SAS函数可用于DATA步编程、WHERE表达式、宏语言语句、PROC REPORT和结构化查询语言SQL。而在众多的SAS函数中,最常用到的莫过于字符串函数了,而本篇推文就会为大家详细介绍一下SAS中常用的字符串函数。 01 Substr(s,p,n) 【功能】:字符串的替换和字符串的提取 【...
问使用SUBSTR和CHARINDEX into PROC SQL (SAS)ENSUBSTR(str,pos,len) substr用来截取字符串； str 被...
由于SAS数据集之间的关系一般不会用到,只是在proc sql中有所涉及,至今尚未运用过用于数据分析,所以在这里只讲单个数据集的处理。 在proc sql中我们可以看到:在定义数据集时涉及到字段名,字段属性,字段标签这三个最常用。我们在数据清洗时涉及到的数据集字段的处理,主要也就是围绕着字段名、字段属性和字段标签来进行...
【例3.1】SUBSTR函数实际开发中的截取功能应用,读取外部数据文件,存储在“d:\sastest\yxy”目录中的zfcl1.dat文件中,从身份证号中取出每一个人的出生年份。 程序如下: 【程序解读】 程序中通过SUBSTR语句定义了新变量age,此变量的值为substr(hm,7,4)函数从身份证号码第7位截取、取4个字节的值,这是身份证号...
I'm really not good with PROC SQL coding so any help you can give me here would be appreciated. 0 Likes Reply 5 REPLIES Kurt_Bremser Super User Re: ERROR: Function SUBSTR requires a character expression as argument 1. when linking by DOB Posted 07-09-2020 01:41 PM (6969...
Returns first position of alphabetic character value. Note that special characters such as '< >' are not considered alphabetic characters and not identified with the ANYALPHA() function. May need to also apply SUBSTR(XXX, 1, 1) ^='<' for example. - if ANYALPHA()= 0 then only numeric ...
SAS/BASE提供的函数有两种形式:一种是“FUNCTION”(后面用“函数”),可以进行计算并且会返回值;另一种是“CALL routine”(后面用“CALL例程”),用来改变变量的值或者执行其他的系统函数,但不返回值。SAS函数可以非常方便的用于DATA步中,WHERE子句和SQL查询语句中;CALL例程一般用于DATA步中。SAS提供了种类繁多的函数...
SELECT语句是PROCSQL的主要工具。使用SELECT语句可以识别、检索和操作表中的数据，使用SELECT子句可以设定查询条件。SELECT语句格式 SELECT<DISTINCT>object-item<,...object-item><INTOmacro-variable-specification <,...macro-variable-specification>>FROMfrom-list<WHEREsql-expression><GROUPBYgroup-by-item <,......
No, Proc Means requires at least one numeric variable. 24. How SUBSTR function works? The SUBSTR function is used to extract substring from a character variable. The SUBSTR function has three arguments: SUBSTR ( character variable, starting point to begin reading the variable, number of character...
If you have used repetitive INDEX and SUBSTR functions to determine how many times a “word” occurs in a character string, that task can also be accomplished more easily in Version 9. The COUNT function determines the number of times argument 2 occurs in argument 1. ...