Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
126 views
in Technique[技术] by (71.8m points)

sql - Separating rows into columns

The date in which the status changes is being collected in one column, no matter if the status is sent or resent, etc. I would like the two dates to be separated into two columns. If anyone could help, that would be great!

Again, I'm using SSMS 2018.

What my table looks like:

+-------+--------+--------+------------+
| Code  | Name   | Status | StatusDate |
+-------+--------+--------+------------+     
|   221 | Kim    |  Resent|  2020-01-05|         
|   221 | Kim    |   Sent |  2020-01-01|             
+-------+--------+--------+---------+--+  

What I want it to look like:

+-------+--------+--------+-----------+-----------+
| Code  | Name   | Type   | SentDate  | ResentDate| 
+-------+--------+--------+-----------+-----------+     
|   221 | Kim    |   Book | 2020-01-01| 2020-01-05|                   
+-------+--------+--------+---------+-------------+  
question from:https://stackoverflow.com/questions/65946378/separating-rows-into-columns

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

I would use conditional aggreagtion:

select code, name, type,
       max(case when status = 'Sent' then statusdate end) as sent_date,
       max(case when status = 'Resent' then statusdate end) as resent_date
from t
group by code, name, type;

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...