A view is nothing but a stored query, if you are going to create an index on it, then the index is going to use that query and execute it on that table, in this case you have to make sure that the table does not change underneath. Thus by enforcing this constraint SQL Server makes...
on 表名 (字段名1,字段名2 ...) 例:(为 "商品管理数据库"中“商品信息表”的“商品类型名”字段创建一个名为“IX_商品类型表_商品类型名”的非聚集唯一索引) use 商品管理数据库 go create unique nonclustered index IX_商品类型表_商品类型名 on 商品类型表(商品类型名) --查看索引-- exec sp_helpi...
ON{table|view}:指定索引所属的数据表或视图。 column:指定索引基于的一个字段或多个字段(即一列或多列)。指定两个或多个列名,可为指定字段的组合值创建组合索引。{table|view}后的括号中,按排序优先级列出组合索引中要包括的字段。一个组合索引键中最多可组合16个字段(即16列)。组合索引 键中的所有字段必须...
當database_name是目前資料庫或database_nametempdb,且table_or_view_name開頭#為時,SQL 資料庫 支援三部分名稱格式<database_name>.[schema_name].。REBUILD [ WITH ( <rebuild_index_option> [ ,... n ] ] ]適用於:SQL Server 2012 (11.x) 和更新版本,以及 Azure SQL 資料庫指定使用相同的數據行、...
ON 指定要删除并重新生成现有索引,其必须具有相同名称作为参数 index_name。 OFF 指定不删除和重新生成现有的索引。 如果指定的索引名称已经存在,SQL Server 将显示一个错误。 ONLINE = {ON |OFF}:表示建立索引时是否允许正常访问,即是否对表进行锁定。默认为 OFF。
table_or_view_name要建立索引之資料表或檢視的名稱。必須利用 SCHEMABINDING 定義檢視表,才能在該檢視表上建立索引。 必須先在檢視表上建立唯一叢集索引,才能建立任何非叢集索引。 如需有關索引檢視表的詳細資訊,請參閱「備註」一節。從SQL Server 2016 (13.x) 開始,此物件可以是與叢集資料行存放區索引一併儲存...
The view doesn't have to be explicitly referenced in the query for the query optimizer to use it. Databases on primary replicas in Azure SQL Database automatically generate database advisor performance recommendations for indexes. You can optionally enable automatic index tuning. Query Store he...
An index is an on-disk structure associated with a table or view that speeds retrieval of rows from the table or view. An index contains keys built from one or more columns in the table or view. These keys are stored in a structure (B-tree) that enables SQL Server to find the row ...
For more information, see CREATE INDEX (Transact-SQL). Indexed view To create an indexed view, a unique clustered index is defined on one or more view columns. The view is executed and the result set is stored in the leaf level of the index in the same way table data is stored in a...
ApplySqlTransform applyToDataSource(CollectionBaseView, List<Transform>, String, String, String, long, String, User, String, Workflow) - Static method in class com.endeca.portal.data.transform.TransformServiceUtil This method will call DP's invokeApplyTransformToDataSource() API to kick off a ...