blocks|key|1058250|text|您可以使用rm+-rf删除整个图形目录，因为Neo4j不会存储该目录以外的任何内容：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1058251|rm+-rf+data/*|code-block|syntax|javascript|1058252|当然，您也可以遍历所有节点并删除它们的关系和节点本身，但这对于测试来说可能代价太高了……|1058253|entityMap^0|5|6|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

You can just remove the entire graph directory with <code>rm -rf</code>, because Neo4j is not storing anything outside that:

<pre><code>rm -rf data/*
</code></pre>

Also, you can of course iterate through all nodes and delete their relationships and the nodes themselves, but that might be too costly just for testing ...

blocks|key|1058369|text|更简单的删除所有节点和关系的命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1058370|MATCH+(n)
OPTIONAL+MATCH+(n)-[r]-()
DELETE+n,r|code-block|syntax|javascript|1058371|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

even more simple command to delete all nodes and relationships:

<pre><code>MATCH (n)
OPTIONAL MATCH (n)-[r]-()
DELETE n,r
</code></pre>

blocks|key|844081|text|从Neo4j+2.3开始，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|844082|我们可以删除all+nodes+with+relationships|offset|length|844083|MATCH+(n)
DETACH+DELETE+n|code-block|syntax|javascript|844084|目前没有任何选项可以在Noe4j中创建多个数据库。您需要对Neo4j数据进行多个存储。参见reference。|844085|entityMap|0|LINK|mutability|MUTABLE|url|http://neo4j.com/docs/stable/query-delete.html#delete-delete-all-nodes-and-relationships|1|https://stackoverflow.com/a/25660146/1045444^0|0|6|S|0|0|0|19|9|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@$D|13|E|14|1|15]]|A|$]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]|U|$5|P|Q|R|A|$S|V]]]]

<h1>From Neo4j 2.3,</h1>
We can delete <a href="http://neo4j.com/docs/stable/query-delete.html#delete-delete-all-nodes-and-relationships" rel="noreferrer">all nodes with relationships</a>,
<pre><code>MATCH (n)
DETACH DELETE n
</code></pre>
Currently there is no any option to create multiple databases in Noe4j. You need to make multiple stores of Neo4j data. See <a href="https://stackoverflow.com/a/25660146/1045444">reference</a>.

blocks|key|1058586|text|在Neo4j中创建新数据库|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1058587|在启动neo4j社区之前，单击浏览选项|1058588|​|1058589|📷|atomic|offset|length|1058590|1058591|并选择不同的目录|1058592|1058593|1058594|1058595|1058596|1058597|1058598|然后单击start按钮。|1058599|1058600|1058601|1058602|在该目录上创建的新数据库|1058603|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/c69a603a76a81a5fe3a96ed2aa7f2f91.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/f1cdebdf060f79d9e36aed4fc9752374.png|2|https://ask.qcloudimg.com/http-save/yehe-900000/8bb0d1a84c0ddb4fdb83a0e33eee3d96.png|3|https://ask.qcloudimg.com/http-save/yehe-900000/ba634fd9cbe84ddaee4b62a051a8cee0.png^0|0|0|0|0|1|0|0|0|0|0|0|1|1|0|0|0|0|1|2|0|0|0|0|0|1|3|0|0|0^^$0|@$1|2|3|4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1G|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1H|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|1I|8|@]|9|@$I|1J|J|1K|1|1L]]|A|$]]|$1|K|3|E|5|6|7|1M|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1N|8|@]|9|@]|A|$]]|$1|N|3|E|5|6|7|1O|8|@]|9|@]|A|$]]|$1|O|3|G|5|H|7|1P|8|@]|9|@$I|1Q|J|1R|1|1S]]|A|$]]|$1|P|3|E|5|6|7|1T|8|@]|9|@]|A|$]]|$1|Q|3|E|5|6|7|1U|8|@]|9|@]|A|$]]|$1|R|3|G|5|H|7|1V|8|@]|9|@$I|1W|J|1X|1|1Y]]|A|$]]|$1|S|3|E|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|20|8|@]|9|@]|A|$]]|$1|V|3|E|5|6|7|21|8|@]|9|@]|A|$]]|$1|W|3|G|5|H|7|22|8|@]|9|@$I|23|J|24|1|25]]|A|$]]|$1|X|3|E|5|6|7|26|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|27|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|28|8|@]|9|@]|A|$]]]|11|$12|$5|13|14|15|A|$16|17|18|-4]]|19|$5|13|14|15|A|$16|1A|18|-4]]|1B|$5|13|14|15|A|$16|1C|18|-4]]|1D|$5|13|14|15|A|$16|1E|18|-4]]]]

Creating new Database in Neo4j

Before Starting neo4j community click the browse option 

<img src="https://i.stack.imgur.com/2em6y.png" alt="enter image description here">

and choose a different directory 

<img src="https://i.stack.imgur.com/UNIWx.png" alt="enter image description here">

<img src="https://i.stack.imgur.com/cURg6.png" alt="enter image description here">

and click start button.

<img src="https://i.stack.imgur.com/tPfz4.png" alt="enter image description here">

New database created on that direcory

blocks|key|1058614|text|快速和肮脏的方式，工作良好：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1058615|bin/neo4j+stop
rm+-rf+data/
mkdir+data
bin/neo4j+start|code-block|syntax|javascript|1058616|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

quick and dirty way that works fine:

<pre><code>bin/neo4j stop
rm -rf data/
mkdir data
bin/neo4j start
</code></pre>

blocks|key|843742|text|对于任何需要一个干净的图形来运行测试套件的人来说-+https://github.com/jexp/neo4j-clean-remote-db-addon是一个很棒的扩展，它允许通过REST调用清除数据库。显然，不要在生产中使用它！|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|843743|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/jexp/neo4j-clean-remote-db-addon^0|Q|1F|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

For anyone else who needs a clean graph to run a test suite - <a href="https://github.com/jexp/neo4j-clean-remote-db-addon">https://github.com/jexp/neo4j-clean-remote-db-addon</a> is a great extension to allow clearing the db through a REST call. Obviously, though, don't use it in production!

blocks|key|1058392|text|在Neo4j+2.0.0中？不再受支持。请改用可选匹配：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1058393|START+n=node(*)
OPTIONAL+MATCH+(n)-[r]-()
delete+n,r;|code-block|syntax|javascript|1058394|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In Neo4j 2.0.0 the ? is no longer supported. Use OPTIONAL MATCH instead: 

<pre><code>START n=node(*)
OPTIONAL MATCH (n)-[r]-()
delete n,r;
</code></pre>

blocks|key|843775|text|在2.0.0+-M6中，您可以执行以下Cypher脚本来删除所有节点和关系：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|843776|start+n=node(*)
match+(n)-[r?]-()
delete+n,r|code-block|syntax|javascript|843777|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In 2.0.0 -M6 You can execute the following Cypher script to delete all nodes and relations:

<pre><code>start n=node(*)
match (n)-[r?]-()
delete n,r
</code></pre>

blocks|key|844070|text|你可以删除你的数据文件，如果你想这样做，我建议你只删除你的graph.db，例如。否则你会弄乱你的身份验证信息。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|844071|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You can delete your data files and if you want to go through this way, I would recommend delete just your graph.db, for example. Otherwise your are going to mess your authentication info.

Is it possible to create/delete different databases in the graph database <a href="http://neo4j.org/" rel="noreferrer">Neo4j</a> like in MySQL? Or, at least, how to delete all nodes and relationships of an existing graph to get a clean setup for tests, e.g., using shell commands similar to <code>rmrel</code> or <code>rm</code>?

How to delete/create databases in Neo4j?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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是否可以像在MySQL中那样在图形数据库中创建/删除不同的数据库？或者，至少，如何删除现有图的所有节点和关系以获得干净的测试设置，例如，使用类似于rmrel或rm的外壳命令

问如何在Neo4j中删除/创建数据库？
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