ClickHouse SQL与引擎--基本使用(一)

1.查看所有的数据库

sql 复制代码
show databases;

2.创建库

sql 复制代码
CREATE DATABASE zabbix ENGINE = Ordinary;
ATTACH DATABASE ck_test ENGINE = Ordinary;

3.创建本地表

sql 复制代码
CREATE TABLE IF NOT EXISTS test01(
    id UInt64,
    name String,
    time UInt64,
    age UInt8,
    flag UInt8
)
ENGINE = MergeTree
PARTITION BY toDate(time/1000)
ORDER BY (id,name)
SETTINGS index_granularity = 8192

4.查看表结构

sql 复制代码
--查看表结构 desc dis_table;
desc  `default`.test_enum

5如何使用表引擎

sql 复制代码
--3.1 TinyLog
create table t_tinylog ( id String, name String) engine=TinyLog;

--3.2 Memory
create table t_memory(id Int16, name String) engine=Memory;
insert into t_memory values(1, 'lisi');


--3.3 MergeTree
create table t_order_mt(
    id UInt32,
    sku_id String,
    total_amount Decimal(16,2),
    create_time  Datetime
 ) engine=MergeTree
 partition by toYYYYMMDD(create_time)
 primary key (id)
 order by (id,sku_id)

 
insert into  t_order_mt
values(101,'sku_001',1000.00,'2023-08-01 12:00:00') ,
(102,'sku_002',2000.00,'2023-08-01 11:00:00'),
(102,'sku_004',2500.00,'2023-08-01 12:00:00'),
(102,'sku_002',2000.00,'2023-08-01 13:00:00')
(102,'sku_002',12000.00,'2023-08-01 13:00:00')
(102,'sku_002',600.00,'2023-08-02 12:00:00');
 
--3.3.4 数据TTL

create table t_order_mt3(
    id UInt32,
    sku_id String,
    total_amount Decimal(16,2)  TTL create_time+interval 10 SECOND,
    create_time  Datetime 
 ) engine =MergeTree
partition by toYYYYMMDD(create_time)
primary key (id)
order by (id, sku_id)

insert into  t_order_mt3
values(106,'sku_001',1000.00,'2021-01-16 10:58:30') ,
(107,'sku_002',2000.00,'2020-06-12 22:52:30'),
(110,'sku_003',600.00,'2021-01-17 12:00:00')




--3.4 ReplacingMergeTree


---建表
create table t_order_rmt(
    id UInt32,
    sku_id String,
    total_amount Decimal(16,2) ,
    create_time  Datetime 
) engine =ReplacingMergeTree(create_time)
partition by toYYYYMMDD(create_time)
primary key (id)
order by (id, sku_id);



---插入数据

insert into  t_order_rmt
values(101,'sku_001',1000.00,'2020-06-01 12:00:00') ,
(102,'sku_002',2000.00,'2020-06-01 11:00:00'),
(102,'sku_004',2500.00,'2020-06-01 12:00:00'),
(102,'sku_002',2000.00,'2020-06-01 13:00:00')
(102,'sku_002',12000.00,'2020-06-01 13:00:00')
(102,'sku_002',600.00,'2020-06-02 12:00:00')

--执行合并
optimize table t_order_rmt final;



--3.5 SummingMergeTree

---建表
create table t_order_smt(
    id UInt32,
    sku_id String,
    total_amount Decimal(16,2) ,
    create_time  Datetime 
 ) engine =SummingMergeTree(total_amount)
 partition by toYYYYMMDD(create_time)
   primary key (id)
   order by (id,sku_id )
--插入数据

insert into  t_order_smt
values(101,'sku_001',1000.00,'2020-06-01 12:00:00') ,
(102,'sku_002',2000.00,'2020-06-01 11:00:00'),
(102,'sku_004',2500.00,'2020-06-01 12:00:00'),
(102,'sku_002',2000.00,'2020-06-01 13:00:00')
(102,'sku_002',12000.00,'2020-06-01 13:00:00')
(102,'sku_002',600.00,'2020-06-02 12:00:00');

ClickHouse SQL与引擎--基本使用(一)

相关推荐
weixin_307779138 小时前
Python实现MySQL建表语句转换成Clickhouse SQL
数据库·python·sql·mysql·clickhouse
大千AI助手10 天前
硬核实战 | 3分钟Docker部署ClickHouse列存数据库
大数据·clickhouse·docker·database
Sayai11 天前
dbeaver 查询clickhouse,数据库时间差了8小时
数据库·clickhouse·oracle
weixin_3077791312 天前
Clickhouse统计指定表中各字段的空值、空字符串或零值比例
运维·数据仓库·clickhouse
weixin_3077791313 天前
Linux下GCC和C++实现统计Clickhouse数据仓库指定表中各字段的空值、空字符串或零值比例
linux·运维·c++·数据仓库·clickhouse
斯特凡今天也很帅14 天前
clickhouse常用语句汇总——持续更新中
数据库·sql·clickhouse
SelectDB技术团队15 天前
从 ClickHouse、Druid、Kylin 到 Doris:网易云音乐 PB 级实时分析平台降本增效
大数据·数据仓库·clickhouse·kylin·实时分析
risc12345620 天前
【ClickHouse】RollingBitmap
clickhouse
斯特凡今天也很帅20 天前
clickhouse如何查看操作记录,从日志来查看写入是否成功
数据库·clickhouse
袖清暮雨25 天前
ClickHouse讲解
大数据·数据库·数据仓库·clickhouse·oracle