proc sql;selectUSUBJID,SITEID,(casewhenHEIGHTU="m"then(casewhenWEIGHTU="kg"thenHEIGHT/WEIGHT**2whenWEIGHTU="pound"thenHEIGHT/(WEIGHT*0.4536)**2else-1end)whenHEIGHTU="cm"then(casewhenWEIGHTU="kg"thenHEIGHT/100/WEIGHT**2whenWEIGHTU="pound"thenHEIGHT/100/(WEIGHT*0.4536)**2else-1end)els...
CASE WHEN语句是一种条件逻辑表达式,用于在SQL查询中根据不同的条件返回不同的结果。它类似于编程语言中的if-then-else语句,但用于数据库查询。 优势 灵活性:可以根据多个条件返回不同的结果。 可读性:代码结构清晰,易于理解和维护。 性能:在某些情况下,使用CASE WHEN可以提高查询性能。 类型 简单CASE...
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case when table2.A < table2.C and table2.A > table3.D then table2.D else table3.D end as return1, case when table2.A < table2.C and table2.A > table3.D then table2.E else table3.E end as return2, case when table2.A < table2.C and table2.A .. case when table2....
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step stepId True string The identifier of the step to execute. name name string Name of the variable. value value The value of the variable. Returns This type describes the output values that are returned when a step is executed. Step Output stepOutput TriggersAgrandir...
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 ...
A new ODS statement enables you to render multiple ODS output formats without re-running a PROC or a DATA step. See theSAS Output Delivery System: User's Guide. Note: This section describes the features of Base SAS that are new or enhanced since SAS 8.2. ...
48. How to use IF THEN ELSE in PROC SQL? PROC SQL; SELECT WEIGHT, CASE WHEN WEIGHT BETWEEN 0 AND 50 THEN ’LOW’ WHEN WEIGHT BETWEEN 51 AND 70 THEN ’MEDIUM’ WHEN WEIGHT BETWEEN 71 AND 100 THEN ’HIGH’ ELSE ’VERY HIGH’ END AS NEWWEIGHT FROM HEALTH; QUIT; 49. How to remov...
SQLprocedureenablesyoutouseSQLwithintheSASsystem whichfollowstheguidelinessetbytheAmericanNational StandardsInstitute(ANSI). Inmanycases,theSQLprocedurereplacestheneedformultiple DATAandPROCstepswithonequery. Fudan_R_Module_0208103 Contents Overview ResearchModules:SQL ...