merge command in sql

rohit answered on July 16, 2020 Popularity 9/10 Helpfulness 4/10

answer merge command in sql

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merge command in sql

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USE SqlShackMergeDemo
GO
    
MERGE TargetProducts AS Target
USING SourceProducts	AS Source
ON Source.ProductID = Target.ProductID
    
-- For Inserts
WHEN NOT MATCHED BY Target THEN
    INSERT (ProductID,ProductName, Price) 
    VALUES (Source.ProductID,Source.ProductName, Source.Price)
    
-- For Updates
WHEN MATCHED THEN UPDATE SET
    Target.ProductName	= Source.ProductName,
    Target.Price		= Source.Price
    
-- For Deletes
WHEN NOT MATCHED BY Source THEN
    DELETE;

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Contributed on Feb 16 2022

rohit

0 Answers Avg Quality 2/10

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merge in sql

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MERGE sales.category t 
    USING sales.category_staging s
ON (s.category_id = t.category_id)
WHEN MATCHED
    THEN UPDATE SET 
        t.category_name = s.category_name,
        t.amount = s.amount
WHEN NOT MATCHED BY TARGET 
    THEN INSERT (category_id, category_name, amount)
         VALUES (s.category_id, s.category_name, s.amount)
WHEN NOT MATCHED BY SOURCE 
    THEN DELETE;
Code language: SQL (Structured Query Language) (sql)

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Source: www.sqlservertutorial.net

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Contributed on Apr 20 2023

Nanu

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sql merge statement

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MERGE LoginTypes T
        USING (SELECT 'System' as Description) S
        ON(S.Description = T.Description)
WHEN NOT MATCHED BY TARGET
    THEN INSERT(Description, CreatedTimestamp, LastUpdatedTimestamp)
VALUES('System', getdate(), getdate());

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Contributed on Jul 16 2020

Frightened Finch

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merge in sql

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/* Selecting the Target and the Source */
MERGE PRODUCT_LIST AS TARGET
    USING UPDATE_LIST AS SOURCE
 
    /* 1. Performing the UPDATE operation */
 
    /* If the P_ID is same,
       check for change in P_NAME or P_PRICE */
    ON (TARGET.P_ID = SOURCE.P_ID)
    WHEN MATCHED
         AND TARGET.P_NAME <> SOURCE.P_NAME
         OR TARGET.P_PRICE <> SOURCE.P_PRICE
 
    /* Update the records in TARGET */
    THEN UPDATE
         SET TARGET.P_NAME = SOURCE.P_NAME,
         TARGET.P_PRICE = SOURCE.P_PRICE
      
    /* 2. Performing the INSERT operation */
 
    /* When no records are matched with TARGET table
       Then insert the records in the target table */
    WHEN NOT MATCHED BY TARGET
    THEN INSERT (P_ID, P_NAME, P_PRICE)         
         VALUES (SOURCE.P_ID, SOURCE.P_NAME, SOURCE.P_PRICE)
 
    /* 3. Performing the DELETE operation */
 
    /* When no records are matched with SOURCE table
       Then delete the records from the target table */
    WHEN NOT MATCHED BY SOURCE
    THEN DELETE
 
/* END OF MERGE */

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Source: www.geeksforgeeks.org

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Contributed on Aug 24 2022

Cloudy Crayfish

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merge command in sql

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