You can delete an existing index in a table with the DROP INDEX statement. 你可以将现有的索引通过DROP INDEX语句进行取消操作。 Syntax for Microsoft SQLJet (and Microsoft Access): 在Microsoft SQLJet (和 Microsoft Access)中的语法是这样的: DROP INDEX index_name ON table_name Syntax for MS SQL S...
DROP INDEX index_name:表示删除名称为 index_name 的索引。 DROP FOREIGN KEY fk_symbol:表示删除外键。 注意:如果删除的列是索引的组成部分,那么在删除该列时,也会将该列从索引中删除;如果组成索引的所有列都被删除,那么整个索引将被删除。 删除索引 【实例 1】删除表 tb_stu_info 中的索引,输入的 SQL 语...
syntaxsql העתק DROP INDEX index_name ON [ WITH ( <drop_index_option> [ ,...n ] ) ] ::= { database_name.schema_name.table_or_view_name | schema_name.table_or_view_name | table_or_view_name } <drop_index_option> ::= { MAXDOP = max_degree_of_parallelism | ...
Applies to: SQL Server 2008 (10.0.x) and later versions. SQL Database supports"default"as the filegroup name. Specifies a location to move the data rows that currently are in the leaf level of the clustered index. The data is moved to the new location in the form of a heap. You can...
DROP INDEX command is used to delete an index in a table. MS Access:DROP INDEX index_name ON table_name; SQL Server:DROP INDEX table_name.index_name; DB2/Oracle:DROP INDEX index_name; MySQL:ALTER TABLE table_nameDROP INDEX index_name; ...
U-SQL currently does not provide aDROP INDEXstatement because the only existing indexes are currently clustered indexes that are required for a table to contain data. In order to drop an index, onedrops the tableinstead. See Also CREATE INDEX (U-SQL) ...
在 3.22 或以后的版本中,DROP INDEX 被映射到一个 ALTER TABLE 语句来移除索引。查看章节 6.5.4 ALTER TABLE 句法。 本文参与 腾讯云自媒体同步曝光计划,分享自作者个人站点/博客。 原始发表:2017-04-05 ,如有侵权请联系 cloudcommunity@tencent.com 删除 前往查看 数据库 云数据库 SQL Server...
SQL> drop index "SYS_AI_600vgjmtqsgv3"; drop index "SYS_AI_600vgjmtqsgv3" * ERROR at line 1: ORA-65532: cannot alter or drop automatically created indexes Although as discussed in my last post, you can now drop Automatic Indexes by using DBMS_AUTO_INDEX.DROP_AUTO_INDEXES. You can ...
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DROP INDEX TheDROP INDEXcommand is used to delete an index in a table. MS Access: DROPINDEXindex_nameONtable_name; SQL Server: DROPINDEXtable_name.index_name; DB2/Oracle: DROPINDEXindex_name; MySQL: ALTERTABLEtable_name DROPINDEXindex_name; ...