在MySql中生成僞列

Question

我有一個包含多個作業和多個部門的表，我希望以這樣的方式處理數據，以便它能夠提供部門明智和工作明智的薪資信息。我怎樣才能做到這一點？只能使用select和case還是類似來實現？

Answer 1

select deptno, 
     sum(case when job = 'Founder' then salary else 0 end) as Founder, 
     sum(case when job = 'Cofounder' then salary else 0 end) as Cofounder, 
     sum(case when job = 'Sales' then salary else 0 end) as Sales, 
     sum(case when job = 'Marketing' then salary else 0 end) as Marketing, 
     sum(case when job = 'Janitor' then salary else 0 end) as Janitor 
from your_table 
group by deptno