# 8. SQL Reference

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Contents
Preface
SQL Reference
Datatypes
User Defined Types
XML Column Type
Identifier Case & Quoting
Wide Character Identifiers
Qualified Names
Literals, Brace Escapes
CREATE TABLE Statement
DROP TABLE Statement
CREATE INDEX Statement
DROP INDEX Statement
ALTER TABLE Statement
CREATE VIEW Statement
CREATE XML SCHEMA Statement
DROP XML SCHEMA Statement
Sequence Objects
INSERT Statement
UPDATE Statement
SELECT Statement
COMMIT WORK, ROLLBACK WORK Statement
CHECKPOINT, SHUTDOWN Statement
Stored Procedures as Views & Derived Tables
GRANT, REVOKE Statement
SET Statement
Best Effort Union
Standard and User-Defined Aggregate Functions
Virtuoso SQL Optimization
SQL Inverse Functions
SQL Grammar
Bitmap Indices

## 8.11. DROP INDEX Statement

    drop_index
    	: DROP INDEX NAME opt_table
    	;

    opt_table
    	: /* empty */
    	| q_table_name
    	;

This will drop an index, dba privileges or table ownership are required. A table's primary key which has the same name as the table can not be dropped.

Optionally, a table name can be given if the index name is not unique. The table name may be qualified.

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