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Part 1: Part Title
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Building Queries in an Access Project
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AS SET NOCOUNT ON DECLARE @intCompanyID int, @intContactID int, @retErr int
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--Will capture any error messages
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--Make sure all the variables and output parameters are set to the defaults SELECT @intCompanyID = 0, @intContactID = 0, @retSuccess = 1, @retErr = 0 -- Exit procedure if @Company_Name is null IF @Company_Name IS NULL BEGIN SELECT @intCompanyID = 0, @retMsg = You must supply a company name. SELECT @intCompanyID AS New CompanyID , @intContactID AS New ContactID', @retMsg AS 'Last Status Message' RETURN END -- Exit procedure if @Contact_Last_Name is null IF @Contact_Last_Name IS NULL BEGIN SELECT @intContactID = 0, @retMsg = 'You must supply a contact last name. ' SELECT @intCompanyID AS 'New CompanyID', @intContactID AS 'New ContactID', @retMsg AS 'Last Status Message' RETURN END /* We have values for @Company_Name and @Contact_Last_Name So let's begin the TRANSACTION and add the rows */ BEGIN TRANSACTION -- First, add the company row INSERT INTO dbo.tblCompanies (CompanyName, Department, Address, City, County, StateOrProvince, PostalCode, Country, PhoneNumber, FaxNumber, Website, ReferredBy) VALUES (@Company_Name, @Department, @Address, @City, @County, @State_Or_Province, @Postal_Code, @Country, @Phone_Number, @Fax_Number, @Website, @Referred_By) SET @retErr = @@Error --Check for any errors IF @retErr <> 0 SELECT @retSuccess = 0, @intCompanyID = 0, @retMsg = 'Insert failed. No company was added. ' ELSE SELECT @retSuccess = 1, @intCompanyID = @@IDENTITY, @retMsg = 'New company added successfully ' --Next, add the contact row by Executing sptAddContact --But don't do it if Company insert already failed
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Part 4: Designing an Access Project
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Part 00: Part Title
Microsoft Office Access 2003 Inside Out
IF @retSuccess = 1 BEGIN EXECUTE sptXmplAddContact @Last_Name = @Contact_Last_Name, @First_Name = @Contact_First_Name, @Work_Address = @Address, @Work_City = @City, @Work_State_Or_Province = @State_Or_Province, @Work_Postal_Code = @Postal_Code, @Work_Country = @Country, @Work_Phone = @Phone_Number, @Work_Extension = @Contact_Extension, @Work_Fax_Number = @Fax_Number, @Website = @Website, @ContactID = @intContactID OUTPUT SET @retErr = @@Error --Check for any errors -- Also test @intContactID returned by the procedure IF @retErr <> 0 Or @intContactID = 0 SELECT @retSuccess = 0, @retMsg = 'Insert failed. No contact was added. ' ELSE SELECT @retSuccess = 1, @intContactID = @@IDENTITY, @retMsg = 'New contact added successfully ' END --Finally, add the row to the CompanyContacts table --But don't do it if either previous insert failed IF @retSuccess = 1 BEGIN INSERT INTO dbo.tblCompanyContacts (CompanyID, ContactID, DefaultForContact, DefaultForCompany) VALUES (@intCompanyID, @intContactID,1,1)
Part 4: Designing an Access Project
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SET @retErr = @@Error --Check for any errors IF @retErr <> 0 SELECT @retSuccess = 0, @retMsg = 'Insert failed. No company-contact was added.' ELSE SELECT @retMsg = 'New company-contact added successfully.' END If @retSuccess = 1 BEGIN COMMIT TRANSACTION END ELSE BEGIN ROLLBACK TRANSACTION END
Part 1: Part Title
Building Queries in an Access Project
-- Return the new company ID, contact ID, and status message. -- The IDs will be zero if the procedure failed. SELECT @intCompanyID AS 'New CompanyID', @intContactID AS 'New ContactID', @retMsg AS 'Last Status Message' RETURN
Also note that the company address and phone information is used for the work address and phone information for the contact. Because this is a company contact that you re creating, you can assume that they will be the same. You can leave out the contact s home address and other information that is not relevant to creating a useful company contact record. You can find this procedure saved as sptXmplAddCompanyAndContact in the sample database. To test this procedure, you can open the tblContacts table in Design view and clear the Allow Nulls property for the FirstName column. Run the procedure and supply a company name and contact last name, but do not supply a contact first name. You should see the procedure fail, and you won t find a new company record saved in the database even though the INSERT to the tblCompanies table succeeded. Note When you run the sptXmplAddCompanyAndContact stored procedure, Access prompts you for the two output parameters, @retSuccess and @retMsg. You should not enter values for these two parameters. You would normally execute this stored procedure from another query or a Visual Basic procedure. Because the two output parameters have default values declared, you do not need to supply these parameters when you execute this procedure from another procedure. So far, we have covered many commands that are commonly used in stored procedures, but we have only scratched the surface. If you want to learn more about creating stored procedures and Transact-SQL in general, SQL Server Books Online is an excellent place to start. Tip You can also look up some of the SQL Server system functions in Article 3, Function Reference, on the book s companion CD. They are organized by type of function (Arithmetic, Conversion, Date/Time, etc.) and are listed in order of their Visual Basic equivalents.
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