_InitialMigration' has already been applied to the database. Revert it and try again. If the migration has been applied to other databases, consider reverting its changes using a new migration.
TypeScript
0 vote261 views1 answer
What is the reason we are using properties file
TypeScript