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

Project specifications

Additional information

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



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