Delete Duplicate Records In Sql
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Delete Duplicate Records In Sql
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Sql Server Query To Find Column From All Tables Of Database Net And C
Method 1 ROW NUMBER Analytic Function Method 2 Delete with JOIN Method 3 MIN or MAX Function Method 4 DENSE RANK Method 5 Correlated Subquery with MIN or MAX Method 6 Use a Subquery with ANY Other Methods You Might Come Across Method 7 Use an Intermediate Table Conclusion The Problem Removing Duplicates in SQL Step 1: First we have to create a table named " DETAILS "- Query: CREATE TABLE DETAILS ( SN INT IDENTITY (1,1) PRIMARY KEY, EMPNAME VARCHAR (25) NOT NULL, DEPT VARCHAR (20) NOT NULL, CONTACTNO BIGINT NOT NULL, CITY VARCHAR (15) NOT NULL ); Step 2: Now, we have to insert values or data in the table. Query:
C ch X a D Li u Tr ng L p Trong Oracle Wiki Office Ti ng Vi t
Delete Duplicate Records In SqlMethod 1 Run the following script: SQL SELECT DISTINCT * INTO duplicate_table FROM original_table GROUP BY key_value HAVING COUNT(key_value) > 1 DELETE original_table WHERE key_value IN (SELECT key_value FROM duplicate_table) INSERT original_table SELECT * FROM duplicate_table DROP TABLE duplicate_table This article explains the process of performing SQL delete activity for duplicate rows from a SQL table Introduction We should follow certain best practices while designing objects in SQL Server
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