61 lines
1.9 KiB
Markdown
61 lines
1.9 KiB
Markdown
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---
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layout: global
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title: USE Database
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displayTitle: USE Database
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license: |
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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---
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### Description
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`USE` statement is used to set the current database. After the current database is set,
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the unqualified database artifacts such as tables, functions and views that are
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referenced by SQLs are resolved from the current database.
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The default database name is 'default'.
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### Syntax
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{% highlight sql %}
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USE database_name
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{% endhighlight %}
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### Parameter
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<dl>
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<dt><code><em>database_name</em></code></dt>
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<dd>
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Name of the database will be used. If the database does not exist, an exception will be thrown.
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</dd>
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</dl>
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### Example
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{% highlight sql %}
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-- Use the 'userdb' which exists.
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USE userdb;
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+---------+--+
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| Result |
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+---------+--+
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+---------+--+
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-- Use the 'userdb1' which doesn't exist
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USE userdb1;
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Error: org.apache.spark.sql.catalyst.analysis.NoSuchDatabaseException: Database 'userdb1' not found;(state=,code=0)
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{% endhighlight %}
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### Related statements.
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- [CREATE DATABASE](sql-ref-syntax-ddl-create-database.html)
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- [DROP DATABASE](sql-ref-syntax-ddl-drop-database.html)
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- [CREATE TABLE ](sql-ref-syntax-ddl-create-table.html)
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