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/W
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...
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 ...
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. This sample us...
These tutorials are ideal for people who are new to SQL programming. PROC SQL is an advanced SAS procedure for SQL. It allows us to run SQL queries. Proc SQL Tutorial for Beginners (20 Examples) CASE WHEN Statement in PROC SQL Proc SQL Joins (Merging) ...
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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 ...
null是Java中的关键字。就像每种原始类型都有默认值一样，如int默认值为0，boolean的默认值为false，null是任何引用类型的默认值，不严格的说是所有object类型的默认值。
SAS SQL能比较方便地汇总和查询SAS数据集，还能与外部的SQL库进行连接。PROC SQL: Beyond the Basics ...
ExamplesofSQLCodeandComparable SAS Code Example 1: Creating an output listing with Proc SQL versus a Data Step Filename out ‘C’:\temp.txt’ new; *; Proc Printo print=out; Run; *; Proc SQL; Select monotonic() as obs, a.State, a.City as Town, ...