clickhouse简介 ClickHouse是一个面向列存储的数据库管理系统,可以使用SQL查询实时生成分析数据报告,主要用于OLAP(在线分析处理查询)场景。关于clickhouse原理以及基础知识在以后学习中慢
clickhouse简介
ClickHouse是一个面向列存储的数据库管理系统,可以使用SQL查询实时生成分析数据报告,主要用于OLAP(在线分析处理查询)场景。关于clickhouse原理以及基础知识在以后学习中慢慢总结。
1、Docker安装ClickHouse
docker run -d --name some-clickhouse-server \ -p 8123:8123 -p 9009:9009 -p 9091:9000 \ --ulimit nofile=262144:262144 \ -v /home/clickhouse:/var/lib/clickhouse \ yandex/clickhouse-server
2、下载SSBM工具
1、git clone https://github.com/vadimtk/ssb-dbgen.git 2、cd ssb-dbgen 3、make
3、生成数据
./dbgen -s 100 -T c ./dbgen -s 100 -T p ./dbgen -s 100 -T s ./dbgen -s 100 -T l ./dbgen -s 100 -T d
查看下数据

4、建表
CREATE TABLE default.customer
(
C_CUSTKEY UInt32,
C_NAME String,
C_ADDRESS String,
C_CITY LowCardinality(String),
C_NATION LowCardinality(String),
C_REGION LowCardinality(String),
C_PHONE String,
C_MKTSEGMENT LowCardinality(String)
)
ENGINE = MergeTree ORDER BY (C_CUSTKEY);
CREATE TABLE default.lineorder
(
LO_ORDERKEY UInt32,
LO_LINENUMBER UInt8,
LO_CUSTKEY UInt32,
LO_PARTKEY UInt32,
LO_SUPPKEY UInt32,
LO_ORDERDATE Date,
LO_ORDERPRIORITY LowCardinality(String),
LO_SHIPPRIORITY UInt8,
LO_QUANTITY UInt8,
LO_EXTENDEDPRICE UInt32,
LO_ORDTOTALPRICE UInt32,
LO_DISCOUNT UInt8,
LO_REVENUE UInt32,
LO_SUPPLYCOST UInt32,
LO_TAX UInt8,
LO_COMMITDATE Date,
LO_SHIPMODE LowCardinality(String)
)
ENGINE = MergeTree PARTITION BY toYear(LO_ORDERDATE) ORDER BY (LO_ORDERDATE, LO_ORDERKEY);
CREATE TABLE default.part
(
P_PARTKEY UInt32,
P_NAME String,
P_MFGR LowCardinality(String),
P_CATEGORY LowCardinality(String),
P_BRAND LowCardinality(String),
P_COLOR LowCardinality(String),
P_TYPE LowCardinality(String),
P_SIZE UInt8,
P_CONTAINER LowCardinality(String)
)
ENGINE = MergeTree ORDER BY P_PARTKEY;
CREATE TABLE default.supplier
(
S_SUPPKEY UInt32,
S_NAME String,
S_ADDRESS String,
S_CITY LowCardinality(String),
S_NATION LowCardinality(String),
S_REGION LowCardinality(String),
S_PHONE String
)
ENGINE = MergeTree ORDER BY S_SUPPKEY;
5、导入数据
准备工作:
先把ssb-dbgen(lineorder.tbl,customer.tbl,part.tbl,supplier.tbl)考到clickhouse-server容器里面
clickhouse-client --query "INSERT INTO customer FORMAT CSV" < customer.tbl clickhouse-client --query "INSERT INTO part FORMAT CSV" < part.tbl clickhouse-client --query "INSERT INTO supplier FORMAT CSV" < supplier.tbl clickhouse-client --query "INSERT INTO lineorder FORMAT CSV" < lineorder.tbl
注意:如果此处报错,检查clickhouse的配置(端口是否占用,是否设置用户和密码)
6、测试
官网参考:
https://clickhouse.tech/docs/zh/getting-started/example-datasets/star-schema/#star-schema-benchmark
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