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No limit for a hash index, as long as all index keys fit in-row. The non-key columns might help some queries perform better.īytes per index key for memory-optimized tablesĢ500 bytes for a nonclustered index. In a nonclustered index, you can include extra non-key columns, and they do not count against the size limit of the key. However, the combined sizes of the data in those columns can never exceed the limit. You can define a key using variable-length columns whose maximum sizes add up to more than the limit. For a nonclustered index key, the maximum is 1700 bytes. The maximum number of bytes in a clustered index key cannot exceed 900 in SQL Server. Before SQL Server 2016, all versions supported 900 bytes for all index types. The default packet size is 4 KB, and is controlled by the network packet size configuration option.īyte length of a string containing Transact-SQL statements (batch size)ĩ00 bytes for a clustered index.
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Network packet size is the size of the tabular data stream (TDS) packets used to communicate between applications and the relational Database Engine. Maximum sizes/numbers SQL Server (64-bit) Maximum sizes and numbers of various objects defined in SQL Server databases or referenced in Transact-SQL statements.
SQL SERVER 2012 ENTERPRISE EDITION KEY SOFTWARE
Hardware and software requirements for installing SQL Server.In addition to the information in this article, you might also find the following links helpful: