How to Update Account Numbers in One SQL Table Based on Matching IDs in Another?

Updating Account Numbers in SQL: A Matching ID Approach

This article demonstrates how to efficiently update account numbers in one SQL table based on matching IDs in another. We'll use an SQL UPDATE query to achieve this.

The scenario involves two tables: Sales_Import (containing account numbers) and RetrieveAccountNumber (containing card numbers and the matching LeadID). The goal is to update the AccountNumber field in Sales_Import with data from RetrieveAccountNumber, matching on the LeadID column.

A robust solution uses an UPDATE statement with a JOIN operation. This method directly updates the target table while referencing data from the second table, ensuring accurate updates.

MS SQL Server Syntax:

UPDATE Sales_Import
SET AccountNumber = RAN.AccountNumber
FROM Sales_Import SI
INNER JOIN RetrieveAccountNumber RAN ON SI.LeadID = RAN.LeadID;

MySQL and MariaDB Syntax:

UPDATE Sales_Import SI, RetrieveAccountNumber RAN
SET SI.AccountNumber = RAN.AccountNumber
WHERE SI.LeadID = RAN.LeadID;

This approach effectively updates the AccountNumber field in Sales_Import, avoiding null value issues by only updating rows where a matching LeadID exists in both tables.

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