英文:
How can I retrieve a list of table names and arrange them in ascending order based on their dates?
问题
以下是您要翻译的代码部分：
proc sql;select memnamefrom dictionary.tableswhere libname = 'KALP51' and memname like 'BRANCH_AQB_INDIA_%_MAIN'order by memname asc;quit;
英文:
I have some rows like this
BRANCH_AQB_INDIA_NOV2022_MAINBRANCH_AQB_INDIA_FEB2023_MAINBRANCH_AQB_INDIA_SEP2023_MAINBRANCH_AQB_INDIA_AUG2022_MAINBRANCH_AQB_INDIA_APR2023_MAINBRANCH_AQB_INDIA_JAN2024_MAIN
i want to sort them by asc like this
BRANCH_AQB_INDIA_AUG2022_MAINBRANCH_AQB_INDIA_NOV2022_MAINBRANCH_AQB_INDIA_FEB2023_MAINBRANCH_AQB_INDIA_APR2023_MAINBRANCH_AQB_INDIA_SEP2023_MAINBRANCH_AQB_INDIA_JAN2024_MAIN
Currently I'm just getting all the list with asc order like this in SAS
`proc sql;select memnamefrom dictionary.tableswhere libname = 'KALP51' and memname like 'BRANCH_AQB_INDIA_%_MAIN'order by memname asc;quit;`
答案1
得分: 2
从memname中提取日期字符串，将其转换为SAS日期，并按该值排序。您可以使用scan获取MONYY7.格式中倒数第二个日期字符串，然后使用input将其转换为SAS日期。使用outobs=1选项仅获取列表中的第一行。
proc sql outobs=1;select memnamefrom dictionary.tableswhere libname = 'KALP51' and memname like 'BRANCH_AQB_INDIA_%_MAIN'order by input(scan(memname, -2, '_'), monyy7.);quit;
memnameBRANCH_AQB_INDIA_AUG2022_MAIN
英文:
Extract the date string from memname, convert it to a SAS date, and order by that value. You can do this with scan to get the second-to-last date string in MONYY7. format, then use input to convert it to a SAS date. Use the outobs=1 option to only get the first row in the list.
proc sql outobs=1;select memnamefrom dictionary.tableswhere libname = 'KALP51' and memname like 'BRANCH_AQB_INDIA_%_MAIN'order by input(scan(memname, -2, '_'), monyy7.);quit;`
memnameBRANCH_AQB_INDIA_AUG2022_MAIN
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