Oracle DROP INDEXSummary: 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 the basic syntax of the DROP INDEX statement: DROP ...
The DROP INDEX statement is used to delete an index in a table. DROP INDEX Syntax for MS Access: DROP INDEX index_name ON table_name DROP INDEX Syntax for MS SQL Server: DROP INDEX table_name.index_name DROP INDEX Syntax for DB2/Oracle: ...
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 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...
Syntax drop_index::= Description of the illustration drop_index.eps Semantics schema Specify the schema containing the index. If you omitschema, then Oracle Database assumes the index is in your own schema. index Specify the name of the index to be dropped. When the index is dropped, all ...
Syntax drop_index_statement ::= DROP INDEX [IF EXISTS]index_nameONtable_name Semantics If an index with the given name does not exist, then the statement fails, and an error is reported. If the optional IF EXISTS clause is used in the DROP INDEX statement, and if an index with the sa...
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. Syntax: DROP INDEX [ schema. ] index [ FORCE ] ...
--SQL DROP INDEX 语句--我们可以使用 DROP INDEX 命令删除表格中的索引。--用于 Microsoft SQLJet (以及 Microsoft Access) 的语法:DROPINDEXindex_nameONtable_name--用于 MS SQL Server 的语法:DROPINDEXtable_name.index_name--用于 IBM DB2 和 Oracle 语法:DROPINDEXindex_name--用于 MySQL 的语法:ALTER...
--SQL DROP INDEX 语句 --我们可以使用 DROP INDEX 命令删除表格中的索引。 --用于 Microsoft SQLJet (以及 Microsoft Access) 的语法: DROP INDEX index_name ON table_name --用于 MS SQL Server 的语法: DROP INDEX table_name.index_name --用于 IBM DB2 和 Oracle 语法: ...
The syntax is as follows: obclient> ALTER TABLE table_name DROP KEY|INDEX index_name; where table_namespecifies the name of the table from which the index is to be dropped. KEY|INDEXindicates that you can use either theINDEXor theKEYkeyword in the statement. ...
Only theMyISAM,InnoDB, andBDBtable types support indexes on columns that can haveNULLvalues. In other cases you must declare such columnsNOT NULLor an error results. Withcol_name(length)syntax, you can specify an index that uses only a part of aCHARorVARCHARcolumn. This can make the index...