clickhouse简介

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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.git2、cd ssb-dbgen3、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.tblclickhouse-client --query "INSERT INTO part FORMAT CSV" < part.tblclickhouse-client --query "INSERT INTO supplier FORMAT CSV" < supplier.tblclickhouse-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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