Clustered index, if the underlying table contains LOB data types (image, ntext, text) and spatial data types varchar(max) and varbinary(max) columns can't be part of an index key. In SQL Server (starting with SQ
Hash indexes are one of the possible index types in a memory-optimized table. For more information, see Indexes on Memory-Optimized Tables. Applies to: SQL Server, Azure SQL Database, and Azure SQL Managed Instance. Hash index architecture A hash index consists of an array of pointers, a...
如需詳細資訊,請參閱 SQL Server 和 Azure SQL 索引架構和設計指南。 Azure Synapse Analytics 和 Analytics Platform System (PDW) 目前不支援唯一條件約束。 任何參考唯一條件約束的範例僅適用於 SQL Server、Azure SQL Database 和 Azure SQL 受控實例。 如需索引設計指導方針的相關信息,請參閱 SQL Server 索引...
Applies to: SQL Server 2005 through SQL Server 2012 unless noted otherwise.This guide assumes the reader has a general understanding of the index types available in SQL Server. For a general description of index types, see Index Types.In
Clustered index, if the underlying table contains LOB data types (image, ntext, text) and spatial data types varchar(max) and varbinary(max) columns can't be part of an index key. In SQL Server (starting with SQL Server 2012 (11.x)), in Azure SQL Database and in Azure SQL Managed ...
IHindextypes (Transact-SQL) บทความ 01/03/2566 Applies to:SQL Server TheIHindextypessystem table contains one row for each non-SQL Server index type supported for non-SQL Server Publishers. This table is stored in the distribution database. ...
LOB data types (the (max) length data types) can't be the key of an ordered nonclustered columnstore index. When creating an ordered nonclustered columnstore index, use the MAXDOP = 1 options for the highest quality sorting, in exchange for a significantly longer duration of the CREATE INDE...
For more information, see Data Types (Transact-SQL). lob_fetch_in_bytes bigint Cumulative count of LOB data bytes retrieved. lob_orphan_create_count bigint Cumulative count of orphan LOB values created for bulk operations. 0 = Nonclustered index lob_orphan_insert_count bigint Cumulative count...
To set different types of data compression for different partitions, specify theDATA_COMPRESSIONoption more than once, for example: SQLCopy --For rowstore tablesREBUILDWITH( DATA_COMPRESSION =NONEONPARTITIONS(1), DATA_COMPRESSION =ROWONPARTITIONS(2,4,6TO8), DATA_COMPRESSION = PAGEONPARTITIONS(3,...
By specifying n boundary values v1through vnof the given type, this function defines n+1 partitions. A maximum of 1000 partitions can be created this way. The type the function is based on must be of an integral SQL type, LOB’s, xml, timestamp and user defined types are...