proc sql的case when的用法 摘要: 1.简介 2.proc sql的case when语法 3.case when语句的基本用法 4.case when语句的复杂用法 5.总结 正文: 1.简介 在SAS编程中,`proc sql`是一个用于处理SQL查询的过程。在SQL查询中,`CASE` `WHEN`语句是一种条件分支语句,可以根据不同的条件返回不同的结果。本文将详细...
Case when 是 SQL 中的一种条件表达式,主要用于根据特定条件对查询结果进行分组或计算。其基本语法如下: ``` CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 ... ELSE resultN END ``` 其中,condition1、condition2 等为条件,result1、result2 等为对应的结果。CASE WHEN 语句会根据给定条件...
proc sql;selectUSUBJID,SITEID,SEX,(caseSEXwhen"F"then"男"when"M"then"女"else"未知"end)asSEXCfromDM;quit; 上述代码使用 CASE 表达式根据变量 SEX 的值衍生新的变量 SEXC,对于某一条观测,其变量 SEX 的值都会与指定的 WHEN 条件进行比较,直到符合某个 WHEN 条件,此时将 THEN 后面的结果作为查询结果...
Solution: proc sql;create table dummy as select a.*,b.epoch from dummy_vs as a left join dummy_se as b on case when a.usubjid=b.usubjid and epoch="SCREENING"and b.sestdy<=a.vsdy<b.seendythen"screening"when a.usubjid=b.usubjid and epoch="TREATMENT"and b.sestdy<=a.vsdy<...
Proc SQLis used/ Must be used for Many to Many merges. Solution: proc sql;create table dummy as select a.*,b.epoch from dummy_vs as a left join dummy_se as b on case when a.usubjid=b.usubjid and epoch="SCREENING"and b.sestdy<=a.vsdy<b.seendythen"screening"when a.usubjid...
TITLE3 'Exercise 3.2 Refine resident indicator to account for missing data'; PROC SQL ; CREATE TABLE phqsum2 AS SELECT * ,MEAN(phq9) AS StAvg_phq9 FORMAT=6.1 ,(phq9 > CALCULATED StAvg_phq9) AS phq9_high LENGTH=3 LABEL='PHQ9 above state mean' ,CASE WHEN (phq9 > CALCULATED St...
目标是使用if语句在输出表中创建多个列。我试图避免使用case-when,因为在实践中,8或9个输出取决于一个条件,使用case-when将增加代码的复杂性。 我是SAS的新手,下面是我的代码,但它不起作用。 %macro DPAPRDT: proc sql; execute( create table test as ( ...
Since today I am getting this error in Edge Dev (version 102.0.1220.1). The entire browser has become unusable as nothing seems to work at all. All pages return the previously mentioned error, add-ons are crashing, bookmark menu is blank, opening the settings doesnt work, etc. ...
The proc_UpdateDocument stored procedure is called to update the metadata and contents of a document. proc_UpdateDocument is defined using T-SQL syntax, as follows. PROCEDURE proc_UpdateDocument ( @DocSiteId uniqueidentifier ,@DocWebId uniqueidentifier ,@DocDirName nvarchar(256) ,@Doc...
I am not quite sure whether can I use proc sql case when like this as below: proc sql; create table new as select origianl* case when codes=' ', then rules.codes where codesdate=min(original.codesdate) else original.codes end as codes; quit; whehter can I use other more simple ...