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create table _user (id int,a int, b int, c int, d int, e int, f int, g int, h int, i int, j int, k int);
insert into _user (id,a,b,c,d,e,f,g,h,i,j,k) values (1,1,1,1,1,1,1,1,1,1,1,1);
insert into _user (id,a,b,c,d,e,f,g,h,i,j,k) values (2,2,2,1,1,1,1,1,1,1,2,2);
insert into _user (id,a,b,c,d,e,f,g,h,i,j,k) values (3,3,3,1,1,1,1,1,1,1,3,3);
SELECT a,b,c,d,e,f,g,h,i from _user where id=1
union
select j, k, null, null, null, null, null, null, null from _user
where id=3;
| a | b | c | d | e | f | g | h | i |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 3 | 3 | null | null | null | null | null | null | null |