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. Remove Index From Tables To removeINDEXfrom a table, we can use theDROP ...
其中包括用户定义类型变量或函数以及用户定义函数,但不能引用 Transact-SQL 语句。 partition_number 必须存在,否则,该语句将失败。 WITH ( <single_partition_rebuild_index_option> ) SORT_IN_TEMPDB、MAXDOP、DATA_COMPRESSION和XML_COMPRESSION 是使用 (PARTITION = partition_number) 语法重新生成单个分区时可以指定...
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> ...
SQL USEmaster; GO-- In this example, OBJECT_ID is evaluated in the context of the master database.-- Because Person.Address does not exist in master, the function returns NULL.-- When NULL is specified as an object_id, all objects in the database are r...
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,...
SQL INSERT example, C-2 SQL*Loader example, C-3 loading thesaurus, 11-2 LOB columns loading, C-3 LOG_DIRECTORY system parameter, 2-74, 8-4 LOGFILENAME procedure, 8-4 logging index requests, 8-6 logical operators with NEAR, 3-32 LONG columns indexing, 1-22 long_wor...
For more information, seeDynamic Management Views and Functions (Transact-SQL). Examples A. Returning information for a specified table The following example returns information for all indexes and partitions of thePerson.Addresstable in the AdventureWorks2022 database. Executing this query requires, at...
PL/SQL, 17-2, 17-6 contrasted with procedures, 1-55, 17-2 DETERMINISTIC, 20-8 parallel execution, 23-47 privileges for, 27-7 roles, 27-20 See also procedures SQL, 15-3 COUNT, 10-38 default column values, 10-9 in CHECK constraints, 25-21 in views, 10-15 NVL...
在SQL Server 2012 (11.x) 和 SQL Server 2014 (12.x) 中,无法在列存储索引上创建非聚集索引。 SQL --Create the table for use with this example.CREATETABLEdbo.SimpleTable ( ProductKey [INT]NOTNULL, OrderDateKey [INT]NOTNULL, DueDateKey [INT]NOTNULL, ShipDateKey [INT]NOTNULL); GO--Cre...
In Object Explorer, connect to an instance of Database Engine. On the Standard bar, click New Query. Copy and paste the following example into the query window and click Execute. SQL Copy USE AdventureWorks2022; GO -- Drops and re-creates the IX_Employee_OrganizationLevel_OrganizationNode ...