DataBaseZone.com
Conrad Muller
Juneau, Alaska

Email: conrad at
databasezone
dot com

Microsoft Access 2007 - 2010 Maximum Capacities

These figures are taken from Microsoft sources and published here for the convienience of my students and clients.

I don't build full applications in Access any more, but it is excellent for prototypes, and under some circumstances it works well as a front end with SQL Server as a back end. When used as a front end to SQL Server, the Access application should be an Access project.

Database specifications  
Attribute Maximum
Database (.mdb) file size

2 GB total for all objects in the database (data, forms, reports, indices, macros, modules, etc.)

Because your database application can be linked to tables in other mdb files or to SQL Server, application data storage can be considerably larger.

Number of objects in a database 32,768
Modules (including forms and reports with the HasModule property set to True) 1,000
Number of characters in an object name 64
Number of characters in a password 14 (for MS Access 2003)
20 (for MS Access 2007+)
Number of characters in a user name or group name 20
Number of concurrent users 255
   
Table specifications  
Attribute Maximum
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 will be fewer because of tables opened internally by Microsoft Access.
Table size 2 GB 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; 1 GB when entering data programmatically.
Size of an OLE Object field 1 GB
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 2048
Number of characters in a table or field description 255
Number of characters in a record (excluding Memo and OLE Object fields) 4,000; 2,000 for Access 2000 and 2002
Number of characters in a field property setting 255
   
Query specifications  
Attribute Maximum
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 fields in a recordset 255
Recordset size 1 GB
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 ANDs in a WHERE or HAVING clause 99
Number of characters in a SQL statement approximately 64,000
   
Form and report specifications  
Attribute Maximum
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; 3 for Access 2000 and 2002
Number of fields or expressions 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 65,536
Number of controls and sections 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 (both .mdb and .adp) 32,750
   
Macro specifications  
Attribute Maximum
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

My (Conrad Muller's) work on this page is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 2.5 License.

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