Updating sql server from access
This white paper presents techniques for improving performance and updatability in Office Access applications that use tables linked to SQL Server.
Any subsequent changes you make to the data in Access are not reflected in the SQL Server database.UPDATE is especially useful when you want to change many records or when the records that you want to change are in multiple tables. The following example increases the Order Amount values by 10 percent and the Freight values by 3 percent for shippers in the United Kingdom: Sub Update X() Dim dbs As Database Dim qdf As Query Def ' Modify this line to include the path to Northwind ' on your computer.Set dbs = Open Database("Northwind.mdb") ' Change values in the Reports To field to 5 for all ' employee records that currently have Reports To ' values of 2. Execute "UPDATE Employees " _ & "SET Reports To = 5 " _ & "WHERE Reports To = 2;" dbs.In an application that uses linked SQL Server tables, two different database engines are at work: the Office Access/Jet database engine that runs on the Office Access client and the SQL Server database engine.The interaction of these two engines can sometimes yield results that are inferior to those obtained by using only the Jet database engine with native Office Access tables.Related: "Tools for Migrating Access to SQL Server" and "Securing SQL Server Through Access" For our training project, we chose to upsize an Access system that we had set up for a pharmaceutical company.
This system, which tracked the required courses and physical exams that employees took, was a typical Access database for us in terms of size, complexity, and design.
To add one record to a table, you must use the field list to define which fields to put the data in, and then you must supply the data itself in a value list. For example, the following statement will insert the values "1", "Kelly", and "Jill" into the Customer ID, Last Name, and First Name fields, respectively.
To add many records to a table at one time, use the INSERT INTO statement along with a SELECT statement.
The SQL Server Migration Assistant (SSMA) for Office Access enables you to convert an Office Access database to this type of application by moving your Office Access data to new SQL Server tables and linking to these tables.
Any forms, reports, queries, or code that previously worked with the original Office Access tables are automatically connected to the new SQL Server tables.
Any subsequent changes that you make to the data in Access are reflected in the SQL Server data, and any changes that you make in the SQL Server database are reflected in the linked table in Access.