Cassandra命令行CLI的基本使用

启动cassandra-cli服务之后,可以进行CQL的使用。

1. 创建keyspace 可以理解成关系数据库的database

[default@testkeyspace] create keyspace test_keyspace;
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2. 创建列column family，可以理解为table

下面创建了一个列族User，并以UTF8的方式进行排序

[default@testkeyspace] use test_keyspace;
Authenticated to keyspace: test_keyspace
[default@test_keyspace] create column family User with comparator = UTF8Type;
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3. 插入记录

下面插入两条记录,分别是地址和电话号码

[default@test_keyspace] set User[utf8('zhangsan')][utf8('address')]=utf8('beijing');
Value inserted.
Elapsed time: 4.44 msec(s).
[default@test_keyspace] set User[utf8('zhangsan')][utf8('phone')]=utf8('');
Value inserted.
Elapsed time: 3.64 msec(s).

4. 查询记录

[default@test_keyspace] get User[utf8('zhangsan')];
=> (name=address, value=beijing, timestamp=)
=> (name=phone, value=, timestamp=)
Returned  results.
Elapsed time: 6.24 msec(s).

5. 创建超级列

[default@test_keyspace] create column family supertest with comparator = UTF8Type and column_type = Super;
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6.向超级列插入数据

下面向刚刚创建的supertest超级列插入数据

[default@test_keyspace] set supertest[utf8('zhangsan')][utf8('address')][utf8('family')]=utf8('beijing');
Value inserted.
Elapsed time: 4.3 msec(s).
[default@test_keyspace] set supertest[utf8('zhangsan')][utf8('address')][utf8('company')]=utf8('shanghai');
Value inserted.
Elapsed time: 4.07 msec(s).

7. 查询超级列的数据

下面supertest超级列刚刚插入的数据

[default@test_keyspace] get supertest[utf8('zhangsan')];
=> (super_column=address,
     (name=636f6d70616e79, value=shanghai, timestamp=)
     (name=66616d696c79, value=beijing, timestamp=))
Returned  results.
Elapsed time: 8.36 msec(s).

8. 删除列族:

下面删除刚刚创建的超级列supertest

[default@test_keyspace] drop column family supertest;
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