A. CREATE TABLE B. CREATE INDEX C. CREATE VIEW D. INDEX ON 相关知识点: 试题来源: 解析 B 正确答案:B解析:SQL定义功能中,利用CREATE INDEX命令可以建立表的索引,选项A)定义一个新表,选项C)定义一个视图,选项D)可以为表建立索引,但不属于SQL语句。反馈...
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...
Multiple unique nonclustered indexes can be defined on a table. 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 ...
SQL Server、Azure SQL 数据库和Azure SQL 托管实例的语法。syntaxsql 复制 ALTER INDEX { index_name | ALL } ON { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> [ , ...n ] ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_index_option> ...
Modifies an existing table or view index (rowstore, columnstore, or XML) by disabling, rebuilding, or reorganizing the index; or by setting options on the index.
当database_name是当前数据库或database_name并且table_or_view_nametempdb以#开头时,SQL 数据库支持由三部分构成的名称格式<database_name>.[schema_name].。REBUILD [ WITH ( <rebuild_index_option> [ ,... n ] ] ]适用于:SQL Server 2012 (11.x) 及更高版本和 Azure SQL 数据库指定使用相同的列...
SQL>createviewv_testasselectempno,ename,salfromtest;Viewcreated. 2、rename表 SQL>rename testtotest1;Tablerenamed. 3、查看视图是否失效 SQL>select*fromv_test;select*fromv_test*ERROR at line1: ORA-04063:view"SCOTT.V_TEST" has errors 4、表名改回来 ...
SQL on Azure Azure Arc Resources Reference Save Add to Collections Add to plan Share via Facebookx.comLinkedInEmail Print Article 11/23/2024 10 contributors Feedback In this article Online Index Structures Online Index Activities Source Structure Activities ...
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。 ON 它将强制表对于一般的访问保持有效,并且不创建任何阻止用户使用索引和/表的锁。
Status:DuplicateImpact on me: None Category:MySQL WorkbenchSeverity:S2 (Serious) Version:8.0.23OS:Windows Assigned to:CPU Architecture:x86 Tags:INDEX,SELECT,workbench [28 Apr 2021 13:45] Kiri Stone Description:I was attempting to view a table within my database that I've viewed successfully be...