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The DROP INDEX statement allows you to drop an existing index. The syntax of the DROP INDEX statement is as simple as follows: DROP INDEX [schema_name.]index_name; Code language: JavaScript (javascript) In this syntax: First, specify an optional schema name to which the index belongs.
6 Φεβ 2014 · How do you drop an index only if it exists? It seems simple but I did found anything on the net. The idea is to drop it only if it exists, because if not, I will have an error and my process stops. I found this to find if the index exists: select index_name. from user_indexes. where table_name = 'myTable' and index_name='myIndexName'
Use the DROP INDEX statement to remove an index or domain index from the database. When you drop an index, Oracle Database invalidates all objects that depend on the underlying table, including views, packages, package bodies, functions, and procedures.
Use the DROP INDEX statement to remove an index or domain index from the database. When you drop a global partitioned index, a range-partitioned index, or a hash-partitioned index, all the index partitions are also dropped.
The 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_name.
This Oracle tutorial explains how to create, rename and drop indexes in Oracle with syntax and examples. An index is a performance-tuning method of allowing faster retrieval of records.
You can drop tables using the SQL DROP command. Dropping a table will remove all of the rows and drop sub-objects including indexes and triggers. The following DROP statements will drop the departments and employees tables.
