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Microsoft Access is mainly suitable for meeting end-user database needs and for rapid application development and it is easy enough for end users to create their own queries, forms and reports, laying out fields and groupings, setting formats, etc. This frees up the professional developers to focus on more complex portions of MS Access. Microsoft Access Database is well suited for individual and workgroup use across a network. The number of simultaneous users that can be supported depends on the amount of data, the tasks being performed, level of use, and application design. Generally accepted limits are solutions with 1 GB or less of data. This is appropriate for workgroup and department solutions where the total number of users number a few hundred.
Applications that simply view data or have simple data entry can support considerably more users. Applications that run complex queries or analysis across large datasets would naturally require greater bandwidth and memory. Microsoft Access Database is designed to scale to support more data and users by linking to multiple Access databases. With the latter design, the amount of data and users can scale to enterprise-level solutions.
Microsoft Access also offers the ability for programmers to create Database driven web applications using the programming language. For query development, Access offers a Query Designer, a graphical user interface that allows users to create queries without knowledge of the SQL programming language.
Access also supports the creation of Pass-Through queries. These are queries that can be linked to external data sources through the use of ODBC connections on the local machine. This enables users to interact with data stored outside the Access development without using linked Tables. The Pass-Through queries are written using the SQL syntax supported by the external data source.
As data from a Microsoft Access database can be cached in RAM, processing speed may be significantly better when there is only a single user. In the past, the effect of packet latency on the record locking system caused Access databases to be too slow on Virtual Private Network or Wide Area Network against a Jet database. This is less of an issue now with broadband connections. Performance can also be enhanced if a continuous connection is maintained to the back end database throughout the session rather than opening and closing it for each table access.
