Is there a way to use window functions in MySQL queries dynamically within a SELECT query itself? (I know for a fact that it is possible in PostgreSQL).
For example, here is the equivalent query in PostgreSQL:
SELECT c_server_ip, c_client_ip, sum(a_num_bytes_sent) OVER
(PARTITION BY c_server_ip) FROM network_table;
However, what would be the corresponding query in MySQL?
Hope this might work:
select A.c_server_ip, A.c_client_ip, B.mySum
from network_table A, (
select c_server_ip, sum(a_num_bytes_sent) as mySum
from network_table group by c_server_ip
) as B
where A.c_server_ip=B.c_server_ip;
Starting MySQL 8.0, you can now use OVER and partition, so consider upgrading to the latest version :)
来源:https://stackoverflow.com/questions/21720073/window-function-in-mysql-queries