create table tb(a int ,b int,c int ,d as case when A=0 and B=1 and C=1 then 1 else 0 end)
go

insert into tb (a,b,c) values(0,1,1)
insert into tb (a,b,c) values(0,2,1)
insert into tb (a,b,c) values(0,1,2)
insert into tb (a,b,c) values(1,1,1)
insert into tb (a,b,c) values(2,1,1)

select * from tb

drop table tb

/*
a           b           c           d           
----------- ----------- ----------- ----------- 
0           1           1           1
0           2           1           0
0           1           2           0
1           1           1           0
2           1           1           0

（所影响的行数为 5 行）
*/

------解决方案--------------------


------解决方案--------------------
SQL code

select A,B,case C when A=1 and B=1 then D else C when A=2 and B=2 then E else C end as C,D,E from table 
--前提是D,E都要有数据。。。。