1
列表我需要寫一個條件,以確保病情不等於SQL語句的情況下,比較不等於與條件
select * from xtable x
inner join ytable y
on x.column1 =y.column1
inner join ztable z
on y.column2 =z.column2
where x.column4 = 'abc'
and y.column3 <> cast(z.column4 as bit)
and y.column4 = 'xyz'
我得到錯誤的造型,因爲y.column3只有0或1個值,其中z.column4具有多於0和1的值我怎樣才能使其他值爲0或1取決於值。
我sepreatly寫的select語句打印0和1,取決於病症
select case z.column4
when 'True' then 1
when 'false' then 0
when 'From: False To True' then 1
when 'From: True to False' then 0
end as status
from ztable z
我不能,如果寫這樣一起incorproate兩個,其給予了錯誤下面
select * from xtable x
inner join ytable y
on x.column1 =y.column1
inner join ztable z
on y.column2 =z.column2
where x.column4 = 'abc'
and y.column3 <> (case when z.column4 = 'True' then 1
when z.column4 = 'false' then 0
when z.column4 = 'From: False To True' then 1
when z.column4 = 'From: True to False' then 0)
and y.column4 = 'xyz'