Initial commit

DeleteAllCustomers.sql

@@ -0,0 +1,66 @@
+-- =============================================
+-- Delete All Customers for Testing
+-- WARNING: This will delete ALL customer data!
+-- =============================================
+
+USE PowderCoatingDb;
+GO
+
+BEGIN TRANSACTION;
+
+BEGIN TRY
+    PRINT 'Starting customer deletion...';
+
+    -- Count customers before deletion
+    DECLARE @CustomerCount INT;
+    SELECT @CustomerCount = COUNT(*) FROM Customers;
+    PRINT 'Found ' + CAST(@CustomerCount AS VARCHAR) + ' customers to delete';
+
+    -- Option 1: Delete related data first (safest)
+    -- Update Jobs to remove customer references
+    PRINT 'Removing customer references from Jobs...';
+    UPDATE Jobs SET CustomerId = NULL WHERE CustomerId IS NOT NULL;
+
+    -- Update Quotes to remove customer references
+    PRINT 'Removing customer references from Quotes...';
+    UPDATE Quotes SET CustomerId = NULL WHERE CustomerId IS NOT NULL;
+
+    -- Delete all customers (hard delete)
+    PRINT 'Deleting all customers...';
+    DELETE FROM Customers;
+
+    -- Verify deletion
+    SELECT @CustomerCount = COUNT(*) FROM Customers;
+    PRINT 'Remaining customers: ' + CAST(@CustomerCount AS VARCHAR);
+
+    PRINT 'Customer deletion completed successfully!';
+    COMMIT TRANSACTION;
+    PRINT 'Transaction committed.';
+
+END TRY
+BEGIN CATCH
+    PRINT 'Error occurred: ' + ERROR_MESSAGE();
+    ROLLBACK TRANSACTION;
+    PRINT 'Transaction rolled back.';
+END CATCH;
+
+GO
+
+-- Verify the results
+SELECT
+    'Customers' AS TableName,
+    COUNT(*) AS RecordCount
+FROM Customers
+UNION ALL
+SELECT
+    'Jobs with NULL CustomerId',
+    COUNT(*)
+FROM Jobs
+WHERE CustomerId IS NULL
+UNION ALL
+SELECT
+    'Quotes with NULL CustomerId',
+    COUNT(*)
+FROM Quotes
+WHERE CustomerId IS NULL;
+GO