);-- create unique indexCREATEUNIQUEINDEXcollege_indexONColleges(college_code); Here, the SQL command creates a unique index namedcollege_indexon theCollegestable using thecollege_codecolumn. Note:Although the index is created for only unique values, the original data in the table remains unaltered...
Columnstore index in SQL Server 2017 (14.x) and older versions only. Later versions support online rebuild of columnstore indexes. REBUILD PARTITION = <partition_number> Nonpartitioned index, XML index, spatial index, or disabled index REORGANIZE Indexes with ALLOW_PAGE_LOCKS set to OFF ...
Using the keyword ALL with this operationFails if the table has one or more REBUILD WITH ONLINE = ON XML indexSpatial indexColumnstore index in SQL Server 2017 (14.x) and older versions only. Later versions support online rebuild of columnstore indexes. REBUILD PARTITION = <partition_number> ...
To see which indexes the query optimizer uses for a specific query, in SQL Server Management Studio, on the Query menu, select Include Actual Execution Plan.Don't always equate index usage with good performance, and good performance with efficient index use. If using an index always help...
embedding in PL/SQL, 15-20 locks, 24-29 parallel DDL, 23-3 parsing with DBMS_SQL, 15-20 processing statements, 15-15 roles and privileges, 27-21 data dictionary access to, 2-3 adding objects to, 2-5 ALL prefixed views, 2-6 audit trail (SYS.AUD$), 2-5 backups...
Total_Number_Of_ObjectCells_In_Level1_In_Index Number of cell instances of indexed objects that are tessellated with level 1 precision. This is a core property. Value isbigint. Total_Number_Of_ObjectCells_In_Level2_In_Index Number of cell instances of indexed objects that are tessellated wit...
SQL Copy EXEC sp_estimate_data_compression_savings 'Production', 'TransactionHistory', NULL, NULL, 'ROW'; ALTER TABLE Production.TransactionHistory REBUILD PARTITION = ALL WITH (DATA_COMPRESSION = ROW); GO Enable compression on an index In Object Explorer, connect to an instance of Database...
Requires VIEW SERVER PERFORMANCE STATE permission on the server. Examples The following examples illustrate how to use thesys.dm_db_missing_index_group_statsdynamic management view. Learn more about guidance for using missing indexes intune nonclustered indexes with missing index suggestions. ...
embedded SQL, 14-6 listener process and, 7-14 restricting, 5-5 sessions contrasted with, 7-4 usernames, 25-2 with administrator privileges, 5-3 consistency of data, 1-52 multiversion consistency model, 1-21 See also read consistency constants comparisons and, 20-14 in sto...
It is the functional index defined on the virtual column of values from the SQL data type array that forms the multi-valued index. The examples in the following list show the three different ways in which a multi-valued index zips can be created on an array $.zipcode on a JSON column...