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As we see on Fig. All settings for copying conversion are made. The next screen shows the preparation for the launch of the package configuration Fig. If at the preceding steps everything was done correctly, then the window appears Fig. The next step is a converting data, the progress and the result of which is shown in the window in Figure MS Access database was placed on the disc in the following path:.
The resulting database is formed in the system folder of MS SQL Server and includes two files, which placed in the following way:. Now, we can use this database at programming of applications in MS Visual Studio and also we can use database in other systems of visual development of applications.
Optionally save connection settings and configuration parameters into the session file to schedule the launching of sync or migration jobs regularly. Read more about execution stage available options. A session keeps Access source and SQL Server target database connection settings with other specified options.
Our applications come with a built-in scheduler to run database migration and sync jobs at specified times. Just set the scheduled date and time to execute job sessions automatically. Find more Information about built-in scheduler. The SQL Server database usually performs much better than an Access database, especially with a large, terabyte-sized database. Microsoft says the Access database cannot support more than concurrent users.
By default, SQL Server allows a maximum of concurrent connections, the maximum number of users who can simultaneously log in to the SQL server instance. SQL Server processes queries much faster and efficiently by processing queries in parallel, using multiple native threads within a single process to handle user requests. There are some workarounds, such as Remote Desktop Connection, but these systems are always expensive to build and maintain.
In most cases, it also shows poor performance. SQL Server can be easily configured for accessing over the Internet. Thus, employees, partners, and customers can exchange information and update it in real-time, wherever there is Internet access. Overgrown Access databases can often crash and become corrupted. Let's say an operating system crash or power outage occurs. In this case, SQL Server can automatically restore the database to a consistent state in minutes and without the database administrator's intervention.
If the database is in. Back up your database. For more information, see Protect your data with backup and restore processes. Tip Consider installing Microsoft SQL Server Express edition on your desktop which supports up to 10 GB and is a free and easier way to run through and check your migration. When you connect, use LocalDB as the database instance. Tip If possible, use a stand-alone version of Access. SSMA mainly migrates tables and select queries with no parameters.
Forms, reports, macros, and VBA modules are not converted. These two connections are saved in your migration file should you decide to transfer additional objects in the future. Note The migration process can take some time depending on the size of your database objects and the amount of data that must be transferred. Make sure you install the appropriate 32 or 64 bit version for your computer.
After installing SSMA, open it on your desktop, preferably from the computer with the Access database file. You can also open it on a machine that has access to the Access database from the network in a shared folder. Follow the beginning instructions in SSMA to provide basic information such as the SQL Server location, the Access database and objects to migrate, connection information, and whether you want to create linked tables.
The rowversion field helps avoid record conflicts. Access uses this rowversion field in an SQL Server linked table to determine when the record was last updated.
Also, if you add the rowversion field to a query, Access uses it to re-select the row after an update operation. This improves efficiency by helping to avoid write conflict errors and record deletion scenarios that can happen when Access detects different results from the original submission, such as might occur with floating point number data types and triggers that modify columns. However, avoid using the rowversion field in forms, reports, or VBA code.
For more information, see rowversion. Note Avoid confusing rowversion with timestamps. Although the keyword timestamp is a synonym for rowversion in SQL Server, you can't use rowversion as a way to timestamp a data entry. For example, if you only store English text, you can use the varchar rather than nvarchar data type. As a best practice, use the SSMA assessment report, which shows the conversion results, including errors, warnings, informational messages, time estimates for performing the migration, and individual error correction steps to take before you actually move the objects.
Converting database objects takes the object definitions from the Access metadata, converts them into equivalent Transact-SQL T-SQL syntax , and then loads this information into the project.
Tip Once you have successfully migrated your Access database, save the project file for later use, so you can migrate your data again for testing or final migration.
You can install the drivers on each computer where the converted database is used. After you migrate the Access tables, you can link to the tables in SQL Server which now hosts your data. Linking directly from Access also provides you with a simpler way to view your data rather than using the more complex SQL Server management tools. You can query and edit linked data depending on the permissions set up by your SQL Server database administrator.
Tip Don't forget to use the Linked Table Manager in Access to conveniently refresh and relink tables. For more information, see Manage linked tables. The following sections describe common issues you can encounter during migration and how to deal with them. Only Select Queries are converted; other queries are not, including Select Queries that take parameters.
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