在1 if子句下有多个列

Question

我正在尝试编写如下的查询

select 

if drophip = 1 then
0 as a,
0 as b,
1 as c,
1 as d

else if drophip = 0 then
1 as a,
1 as b,
0 as c,
0 as d

end if; 

from tabl1;

它给出了语法错误。我有什么方法可以写同样的东西吗？

Answer 1

试试这个：

我认为您的弃权是boolean字段。

<强>查询

select 
case
    when drophip = 1 then 0
    else 1
end as a,
case
    when drophip = 1 then 0
    else 1
end as b,
case
    when drophip = 1 then 1
    else 0
end as c,
case
    when drophip = 1 then 1
    else 0
end as d
from tabl1;