« Create Index on Temp Table Beginning of Month » Creating an index on a table variable can be done implicitly within the declaration of the table variable by defining a primary key and creating unique constraints. The primary key will represent a clustered index, while the unique ...
SQL Copy CREATE UNIQUE INDEX index1 ON schema1.table1 (column1 DESC, column2 ASC, column3 DESC); Key scenario: Starting with SQL Server 2016 (13.x), in Azure SQL Database, and in Azure SQL Managed Instance, you can use a nonclustered index on a columnstore index to improve data...
For example, creating a clustered index on an existing large table would benefit from the ONLINE index option. The ONLINE option allows for concurrent activity on the underlying data to continue while the index is being created or rebuilt. For more information, see Set Index Options. Determine...
A nonclustered index can be stored in the same filegroup as the underlying table, or on a different filegroup. The storage location of indexes can improve query performance by increasing disk I/O performance. For example, storing a nonclustered index on a filegroup that is on a different disk...
SQL Copy CREATE UNIQUE INDEX index1 ON schema1.table1 (column1 DESC, column2 ASC, column3 DESC); Key scenario: Starting with SQL Server 2016 (13.x), in Azure SQL Database, and in Azure SQL Managed Instance, you can use a nonclustered index on a columnstore index to improve data...
SQL Server: New Tools to Diagnose Index Health SQL Server: Achieve High Availability for SQL Server SQL Server: Simplify Database Maintenance with Table Partitions SQL Server: Top Tips for SQL Server Clustering Windows Administration: Inside the Windows Vista Kernel: Part 2 From the Editor: Trophy...
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If you anticipate that a smaller percentage of the variable-length column storage space will be used, you can adjust the Max_Var_Key_Size value by that percentage to yield a more accurate estimate of the overall table size. If there are no variable-length columns, set Variable_Key_Size to...
DataModificationTableReference DataRetentionTableOption DataTypeReference DataTypeSequenceOption DbccCommand DbccNamedLiteral DbccOption DbccOptionKind DbccStatement DeallocateCursorStatement DeclareCursorStatement DeclareTableVariableBody DeclareTableVariableStatement DeclareVariableElement DeclareVariableStatement Def...
If you anticipate that a smaller percentage of the variable-length column storage space will be used, you can adjust the Max_Var_Key_Size value by that percentage to yield a more accurate estimate of the overall table size. If there are no variable-length columns, set Variable_Key_Size to...