0001 ---
0002 layout: global
0003 title: DROP DATABASE
0004 displayTitle: DROP DATABASE
0005 license: |
0006 Licensed to the Apache Software Foundation (ASF) under one or more
0007 contributor license agreements. See the NOTICE file distributed with
0008 this work for additional information regarding copyright ownership.
0009 The ASF licenses this file to You under the Apache License, Version 2.0
0010 (the "License"); you may not use this file except in compliance with
0011 the License. You may obtain a copy of the License at
0012
0013 http://www.apache.org/licenses/LICENSE-2.0
0014
0015 Unless required by applicable law or agreed to in writing, software
0016 distributed under the License is distributed on an "AS IS" BASIS,
0017 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0018 See the License for the specific language governing permissions and
0019 limitations under the License.
0020 ---
0021
0022 ### Description
0023
0024 Drop a database and delete the directory associated with the database from the file system. An
0025 exception will be thrown if the database does not exist in the system.
0026
0027 ### Syntax
0028
0029 ```sql
0030 DROP { DATABASE | SCHEMA } [ IF EXISTS ] dbname [ RESTRICT | CASCADE ]
0031 ```
0032
0033 ### Parameters
0034
0035 * **DATABASE `|` SCHEMA**
0036
0037 `DATABASE` and `SCHEMA` mean the same thing, either of them can be used.
0038
0039 * **IF EXISTS**
0040
0041 If specified, no exception is thrown when the database does not exist.
0042
0043 * **RESTRICT**
0044
0045 If specified, will restrict dropping a non-empty database and is enabled by default.
0046
0047 * **CASCADE**
0048
0049 If specified, will drop all the associated tables and functions.
0050
0051 ### Examples
0052
0053 ```sql
0054 -- Create `inventory_db` Database
0055 CREATE DATABASE inventory_db COMMENT 'This database is used to maintain Inventory';
0056
0057 -- Drop the database and it's tables
0058 DROP DATABASE inventory_db CASCADE;
0059
0060 -- Drop the database using IF EXISTS
0061 DROP DATABASE IF EXISTS inventory_db CASCADE;
0062 ```
0063
0064 ### Related Statements
0065
0066 * [CREATE DATABASE](sql-ref-syntax-ddl-create-database.html)
0067 * [DESCRIBE DATABASE](sql-ref-syntax-aux-describe-database.html)
0068 * [SHOW DATABASES](sql-ref-syntax-aux-show-databases.html)
