How to Migrate your Database from MS Access To MS SQL Server
We all have limits, and an Access database is no exception. For example, an Access database has a size limit of 2 GB and can't support more than 255 concurrent users. So when it's time for your Access database to go to the next level, you can migrate to SQL Server. SQL Server (whether on-premises or in the Azure cloud) supports larger amounts of data, more concurrent users, and has greater capacity than the JET/ACE database engine. This guide gives you a smooth start to your SQL Server journey, helps preserve Access front-end solutions you created, and hopefully motivates you to use Access for future database solutions. The Upsizing Wizard was removed from Access in Access 2013, so now you can use the Microsoft SQL Server Migration Assistant (SSMA). To successfully migrate, follow these stages.

About split databases
All Access database objects can either be in one database file, or they can be stored in two database files: a front-end database and a back-end database. This is called splitting the database and is designed to facilitate sharing in a network environment. The back-end database file must only contain tables and relationships. The front-end file must only contain all other objects, including forms, reports, queries, macros, VBA modules, and linked tables to the back-end database. When you migrate an Access database, it's similar to a split database in that SQL Server is acting as a new back-end for the data that is now located on a server.

As a result, you can still maintain the front-end Access database with linked tables to the SQL Server tables. Effectively, you can derive the benefits of rapid application development that an Access database provides, along with the scalability of SQL Server.

SQL Server benefits
Still need some convincing to migrate to SQL Server? Here are some additional benefits to think about:

More concurrent users SQL Server can handle many more concurrent users than Access and minimizes memory requirements when more users are added.

Increased availability With SQL Server, you can dynamically backup, either incremental or complete, the database while it's in use. Consequently, you do not have to force users to exit the database to back up data.

High performance and scalability The SQL Server database usually performs better than an Access database, especially with a large, terabyte-sized database. Also, 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.

Improved security Using a trusted connection, SQL Server integrates with Windows system security to provide a single integrated access to the network and the database, employing the best of both security systems. This makes it much easier to administer complex security schemes. SQL Server is the ideal storage for sensitive information such as Social Security numbers, credit card data, and addresses that are confidential.

Immediate recoverability If the operating system crashes or the power goes out, SQL Server can automatically recover the database to a consistent state in a matter of minutes and with no database administrator intervention.

Usage of VPN Access and Virtual Private Networks (VPN) don’t get along. But with SQL Server, remote users can use still use the Access front-end database on a desktop and the SQL Server back-end located behind the VPN firewall.

Azure SQL Server In addition to the benefits of SQL Server, offers dynamic scalability with no downtime, intelligent optimization, global scalability and availability, elimination of hardware costs, and reduced administration.

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