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Maximum Capacity Specifications

SQL Server 2000

  Topic last updated -- January 2004

The first table specifies maximum capacities that are the same for all editions of Microsoft® SQL Server™ 2000. The second and third tables specify capacities that vary by edition of SQL Server 2000 and the operating system.

This table specifies the maximum sizes and numbers of various objects defined in Microsoft SQL Server databases, or referenced in Transact-SQL statements. The table does not include Microsoft SQL Server 2000 Windows® CE Edition.

  Maximum sizes/numbers
Object SQL Server 7.0 SQL Server 2000
Batch size 65,536 * Network Packet Size1 65,536 * Network Packet Size1
Bytes per sort string column 8,000 8,000
Bytes per text, ntext, or image column 2 GB-2 2 GB-2
Bytes per GROUP BY, ORDER BY 8,060 8,060
Bytes per index 900 9002
Bytes per foreign key 900 900
Bytes per primary key 900 900
Bytes per row 8,060 8,060
Bytes in source text of a stored procedure Lesser of batch size or 250 MB Lesser of batch size or 250 MB
Clustered indexes per table 1 1
Columns in GROUP BY, ORDER BY Limited only by number of bytes per GROUP BY, ORDER BY Limited only by number of bytes per GROUP BY, ORDER BY
Columns or expressions in a GROUP BY WITH CUBE or WITH ROLLUP statement 10
Columns per index 16 16
Columns per foreign key 16 16
Columns per primary key 16 16
Columns per base table 1,024 1,024
Columns per SELECT statement 4,096 4,096
Columns per INSERT statement 1,024 1,024
Connections per client Maximum value of configured connections Maximum value of configured connections
Database size 1,048,516 TB3 1,048,516 TB3
Databases per instance of SQL Server 32,767 32,767
Filegroups per database 256 256
Files per database 32,767 32,767
File size (data) 32 TB 32 TB
File size (log) 4 TB 32 TB
Foreign key table references per table 253 253
Identifier length (in characters) 128 128
Instances per computer N/A 16
Length of a string containing SQL statements (batch size) 65,536 * Network packet size1 65,536 * Network packet size1
Locks per connection Max. locks per server Max. locks per server
Locks per instance of SQL Server 2,147,483,647 (static)
40% of SQL Server memory (dynamic)
2,147,483,647 (static)
40% of SQL Server memory (dynamic)
Nested stored procedure levels 32 32
Nested subqueries 32 32
Nested trigger levels 32 32
Nonclustered indexes per table 249 249
Objects concurrently open in an instance of SQL Server4 2,147,483,647 (or available memory) 2,147,483,647 (or available memory)
Objects in a database 2,147,483,6474 2,147,483,6474
Parameters per stored procedure 1,024 2,100
REFERENCES per table 253 253
Rows per table Limited by available storage Limited by available storage
Tables per database Limited by number of objects in a database4 Limited by number of objects in a database4
Tables per SELECT statement 256 256
Triggers per table Limited by number of objects in a database4 Limited by number of objects in a database4
UNIQUE indexes or constraints per table 249 nonclustered and 1 clustered 249 nonclustered and 1 clustered

1 Network Packet Size is the size of the tabular data scheme (TDS) packets used to communicate between applications and the relational database engine. The default packet size is 4 KB, and is controlled by the network packet size configuration option.
2 The maximum number of bytes in any key cannot exceed 900 in SQL Server 2000. You can define a key using variable-length columns whose maximum sizes add up to more than 900, provided no row is ever inserted with more than 900 bytes of data in those columns. For more information, see Maximum Size of Index Keys.
3 The data portion of a database cannot exceed 2 GB in size when using the SQL Server 2000 Desktop Engine (MSDE 2000) or the Microsoft Data Engine (MSDE) 1.0. The total size of the database, including log files, can exceed 2 GB provided the sum of the sizes of the data files remains 2 GB or lower.
4 Database objects include all tables, views, stored procedures, extended stored procedures, triggers, rules, defaults, and constraints. The sum of the number of all these objects in a database cannot exceed 2,147,483,647.

Maximum Numbers of Processors Supported by the Editions of SQL Server 2000

This table shows the maximum number of processors that the database engine in each SQL Server 2000 edition can use on symmetric multiprocessing (SMP) computers. You can install an edition of SQL Server on a computer that has more processors than the database engine will use, but the database engine will not use more processors than is indicated in this table. For example, you can install SQL Server Standard Edition on an eight-processor computer running Windows 2000 Advanced Server, but the database engine will not use more than four of the processors.




Operating System


Enterprise Edition


Standard Edition


Personal Edition


Developer Edition


Desktop Engine (MSDE 2000)


SQL Server CE
Enterprise Evaluation Edition
Microsoft Windows 2000 DataCenter 32 4 2 32 2 N/A 32
Windows 2000 Advanced Server 8 4 2 8 2 N/A 8
Windows 2000 Server 4 4 2 4 2 N/A 4
Windows 2000 Professional N/A N/A 2 2 2 N/A 2
Microsoft Windows NT® 4.0 Server, Enterprise Edition 8 8 2 8 2 N/A 8
Windows NT 4.0 Server 4 4 2 4 2 N/A 4
Windows NT 4.0 Workstation N/A N/A 2 2 2 N/A 2
Microsoft Windows 98 N/A N/A 1 Use Desktop Engine 1 N/A N/A
Microsoft Windows CE N/A N/A N/A N/A N/A 1 N/A

Maximum Amount of Physical Memory Supported by the Editions of SQL Server 2000

This table shows the maximum amount of physical memory, or RAM, that the database engine in each SQL Server 2000 edition can support.




Operating System


Enterprise Edition


Standard Edition


Personal Edition


Developer Edition


Desktop Engine (MSDE 2000)


SQL Server CE
Enterprise Evaluation Edition
Windows 2000 DataCenter 64 GB 2 GB 2 GB 64 GB 2 GB N/A 64 GB
Windows 2000 Advanced Server 8 GB 2 GB 2 GB 8 GB 2 GB N/A 8 GB
Windows 2000 Server 4 GB 2 GB 2 GB 4 GB 2 GB N/A 4 GB
Windows 2000 Professional N/A N/A 2 GB 2 GB 2 GB N/A 2 GB
Windows NT 4.0 Server, Enterprise Edition 3 GB 2 GB 2 GB 3 GB 2 GB N/A 3 GB
Windows NT 4.0 Server 2 GB 2 GB 2 GB 2 GB 2 GB N/A 2 GB
Windows NT 4.0 Workstation N/A N/A 2 GB 2 GB 2 GB N/A 2 GB

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