在云计算中,使用case when语句覆盖/更新proc sql中的af变量值是一种灵活的数据处理技术。Case when语句是一种条件表达式,它根据给定的条件选择性地执行不同的操作。 Proc SQL是SAS语言中的一个过程,用于执行结构化查询语言(SQL)操作。在使用Proc SQL进行数据处理时,我们可以使用case when语句来覆...
proc sql; create table test as select distinct store_id, max(date) as close_date, min(date) as open_date, count(distinct case when min(date) ge '12-OCT-2016'd and max(date) le '30-NOV-2019'd) then ) as /*not sure syntax here*/ count(distinct customer_id) as ...
proc sql;selectcount(name)asn label ="人数",mean(height)asmean_hgt label ="身高均值(m)"format=8.2,std(height)asstd_hgt label ="身高标准差(m)"format=8.3fromclass;quit; ↑向右滑动查看全部代码↑ 输出结果: 如果需要对不重复的观...
proc sql; /*列出2005年交易天数不小于240天的股票*/ select stkcd,count(*) as trday from resdat.dret where '1jan2005'd<=date<='31dec2005'd group by stkcd having calculated trday>=240; /*group by+having语句*/ quit; Part 2:【多表检索(横向连接)】 china: usa: 1.内连接 proc sql; ...
proc sql;selectcount(distinct usubjid)fromadae;quit; ↑向右滑动查看全部代码↑ 子集 在某些时候,我们可能只需要查询结果中的一个子集,这时候可以使用where子句进行子集的筛选。where 子句支持以下取子集的操作符: IS MISSING : 缺失值 IN : 属于某个集合 ...
proc sql;create tableAE_UIDasselect distinctUSUBJID,SITEID,SITENAME,ARMfromAE;quit; ↑向右滑动查看全部代码↑ 上述代码使用 SELECT 语句从数据集 AE 中查询所有发生了不良事件的受试者信息,并存储在新的数据集 AE_UID 中。 限定数据集名称 前面几个例子中,我们在 SELECT 语句中仅指定了查询的变量名,而没...
COUNT(DISTINCT b.STUDYID) AS "诊断人数", sum( case e.ReportScore when 5 then 1 else 0 end) as "甲", sum( case e.ReportScore when 4 then 1 else 0 end) as "乙", sum( case e.ReportScore when 3 then 1 else 0 end) as "丙", sum( case e.ReportScore when 2 then 1 else ...
SAS 中Proc SQL的应用与提高
e.g. count(distinct provider) as uniq_prac_cnt, count(*) count(provider) as record_cnt, as cnt_recs_w_provider Demonstration of calculated proc sql; create table attached_w_age_range as select *, floor(yrdif(datepart(birth_date), '31mar2013'd, 'AGE')) as age, 5 * (floor(...
TITLE3 'Exercise 2.3 - Getting Age Summaries by State'; PROC SQL ; CREATE TABLE agesum3 AS SELECT state ,COUNT(*) AS NumRes ,MEAN(Age) AS MeanAge ,SUM(Age_ge95) AS Num_95plus ,MEAN(Age_ge95) AS Prop_95plus FROM in.ressamp2014 GROUP BY state; QUIT; The GROUP BY syntax, ...