0001 ---
0002 layout: global
0003 title: USE Database
0004 displayTitle: USE 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 `USE` statement is used to set the current database. After the current database is set,
0025 the unqualified database artifacts such as tables, functions and views that are
0026 referenced by SQLs are resolved from the current database.
0027 The default database name is 'default'.
0028
0029 ### Syntax
0030
0031 ```sql
0032 USE database_name
0033 ```
0034
0035 ### Parameter
0036
0037 * **database_name**
0038
0039 Name of the database will be used. If the database does not exist, an exception will be thrown.
0040
0041 ### Examples
0042
0043 ```sql
0044 -- Use the 'userdb' which exists.
0045 USE userdb;
0046
0047 -- Use the 'userdb1' which doesn't exist
0048 USE userdb1;
0049 Error: org.apache.spark.sql.catalyst.analysis.NoSuchDatabaseException: Database 'userdb1' not found;
0050 (state=,code=0)
0051 ```
0052
0053 ### Related Statements
0054
0055 * [CREATE DATABASE](sql-ref-syntax-ddl-create-database.html)
0056 * [DROP DATABASE](sql-ref-syntax-ddl-drop-database.html)
0057 * [CREATE TABLE ](sql-ref-syntax-ddl-create-table.html)
