case_when-case_when文档介绍内容-阿里云

日志分析

SQL执行失败率您可以使用如下命令查询SQL执行的失败率：|SELECT sum(case when fail=1 then 1 else 0 end)*1.0/count(1)as fail_ratio 查询结果如下图所示：说明若您的业务对SQL错误率敏感，您可以在此查询结果的基础上，单击页面右上角...

日志分析

SQL执行失败率您可以使用以下命令查询SQL执行的失败率：|SELECT sum(case when fail=1 then 1 else 0 end)*1.0/count(1)as fail_ratio 查询结果如下图所示：如果您的业务对SQL错误率敏感，可以在此查询结果的基础上，定制报警信息。...

SELECT CASE WHEN CAST(SUBSTR(behavior_time,12)AS BIGINT)>=0 AND CAST(SUBSTR(behavior_time,12)AS BIGINT)点-03点' WHEN CAST(SUBSTR(behavior_time,12)AS BIGINT)>=3 AND CAST(SUBSTR(behavior_time,12)AS BIGINT)点-06点' WHEN CAST...

日志备份时报：The transaction log for database xx ...

size*1.0/128 AS FileSizeInMB,CASE max_size WHEN 0 THEN 'Autogrowth is off.' WHEN-1 THEN 'Autogrowth is on.' ELSE 'Log file grows to a maximum size of 2 TB.' END,growth AS 'GrowthValue','GrowthIncrement'=CASE WHEN growth=0 ...

SQL性能问题

原始写法 COUNT(distinct visitor_id)as UV1,COUNT(distinct case when is_wireless='y' then visitor_id else null end)as UV2 优化写法 COUNT(distinct visitor_id)as UV1,COUNT(distinct visitor_id)filter(where is_wireless='y')as UV...

数据类型转换

CASE WHEN作用下的隐式转换 CASE WHEN的详情介绍请参见 CASE WHEN表达式。它的隐式转换规则，如下：如果返回类型只有BIGINT、DOUBLE，统一转换为DOUBLE。如果返回类型中有STRING类型，统一转换为STRING，如果不能转换（如BOOLEAN类型）则报...

占位符

字段表达式示例：case when '$val{指标}'='订单金额' then[订单金额]when '$val{指标}'='利润金额' then[利润金额]when '$val{指标}'='单价' then[单价]when '$val{指标}'='运输成本' then[运输成本]else 0 end 说明文本类型占位符请用...

使用集群API Server审计功能

ip_to_city(ip)as"市",ip_to_provider(ip)as"运营商"from(select CASE WHEN json_array_length(sourceIPs)=1 then json_format(json_array_get(sourceIPs,0))ELSE sourceIPs END as ip,count(1)as total,sum(CASE WHEN"responseStatus.code...

使用集群API Server审计功能

ip_to_city(ip)as"市",ip_to_provider(ip)as"运营商"from(select CASE WHEN json_array_length(sourceIPs)=1 then json_format(json_array_get(sourceIPs,0))ELSE sourceIPs END as ip,count(1)as total,sum(CASE WHEN"responseStatus.code...

电子表格常见问题

新建一个计算字段，通过CASE WHEN判断需要计数的字段是否为空，并赋值为1。制作电子表格时，选择此新建的计算字段和包含有多个值的字段。您也可以通过自定义SQL来计算各个值的重复次数。电子表格支持数据集雪花模型关联吗？支持。电子表格...

Profile性能诊断及优化案例

select i_item_desc,w_warehouse_name,d1.d_week_seq,sum(case when p_promo_sk is null then 1 else 0 end)no_promo,sum(case when p_promo_sk is not null then 1 else 0 end)promo,count(*)total_cnt from inventory join catalog_sales...

排查公网NAT网关中高流量ECS实例

输入以下SQL语句，筛选ECS实例去往所有公网IP的流量图表：srcaddr:10.0.0.*and action:ACCEPT|select date_format(from_unixtime(_time_-_time_%60),'%H:%i:%S')as time,srcaddr,sum(bytes*8/(case WHEN"end"-start=0 THEN 1 else"end"-...

排查公网NAT网关中高流量ECS实例

输入以下SQL语句，筛选ECS实例去往所有公网IP的流量图表：srcaddr:10.0.0.*and action:ACCEPT|select date_format(from_unixtime(_time_-_time_%60),'%H:%i:%S')as time,srcaddr,sum(bytes*8/(case WHEN"end"-start=0 THEN 1 else"end"-...

DescribeDiagnosisSQLInfo-查询诊断SQL信息

{"DiagnosisSQLInfo":{"hasSharedStage":false,"resourceGroup":"user_default","cost":274,"queuedTime":0,"outputDataSize":9,"scheduled":true,"query":"/*+display=tpch_q14*/SELECT 100.00*SUM(CASE WHEN p_type LIKE 'PROMO%' THEN l...

MaxCompute SQL示例解析

SELECT deptno,COUNT(empno)AS cnt,ROUND(SUM(CASE WHEN job='CLERK' THEN 1 ELSE 0 END)/COUNT(empno),2)AS rate FROM `EMP` GROUP BY deptno;注意事项使用GROUP BY时，SELECT部分必须是分组项或聚合函数。ORDER BY后面必须加LIMIT N。...

操作审计

key_id,sum(case when"event.errorCode"is NULL or"event.errorCode"='' then 0 else 1 end)as fail_cnt group by account_id,access_key_id limit 10000 有数据匹配，fail_cnt>{{threshold}} 标签自定义：account_id，access_key_id 标题...

TPC-H测试集

SQL12 select l_shipmode,sum(case when o_orderpriority='1-URGENT' or o_orderpriority='2-HIGH' then 1 else 0 end)as high_line_count,sum(case when o_orderpriority<>'1-URGENT' and o_orderpriority<>'2-HIGH' then 1 else 0 end)as...

数据集信息和示例查询

Q12 select l_shipmode,sum(case when o_orderpriority='1-URGENT' or o_orderpriority='2-HIGH' then 1 else 0 end)as high_line_count,sum(case when o_orderpriority<>'1-URGENT' and o_orderpriority<>'2-HIGH' then 1 else 0 end)as ...

查询数据

Q12 select l_shipmode,sum(case when o_orderpriority='1-URGENT' or o_orderpriority='2-HIGH' then 1 else 0 end)as high_line_count,sum(case when o_orderpriority<>'1-URGENT' and o_orderpriority<>'2-HIGH' then 1 else 0 end)as ...

Quick BI如何根据排名大小给数据分组

如果您用的数据库支持开窗函数，以MaxCompute数据库为例，可以参考如下SQL创建数据集：select city,order_num,case when rank_num<=10 then 'top1-10'when rank_num>10 and rank_num<=20 then 'top11-20'when rank_num>20 and rank_num以上' ...

云数据库RDS SQL Server版查看锁信息

select str(request_session_id,4,0)as spid,convert(varchar(20),db_name(resource_database_id))as DB_Name,case when resource_database_id=db_id()and resource_type='OBJECT' then convert(char(20),object_name(resource_Associated_...

基于GitHub公开事件数据集的离线实时一体化实践

to_date(GET_JSON_OBJECT(col,'$.created_at'),'yyyy-mm-ddThh:mi:ssZ')AS created_at,GET_JSON_OBJECT(col,'$.payload.action')AS action,case WHEN GET_JSON_OBJECT(col,'$.type')="PullRequestEvent"THEN CAST(GET_JSON_OBJECT(col,'$....

基于GitHub公开事件数据集的离线实时一体化实践

to_date(GET_JSON_OBJECT(col,'$.created_at'),'yyyy-mm-ddThh:mi:ssZ')AS created_at,GET_JSON_OBJECT(col,'$.payload.action')AS action,case WHEN GET_JSON_OBJECT(col,'$.type')="PullRequestEvent"THEN CAST(GET_JSON_OBJECT(col,'$....

PyODPS的列运算

CREATE TABLE tmp_pyodps_d1fd70b4_2ad8_4dc9_838e_f566f7f5841e LIFECYCLE 1 AS SELECT CASE WHEN t1.`sepallength`=4.9 THEN 'eq4.9' WHEN t1.`sepallength`=5.0 THEN 'eq5.0' ELSE 'noeq' END AS `equalness` FROM DQC_0221_dev.`pyodps...

条件运算函数

select*from hello_mysql_vpc_rds.person+-+-+-+|id|name|age|+-+-+-+|1|james|10|2|bond|20|3|jack|30|4|lucy|40|+-+-+-+select*,case when age=10 then(age+10)when name='bond' then(age+20)else(age+30)end from hello_mysql_vpc_rds....

ALIYUN:SLS:Alert

1)ELSE 'kubernetes-admin' END as"操作账号",CASE WHEN json_array_length(sourceIPs)=1 then json_format(json_array_get(sourceIPs,0))ELSE sourceIPs END as"源地址"order by"操作时间"TimeSpanType:Custom Dashboard:audit-cf5362d1f...

高性能Flink SQL优化技巧

原始写法 COUNT(distinct visitor_id)as UV1,COUNT(distinct case when is_wireless='y' then visitor_id else null end)as UV2 优化写法 COUNT(distinct visitor_id)as UV1,COUNT(distinct visitor_id)filter(where is_wireless='y')as UV...

加工数据

pc' ELSE 'unknown' END AS device,CASE WHEN lower(agent)RLIKE '(bot|spider|crawler|slurp)' THEN 'crawler' WHEN lower(agent)RLIKE 'feed' OR regexp_extract(request,'^[^]+(.*)[^]+$')RLIKE 'feed' THEN 'feed' WHEN lower(agent)...

物流快递

SQL语句示例如下：select sum(case when t.op_1_timestamp>=20171128000000 and t.op_1_timestamp((t.op_2_timestamp is null or t.op_2_timestamp>20171128235900 or t.op_2_timestamp)and(t.op_3_timestamp is null or t.op_3_timestamp>...

雾霾天气预测

select time,hour,(case when pm2>200 then 1 else 0 end),pm10,so2,co,no2 from${t1};通过归一化组件，去除量纲，即将不同指标污染物的单位统一。② 统计分析：通过直方图组件以可视化的方式查看每种污染物的分布情况。以PM2.5为例，...

内建函数常见问题

解决措施您需要使用 case when 表达式或 coalesce 命令，请参见 CASE WHEN表达式或 COALESCE。如何将符合某条件的字段都拼到一个JSON中？MaxCompute SQL通过过滤条件，例如 like 等，查询得到满足指定条件的数据，然后将这些数据通过 ...

统计MaxCompute TOPN费用账号及耗时作业

insert into table<project_name>.time_topn partition(ds='${datetime1}')select inst_id,cost_time,case when a.task_owner='<user_id>' or a.task_owner='<user_id>' or a.task_owner='<user_id>' then b.user_name else a.task_owner ...

高性能版Spark全密态计算引擎性能测试报告

SELECT l_shipmode,sum(CASE WHEN o_orderpriority='1-URGENT' OR o_orderpriority='2-HIGH' THEN 1 ELSE 0 END)AS high_line_count,sum(CASE WHEN o_orderpriority<>'1-URGENT' AND o_orderpriority<>'2-HIGH' THEN 1 ELSE 0 END)AS low_...

控制结构

PL/SQL有三种形式的 IF：IF.THEN.END IF IF.THEN.ELSE.END IF IF.THEN.ELSIF.THEN.ELSE.END IF 以及两种形式的 CASE：CASE.WHEN.THEN.ELSE.END CASE CASE WHEN.THEN.ELSE.END CASE IF-THEN IF boolean-expression THEN statements END IF;...

配置服务集成

规则集：支持类似 CASE WHEN 语句的条件判断规则。脚本：支持加入 Java 代码作为变量的处理。模型：在“模型部署”中部署成功的模型，支持在此处引用。分叉：支持类似 IF ELSE 语句的条件判断规则。步骤三：验证服务完成服务的流程编排后...

电子商务

SELECT case when cus.age<= 30 then '<20'when cus.age>20 and cus.age<= 30 then '20-30'when cus.age>30 and cus.age<= 40 then '30-40' else '>40' end as age_range,COUNT(distinct cus.customer_id),SUM(total_price)FROM t_fact_customers cus ...

简介

CASE WHEN length(sql)>200 THEN concat(substr(sql,1,200),'.')ELSE trim(lpad(sql,200,' '))end as"样例SQL"FROM(SELECT sql_code,count(1)as execute_times,sum(response_time)as total_time,avg(response_time)as avg_time,avg(affect_...

简介

例如执行以下查询：SELECT sql_code as"SQL模板ID",round(total_time*1.0/sum(total_time)over()*100,2)as"总体耗时比例(%)",execute_times as"执行次数",round(avg_time)as"平均执行时间",round(avg_rows)as"平均影响行数",CASE WHEN ...

行转列及列转行最佳实践

name|chinese|mathematics|physics|+-+-+-+-+|张三|74|83|93|李四|74|84|94|张三|74|83|93|李四|74|84|94|+-+-+-+-+行转列示例您可以通过如下两种方法实现行转列：方法一：使用 case when 表达式，灵活提取各科目（subject）的值作为单独...

大数据AI公共数据集分析

SELECT CAST(SUBSTR(behavior_time,12)AS BIGINT)AS 时间段,CASE WHEN behavior_type='1' THEN '商品页浏览' WHEN behavior_type='3' THEN '加入购物车' WHEN behavior_type='4' THEN '购买成功' ELSE behavior_type END AS 用户操作,COUNT...

case_when

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