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Microsoft Access specification sheet to help know the scope and limitations...
The following Access specification facts and figures are divided into object types and focuses on the Access database 'JET' engine (standard Access).Unless stated, the following tables apply to all versions from 2003 through to 2010. General | Attribute | Maximum / Comments | Access Database File Size
(.MDB and .ACCDB) | 2 gigabytes, minus the space needed for system objects NOTE: Although the maximum size for a single database file is 2GB, you can work around this limitation by using a split database. A front-end database file can point to thousands of back-end database files, each of which could be as large as 2GB. For more information, see the topic, Split a database.
| | Number of objects in a database | 32,768
| | Number of modules (including forms and reports that have the HasModule property set to True) | 1,000
| | Number of characters in an object name | 64
| | Number of characters in a password | 14 for .MDB and 20 for .ACCDB
| | Number of characters in a user name or group name | 20
| | Number of concurrent users | 255
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Table | Attribute | Maximum / Comments | | Number of characters in a table name | 64
| | Number of characters in a field name | 64
| | Number of fields in a table | 255
| | Number of open tables | 2048; the actual number might be smaller because of tables opened internally by Access
| | Table size | 2 gigabyte minus the space needed for the system objects
| | Number of characters in a Text field | 255
| | Number of characters in a Memo field | 65,535 when entering data through the user interface;
2 gigabytes of character storage when entering data programmatically
| | Size of an OLE Object field | 1 gigabyte
| | Number of indexes in a table | 32
| | Number of fields in an index | 10
| | Number of characters in a validation message | 255
| | Number of characters in a validation rule | 2,048
| | Number of characters in a table or field description | 255
| | Number of characters in a record (excluding Memo and OLE Object fields) when the UnicodeCompression property of the fields is set to Yes | 4,000
| | Number of characters in a field property setting | 255
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Query | Attribute | Maximum / Comments | | Number of enforced relationships | 32 per table, minus the number of indexes that are on the table for fields or combinations of fields that are not involved in relationships* | | Number of tables in a query | 32* | | Number of joins in a query | 16* | | Number of fields in a recordset | 255 | | Recordset size | 1 gigabyte | | Sort limit | 255 characters in one or more fields | | Number of levels of nested queries | 50* | | Number of characters in a cell in the query design grid | 1,024 | | Number of characters for a parameter in a parameter query | 255 | | Number of AND operators in a WHERE or HAVING clause | 99* | | Number of characters in an SQL statement | Approximately 64,000* | *Access specification - maximum values might be lower if the query includes multivalued (from version 2007) lookup fields.
Form and Report | Attribute | Maximum / Comments | | Number of characters in a label | 2,048 | | Number of characters in a text box | 65,535 | | Form or report width | 22 in. (55.87 cm) | | Section height | 22 in. (55.87 cm) | | Height of all sections plus section headers (in Design view) | 200 in. (508 cm) | | Number of levels of nested forms or reports | 7 | | Number of fields or expressions that you can sort or group on in a report | 10 | | Number of headers and footers in a report | 1 report header/footer;
1 page header/footer;
10 group headers/footers | | Number of printed pages in a report | 35,536 | | Number of controls and sections that you can add over the lifetime of the form or report | 754 | | Number of characters in an SQL statement that serves as the Recordsource or Rowsource property of a form, report, or control (.mdb, .accdb and .adp) | 32,750 |
Macro | Attribute | Maximum / Comments | | Number of actions in a macro | 999
| | Number of characters in a condition | 255
| | Number of characters in a comment | 255
| | Number of characters in an action argument | 255
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Access Project (.adp) | Attribute | Maximum / Comments | | Number of objects in an Access project (.adp) | 32,768 | | Number of modules (including forms and reports that have the HasModule property set to True) | 1,000 | | Number of characters in an object name | 64 | | Number of columns in a table | 250 (Microsoft SQL Server 6.5)
1024 (Microsoft SQL Server 7.0, 2000 and 2005) | Forms, Reports and Macros for .adp files have the same Access specification as .mdb/.accdb files.
The Access specification above should provide a useful resource especially when programming Microsoft Access using VBA. The number of objects used especially for the heavier duty forms and reports can sometimes be a restriction and have had to use some work arounds to resolve the problem.
Return from Access Specification to About Access Databases home page
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Links Access Books & DVD's Access Database Tutorial Blog Learning SEO Optimization | Finding Keyword Phrases Audiences Reviews - Books The following books are my personal recommendations for all levels of Access database users and developers. Enjoy!
Access Macros eBookIt covers versions from 2000 through to 2010 which has some very interesting and new powerful features. Beginner or not, there is something for everyone and Microsoft now encourages developers to use Access macros as the first choice option to automate your database.
Access 2007 for dummiesThis is a great book for beginners. It takes you through from the very beginning without too much jargon 'computer' talk and adds a little humour to your learning. This is one of my favourites and is a starter recommendation for my students.
Access 2010 BibleGet the Access 2010 information you need to succeed with this comprehensive reference. If this is your first encounter with Access, you'll appreciate the thorough attention to database fundamentals and terminology. You’ll want to keep this soup-to-nuts Access reference close at hand!
Beginning Access 2007 VBAThis book provides you with the tools and techniques you’ll need in order to build more sophisticated solutions. After walking through the features of Access 2007 VBA, you’ll learn all about object–oriented programming and ADO. Two comprehensive case studies presents you with the hands–on experience in building real–world solutions using the concepts covered in the book. It's the one I use as a reference for VBA students!
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