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tsql remove duplicate rows

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WilsonWW answered on January 23, 2021 Popularity 8/10 Helpfulness 5/10

answer tsql remove duplicate rows

related Query to remove duplicate rows from a table

related sql delete duplicate rows

related sql query to delete duplicate records

tsql remove duplicate rows

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DELETE T
FROM
(
SELECT *
, DupRank = ROW_NUMBER() OVER (
              PARTITION BY key_value
              ORDER BY (SELECT NULL)
            )
FROM original_table
) AS T
WHERE DupRank > 1

Popularity 8/10 Helpfulness 5/10 Language sql

Source: learn.microsoft.com

Tags: rows sql tsql

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Contributed on Nov 14 2022

WilsonWW

0 Answers Avg Quality 2/10

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Query to remove duplicate rows from a table

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DELETE FROM Customers WHERE ROWID(SELECT MAX (rowid) FROM Customers C WHERE CustomerNumber = C.CustomerNumber);

Popularity 10/10 Helpfulness 4/10 Language sql

Source: www.edureka.co

Tags: rows

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Contributed on Nov 19 2021

Beautiful Baboon

0 Answers Avg Quality 2/10

sql delete duplicate rows

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WITH cte AS (
    SELECT 
        contact_id, 
        first_name, 
        last_name, 
        email, 
        ROW_NUMBER() OVER (
            PARTITION BY 
                first_name, 
                last_name, 
                email
            ORDER BY 
                first_name, 
                last_name, 
                email
        ) row_num
     FROM 
        sales.contacts
)
DELETE FROM cte
WHERE row_num > 1;

Popularity 10/10 Helpfulness 4/10 Language sql

Source: www.sqlservertutorial.net

Tags: rows

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Contributed on Jun 17 2022

Dead Dotterel

0 Answers Avg Quality 2/10

sql query to delete duplicate records

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-2

--ID should be primary key

--get duplicate records using RANK
SELECT E.ID, 
    E.firstname, 
    E.lastname, 
    E.country, 
    T.rank
FROM [SampleDB].[dbo].[Employee] E
  INNER JOIN
(
 SELECT *, 
        RANK() OVER(PARTITION BY firstname, 
                                 lastname, 
                                 country
        ORDER BY id) rank
 FROM [SampleDB].[dbo].[Employee]
) T ON E.ID = t.ID;

--delete duplications
DELETE E
    FROM [SampleDB].[dbo].[Employee] E
         INNER JOIN
    (
        SELECT *, 
               RANK() OVER(PARTITION BY firstname, 
                                        lastname, 
                                        country
               ORDER BY id) rank
        FROM [SampleDB].[dbo].[Employee]
    ) T ON E.ID = t.ID
    WHERE rank > 1;

Popularity 10/10 Helpfulness 2/10 Language sql

Source: Grepper

Tags: records

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Contributed on Jan 23 2021

RakshaD

0 Answers Avg Quality 2/10

tsql remove duplicate rows

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