快速使用StarRocks进行建表和查询-开源大数据平台 E-MapReduce-阿里云

本文主要通过示例为您介绍，如何快速使用E-MapReduce上的StarRocks集群进行基本的建表和查询操作。

前提条件

已创建StarRocks集群，详情请参见创建StarRocks集群。

使用示例

使用SSH方式登录StarRocks集群的Master节点，详情请参见登录集群。
执行以下命令，连接StarRocks集群。
```
mysql -h127.0.0.1  -P 9030 -uroot
```
执行以下命令，创建数据库并选择数据库。
```
CREATE DATABASE IF NOT EXISTS load_test;
USE load_test;
```

执行以下命令，创建表。

 CREATE TABLE insert_wiki_edit
(
    event_time DATETIME,
    channel VARCHAR(32) DEFAULT '',
    user VARCHAR(128) DEFAULT '',
    is_anonymous TINYINT DEFAULT '0',
    is_minor TINYINT DEFAULT '0',
    is_new TINYINT DEFAULT '0',
    is_robot TINYINT DEFAULT '0',
    is_unpatrolled TINYINT DEFAULT '0',
    delta INT SUM DEFAULT '0',
    added INT SUM DEFAULT '0',
    deleted INT SUM DEFAULT '0'
)
AGGREGATE KEY(event_time, channel, user, is_anonymous, is_minor, is_new, is_robot, is_unpatrolled)
PARTITION BY RANGE(event_time)
(
    PARTITION p06 VALUES LESS THAN ('2015-09-12 06:00:00'),
    PARTITION p12 VALUES LESS THAN ('2015-09-12 12:00:00'),
    PARTITION p18 VALUES LESS THAN ('2015-09-12 18:00:00'),
    PARTITION p24 VALUES LESS THAN ('2015-09-13 00:00:00')
)
DISTRIBUTED BY HASH(user) BUCKETS 10
PROPERTIES("replication_num" = "1");

执行以下命令，导入测试数据。

INSERT INTO insert_wiki_edit VALUES("2015-09-12 00:00:00","#en.wikipedia","GELongstreet",0,0,0,0,0,36,36,0),("2015-09-12 00:00:00","#ca.wikipedia","PereBot",0,1,0,1,0,17,17,0);

执行以下命令，查询数据。

select * from insert_wiki_edit;

返回信息如下所示。

+---------------------+---------------+--------------+--------------+----------+--------+----------+----------------+-------+-------+---------+
| event_time          | channel       | user         | is_anonymous | is_minor | is_new | is_robot | is_unpatrolled | delta | added | deleted |
+---------------------+---------------+--------------+--------------+----------+--------+----------+----------------+-------+-------+---------+
| 2015-09-12 00:00:00 | #en.wikipedia | GELongstreet |            0 |        0 |      0 |        0 |              0 |    36 |    36 |       0 |
| 2015-09-12 00:00:00 | #ca.wikipedia | PereBot      |            0 |        1 |      0 |        1 |              0 |    17 |    17 |       0 |
+---------------------+---------------+--------------+--------------+----------+--------+----------+----------------+-------+-------+---------+
2 rows in set (0.16 sec)