Access 2010 specifications

This article has information about the limits of Microsoft Access database files and objects. In most cases when a database exceeds the following limits it might be an indication of a design issue. Using the information in this article and a careful examination of your database design might help you locate what needs to be corrected for successful implementation. For example, importing data directly from Microsoft Excel into Access without normalization can result in creation of additional fields (columns). If you’d like information about designing databases or normalization, take a look at the resources in the Additional information section.

In this article


Database specifications

The following list of tables applies to Microsoft Access 2010 and Access 2007 databases:

General

Attribute Maximum
Total size for an Access 2010 database (.accdb), including all database objects and data

2 gigabytes, minus the space needed for system objects.

 Note   You can work around this size limitation by linking to tables in other Access databases. You can link to tables in multiple database files, each of which can be as large as 2GB.

 Tip    For more information on reducing the size of your database, see Help prevent and correct database file problems by using Compact and Repair.

Total 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
Number of characters in a user name or group name 20
Number of concurrent users 255

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Table

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 2,048 including linked tables and the 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;
1 gigabyte of character storage when entering data programmatically
Size of an OLE Object field 1 gigabyte
Number of indexes in a table 32 including indexes created internally to maintain table relationships, single-field and composite indexes.
Number of fields in an index or primary key 10
Number of characters in a validation message 255
Number of characters in a validation rule including punctuations and operators 2,048
Number of characters in a field or table 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
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*

*Maximum values might be lower if the query includes multivalued lookup fields.

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Form and Report

Attribute Maximum
Number of characters in a label 2,048
Number of characters in a text box 65,535
Form or report width 22,75 in. (57.79 cm)
Section height 22.75 in. (57.79 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 65,536
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 (both .accdb and .adp) 32,750

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Macro

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

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Project specifications

The following list of tables applies to Access 2010 and Access 2007 projects:

General

Attribute Maximum
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)

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Form and Report

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
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 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 .accdb and .adp) 32,750

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Macro

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

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Additional information

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Applies to:
Access 2010