1 PROC SQL 基本格式: PROCSQL;sql-statement; sql-statement包括: ALTER CREATE DELETE DESCRIBE DROP INSERT SELECT UPDATE VALIDATE 与多数其他SAS过程不同,可以以交互方式或在批处理作业中使用,只需提交程序语句即可,无须RUN语句。SELECT语句的任何结果都会自动显示,
3. 在Proc步骤中，除了Proc statement以外，其他修饰statement的options则需要用反斜杠'/'与主干分隔开。...
Structured Query Language (SQL) is a universal computer language for all relational database management systems. PROC SQL is the implementation of the SQL syntax in SAS. It first appeared in SAS 6.0, and since then has been widely used for SAS users. PROC SQL greatly increases SAS’s flexibi...
NOTE:Statementtransformsto: select,,, from; 20quit; 这时,我们可以看到从表中选择了8个列 消除重复值 我们可以用distinct选项来消除重复值。例如,我们要得到没有重复的所有地区的名 称: procsql; selectdistinctRegion from quit; where子集查询 比较运算符 先列出where语句用到的比较运算符: LT小于 GT大于 EQ...
proc iml; a={1 2, 3 -4}; b={1 -1, 0 1}; if any(a<b) then do; print 1; print a; end; quit; 记得要加end啊。 2 循环语句 (1)DO To BY Dovariable=startTOstopBYincrement; Statement;End; 比如: 例子 proc iml; do i=10 to 100 by 20; print i; end; quit; ...
1procsql outobs=10;2selectflightnumber,date3fromsasuser.flightschedule; 日志提示:WARING: Statement terminated early due to OUTOBS=10 option. 2. 通过SELECT语句中的DISTINCT关键词来剔除重复行 【例子】: /*代码1*//*代码2*/ procsql outobs=12;procsql ;selectflightnumber, destinationselectdistinctfli...
在SAS中,IF THEN语句可以单独使用,也可以与ELSE和ELSE IF一起使用,构建更复杂的条件逻辑。 以下是对于不同使用情景下的IF THEN语句的示例: 简单的条件判断: 代码语言:txt 复制 IF condition THEN statement; 例如,如果有一个名为age的变量,我们可以使用以下语句根据年龄是否大于等于18来判断是否成年: ...
Of course, it is definitely ok that if we use “if…then/else”statement to complete this task. But I think we apply user-defined format is more efficient to handle this work. And programs are more easily to maintain if plenty of codes are r...
I am using proc sql to pull the variable names and labels from a datafile I have and put them into macro vars (one each for varnames and labels). The issue is that I only want to pull in the varname+label pairs for those variables that do not have year values in the labels. This...
SAS的报错记录:有MERROR(找不到macro)、SERROR(找不到变量)、MLOGIC(SAS将在日志中输出详细的执行情况)、MPRINT(SAS将在日志中输出翻译出来的SAS代码)、SYMBOLGEN(SAS将在日志中输出变量当时的赋值)。 SAS常见程序错误 最常见的大概就是少了结尾的分号...这里的报错一般是:ERROR 180-322: Statement is not vali...