In this tutorial, you will learn how to use the Oracle DROP INDEX statement to remove an index. Introduction to Oracle DROP INDEX statement The DROP INDEX statement allows you to drop an existing index. Here’s
ルーチンの詳細は、『Oracle Databaseデータ・カートリッジ開発者ガイド』を参照してください。 索引の作成および変更の詳細は、「CREATE INDEX」および「ALTER INDEX」を参照してください。 ドメイン索引の詳細は、「CREATE INDEX」の「domain_index_clause」を参照してください。 統計タイプの関連...
One more parameter used in the CREATE INDEX statement is COMPUTE STATISTICS. It is an optional parameter telling Oracle to collect the statistics during index creation. Further, this stats data would serve when choosing the “plan of execution” of SQL statements. However, since Oracle 10, the ...
In addition, when you drop a domain index: Oracle Database invokes the appropriate routine. If any statistics are associated with the domain index, then Oracle Database disassociates the statistics types with theFORCEclause and removes the user-defined statistics collected with the statistics type....
在Oracle数据库中,DROP INDEX 语句本身并不支持 IF EXISTS 子句。这意味着,如果尝试删除一个不存在的索引,Oracle将会抛出一个错误。为了实现类似 DROP INDEX IF EXISTS 的功能,我们需要使用PL/SQL代码来检查索引是否存在,并相应地执行删除操作。以下是实现这一功能的步骤和相应的代码片段: 检查索引是否存在: 使用数据...
51CTO博客已为您找到关于oracle drop index的相关内容,包含IT学习相关文档代码介绍、相关教程视频课程,以及oracle drop index问答内容。更多oracle drop index相关解答可以来51CTO博客参与分享和学习,帮助广大IT技术人实现成长和进步。
Index altered. SQL> alter index "SYS_AI_600vgjmtqsgv3" shrink space; Index altered. Interestingly, if Oracle considers an Automatic Index but decides it’s not efficient enough to be created, the Automatic Indexing process can leave a new Automatic Index in UNUSABLE / INVISIBLE state (as pre...
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. ...
SQL> select index_name, index_type, status from user_indexes s where index_name in ('IDX_ACCTFLOW_CUSTOMTRANSTYPE', 'IDX_ACCTFLOW_CUSTCODE', 'IDX_ACCTFLOW_MAPPING', 'IDX_ACCTFLOW_TYPECODEDATE', 'PK_CUSTOMACCOUNTFLOW'); 2 3 4 5 6 7 ...
DROP INDEX index_name ON table_name Syntax for MS SQL Server: MS SQL Server的语法是这样: DROP INDEX table_name.index_name Syntax for IBM DB2 and Oracle: IBM DB2和Oracle的语法为: DROP INDEX index_name Syntax for MySQL: MySql则是这样: ...