Microsoft Access 2016, 2019 and 365 Maximum Limits and Specifications
Applies to: Microsoft® Access® 2016, 2019 and 365 Windows (Desktop)
Below is a list of Microsoft Access 2016 maximum limits and specifications.
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Access Database and Objects Maximum Limits and Specifications
Microsoft Access database: Maximum size of 2 gigabytes (includes all objects minus the space needed for system objects all database objects and data). You can work around this size limitation by linking to tables in other Access databases or link to tables in multiple database files (each of which can be as large as 2GB).
Total number of objects in a database: 32,768 objects
Number of modules (including forms and reports that have the HasModule property set to True): 1,000 modules
Number of characters in an object name: 64 characters
Number of characters in a password: 14 characters
Number of characters in a user name or group name: 20 characters
Number of concurrent users: 255 users
Access Tables Maximum Limits and Specifications
Number of characters in a table name: 64 characters
Number of characters in a field name: 64 characters
Number of fields in a table: 255 fields
Number of open tables: 2,048 tables (including linked tables and the tables opened internally by Access)
Table size: Maximum of 2 gigabytes (minus the space needed for the system objects)
Number of characters in a Text field: 255 characters
Number of characters in a Long Text field: 65,535 characters when entering data through the user interface or 1 gigabyte of character storage when entering data programmatically
Size of an OLE Object field: 1 gigabyte
Number of indexes in a table: 32 indexes including indexes created internally to maintain table relationships, single-field and composite indexes
Number of fields in an index or primary key: 10 fields
Number of characters in a validation message: 255 characters
Number of characters in a validation rule including punctuations and operators: 2,048 characters
Number of characters in a field or table description: 255 characters
Number of characters in a record (excluding Long Text and OLE Object fields) when the UnicodeCompression property of the fields is set to Yes: 4,000 characters
Number of characters in a field property setting: 255 characters
Access Queries Maximum Limits and Specifications
Number of enforced relationships: Maximum of 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 tables
Number of joins in a query: 16 joins
Number of fields in a recordset: 255 fields
Recordset size: 1 gigabyte
Sort limit: 255 characters in one or more fields
Number of levels of nested queries: 50 levels
Number of characters in a cell in the query design grid: 1,024 characters
Number of characters for a parameter in a parameter query: 255 characters
Number of AND operators in a WHERE or HAVING clause: 99 operators
Number of characters in an SQL statement: 64,000 characters
NOTE: In queries, maximum values might be lower if the query includes multivalued lookup fields.
Access Forms and Reports Maximum Limits and Specifications
Number of characters in a label: 2,048 characters
Number of characters in a text box: 65,535 characters
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 levels
Number of fields or expressions that you can sort or group on in a report: 10 fields or expressions
Number of headers and footers in a report: Limited to 1 report header/footer, 1 page header/footer and 10 group headers/footers
Number of printed pages in a report: 65,536 pages
Number of controls and sections that you can add over the lifetime of the form or report: 754 controls and sections
Number of characters in an SQL statement that serves as the Recordsource or Rowsource property of a form, report, or control: 32,750 characters
Access Macros Maximum Limits and Specifications
Number of actions in a macro: 999 actions
Number of characters in a condition: 255 characters
Number of characters in a comment: 255 characters
Number of characters in an action argument: 255 characters
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