DropIndexStatement 类型公开以下成员。 属性 展开表 名称说明 DropIndexClauses 获取要删除的索引(可能带有选项)的列表。 FirstTokenIndex 获取或设置第一个标记索引。 (继承自 TSqlFragment。) FragmentLength 获取片段长度。 (继承自 TSqlFragment。) LastTokenIndex 获取或设置最后一个标记索引。 (继承自 TSqlF...
DropIndexStatement 型別會公開下列成員。方法展開資料表 名稱說明 Accept 指定之訪客的進入點。 (覆寫 TSqlFragment.Accept(TSqlFragmentVisitor)。) AcceptChildren 在具有指定之訪客的子系上呼叫 Accept。 (覆寫 TSqlStatement.AcceptChildren(TSqlFragmentVisitor)。) Equals 判斷指定的 Object 和目前的 Object ...
perform the scan and sort operations associated with dropping the clustered index, just like other queries do. You can manually configure the number of processors that are used to run theDROP INDEXstatement by specifying theMAXDOPindex option. For more information, seeConfigure Parallel Index ...
AlterServiceStatement AlterSymmetricKeyStatement AlterTableAddTableElementStatement AlterTableAlterColumnOption AlterTableAlterColumnStatement AlterTableAlterIndexStatement AlterTableAlterPartitionStatement AlterTableChangeTrackingModificationStatement AlterTableConstraintModificationStatement AlterTableDropTableElement Alt...
Examples Dropping an Index: Example This statement drops an index namedord_customer_ix_demo, which was created in"Compressing an Index: Example": DROP INDEX ord_customer_ix_demo; Previous Page Next Page
Drop Index in PostgreSQL 9.3.13 DROP INDEX -- remove an index Syntax: DROP INDEX [ CONCURRENTLY ] [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ] Drop Index in Oracle 11g In Oracle, DROP INDEX statement is used to remove an index or domain index from the database. ...
ALTER INDEX index_name ADD column_name, DROP column_name; 3.ALTER VIEW:此语句用于修改现有视图的定义,例如更改用于创建视图的 SELECT 语句。ALTER VIEW 语句的语法为: ALTER VIEW view_name AS select_statement; 请注意,ALTER 语句的确切语法可能因所使用的特定数据库管理系统 (DBMS) 而异。
The DROP INDEX statement does not apply to indexes created by defining PRIMARY KEY or UNIQUE constraints. To remove the constraint and corresponding index, useALTER TABLEwith the DROP CONSTRAINT clause. Important The syntax defined in <drop_backward_compatible_index> will be removed in a future ve...
Create unique index full_naem (last_name,first_name) on table_name 创建非唯一性次索引,且不用命名: Create index (airline_cd) on table_name 删除次索引:只有次索引可以被删除,主索引不能被删除 Drop index full_name on table_name 利用次索引名删除次索引 ...
Index_property: 索引属性。 UNIQUE索引既可以采用聚集索引结构,也可以采用非聚集索引的结构,如果不指明采用的索引结构,则SQL Server系统默认为采用非聚集索引结构。 1.42 删除索引语法: DROP INDEX table_name.index_name[,table_name.index_name] 说明:table_name: 索引所在的表名称。