количество записей
George Trofimov
Есть ли какое-то ограничение в эхотажных БД на количество записей в
таблице.
Или может быть какие-то другие ограничения? Вроде бы есть ограничение на
максимальное количество полей (255). А что-либо иное? Hапример на размер БД.
Количество таблиц. Количество суммарных записей по всем таблицам... ну вообще
хоть что.
... Bleeding : In Extremo - Neunerle
Andrew Usachov
18 Nov 06 07:46, George Trofimov wrote to All:
http://office.microsoft.com/en-us/access/HP051868081033.aspx
Access specifications
Applies to: Microsoft Office Access 2003
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Microsoft Access database specifications
Access database
Attribute Maximum
Microsoft Access database (.mdb) (Microsoft Access database: A collection of
data and objects (such as tables, queries, or forms) that is related to a
particular topic or purpose. The Microsoft Jet database engine manages the
data.) file size 2 gigabytes minus the space needed for system objects (system
object: Database objects that are defined by the system, such as the table
MSysIndexes, or by the user. You can create a system object by naming the
object with USys as the first four characters in the object name.).
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
Number of characters in a user name or group name 20
Number of concurrent users 255
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 2048; the actual number may be less because of tables
opened internally by Microsoft 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
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
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 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 ANDs in a WHERE or HAVING clause 99
Number of characters in an SQL statement approximately 64,000
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 (Design view: A
window that shows the design of these database objects: tables, queries, forms,
reports, macros, and data access pages. In Design view, you can create new
database objects and modify the design of existing ones.)) 200 in. (508 cm)
Number of levels of nested forms or reports 7
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
Attribute Maximum
Number of actions in a macro (macro: An action or set of actions that you can
use to automate tasks.) 999
Number of characters in a condition (condition: Part of the criteria that a
field must meet for searching or filtering. Some conditions must be used with a
value; for example, the field Author with the condition equals with the value
Jane.) 255
Number of characters in a comment 255
Number of characters in an action argument (action argument: Additional
information required by some macro actions. For example, the object affected by
the action or special conditions under which the action is carried out.) 255
Microsoft Access project specifications
Access project
Attribute Maximum
Number of objects in a Microsoft Access project (.adp) (Microsoft Access
project: An Access file that connects to a Microsoft SQL Server database and is
used to create client/server applications. A project file doesn't contain any
data or data-definition-based objects such as tables and views.) 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 columns in a table 250 (Microsoft SQL Server 6.5)
1024 (Microsoft SQL Server 7.0 and 2000)
HideMicrosoft SQL Server database
Microsoft SQL Server maximum capacity specifications are described in the SQL
Server documentation. For more information about SQL Server Books Online, see
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/startsql/getst
art_4fht.asp, on the MSDN Web site.
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 (Design view: A
window that shows the design of these database objects: tables, queries, forms,
reports, macros, and data access pages. In Design view, you can create new
database objects and modify the design of existing ones.)) 200 in. (508 cm)
Number of levels of nested forms or reports 7
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
Attribute Maximum
Number of actions in a macro (macro: An action or set of actions that you can
use to automate tasks.) 999
Number of characters in a condition (condition: Part of the criteria that a
field must meet for searching or filtering. Some conditions must be used with a
value; for example, the field Author with the condition equals with the value
Jane.) 255
Number of characters in a comment 255
Number of characters in an action argument (action argument: Additional
information required by some macro actions. For example, the object affected by
the action or special conditions under which the action is carried out.) 255
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