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...
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...
proc sql; execute( create table test as ( select table1.A, table1.B, 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 return...
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 ...
Overview By default, each missing numeric value is represented in query results by a single period (.). This sample shows you how to use the PROC SQL CASE statement to define a data item expression that will return a 0 instead of a . for each missing value in the query results. ...
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Investigation Analytics and Intelligent Case Management IoT Analytics: How to Make Your IoT Data Work for You Is your data and analytics eco-system ready for disruption? J JMP® Statistical Discovery K Key To Big Data Quality | SAS Keyways your curiosity will lead you to your dream career ...
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...
Horizontal spacing clearly shows clearly the beginning and ending of the DATA step and PROC steps. 水平间距清楚地清楚地示出了DATA步骤和PROC步骤的开始和结束。Use of case clearly distinguishes built-in SAS designations from those determined by the us...
无法读入Numbers with embedded commas or dollar signs are examples这些非标准的数值类型。 例如100,100,1 $100 日期型这些数据 1.3:格式输入 w=total width d=number of decimal 字符格式 $informatw. w.是标准的字符读入格式(不带informat) 数值格式 informatw.d w.d是标准的数值读入格式(不带informat) ...