I have a table called empty
as follows which only has the paperkey value and everything else is empty.
author | year | conference | paperkey
1234
And I have another table called base
as follows:
author | year | conference | paperkey
Andrew 1999 KDD 1234
I want to insert the value retrieved in table base
to table empty
.
I tried to query as follows but it did not work. How can I modify this query to get the right result?
insert into empty (author, year, conference)
select T1.author, T1.year, T1.conference
from base as T1
inner join empty as T2 on T1.paperkey=T2.paperkey;
I think you are looking to update empty
based on paperkey
update empty e
join base b on b.paperkey = e.paperkey
set
e.author = b.author,
e.year = b.year,
e.conference = b.conference
You want to update existing records, not insert new ones.
update empty T2
join base T1 on T1.paperkey = T2.paperkey
set T2.author = T1.author,
T2.year = T1.year,
T2.conference = T1.conference
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.