yyyymm 转换为完整的 sas 日期 (dd/mm/ccyy) - SAS [英] yyyymm convert to full sas date (dd/mm/ccyy) - SAS

问题描述

我正在尝试从 SAS (ccyymm) 中的字段数字中获取该月的最后一天.

I am trying to get the last day of the month from a field numeric in SAS (ccyymm).

例如201401 将是 31-01-2014.

for example 201401 would be 31-01-2014.

我已经设法使该字段显示为日期类型字段(尽管仍显示为 ccyymm)，并在 PROC SQL SELECT 语句

I have managed to get the field to show as a date type field (still showing as ccyymm though) with the following code in a PROC SQL SELECT statement

year_month_field INFORMAT YYMMN6. AS year_month_date

我认为我从另一个被问到的问题中找到了一些代码，一旦我可以得到完整的日期，应该给我这个月的最后一天.

I think that I found some code from another question that had been asked that should give me the last day of the month once I can get the full date.

INTNX ( MONTH , year_month_date , 1) -1 

这行得通吗?如果没有任何其他建议，我们将不胜感激.

Will this work? If not any other suggestions would be appreciated.

丹

推荐答案

请注意下面如何将 yyyymm 转换为本月最后一天"MMMYYYY 格式之间的区别，具体取决于 yyyymm 是字符变量还是数字变量.

Note the difference between how one would convert a yyyymm to "last day of the month"MMMYYYY format below, depending on whether yyyymm is character or numeric variable.

data test;
yyyymm_character='201401';
yyyymm_numeric=201401;

date1=intnx('month', input(yyyymm_character, yymmn6.), 1)-1;
date2=intnx('month', input(put(yyyymm_numeric,6.), yymmn6.), 1)-1;
format date1 date2 date9.;
/*date1=date2=31jan2014*/
run;

或者，您可以使用 intnx 函数的内置选项将任何输入日期自动设置为相应月份的最后一天.如下图使用'e'.

Alternatively, you can use the in-built options for intnx functions to automatically set any input date to the last day of the respective month. Use 'e' as shown below.

data test;
yyyymm_character='201401';
yyyymm_numeric=201401;

date1=intnx('month', input(yyyymm_character, yymmn6.), 0, 'e');
date2=intnx('month', input(put(yyyymm_numeric,6.), yymmn6.), 0,'e');
format date1 date2 date9.;
/*date1=date2=31jan2014*/
run

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