create table ti (a int, b int, c int, d int, e int, f int, g int, key (a), key (b), key (a,b), key (c), key (a,c), key (b,c), key (a,b,c), key (d), key (a,d), key (b,d), key (a,b,d), key (c,d), key (a,c,d), key (b,c,d), key (a,b,c,d), key (e), key (a,e), key (b,e), key (a,b,e), key (c,e), key (a,c,e), key (b,c,e), key (a,b,c,e), key (d,e), key (a,d,e), key (b,d,e), key (a,b,d,e), key (c,d,e), key (a,c,d,e), key (b,c,d,e), key (a,b,c,d,e), key (f), key (a,f), key (b,f), key (a,b,f), key (c,f), key (a,c,f), key (b,c,f), key (a,b,c,f), key (d,f), key (a,d,f), key (b,d,f), key (a,b,d,f), key (c,d,f), key (a,c,d,f), key (b,c,d,f), key (a,b,c,d,f), key (e,f), key (a,e,f), key (b,e,f), key (a,b,e,f), key (c,e,f), key (a,c,e,f), key (b,c,e,f), key (a,b,c,e,f), key (d,e,f), key (a,d,e,f), key (b,d,e,f), key (a,b,d,e,f), key (c,d,e,f), key (a,c,d,e,f), key (b,c,d,e,f), key (a,b,c,d,e,f), key (g), key (a,g), key (b,g), key (a,b,g), key (c,g), key (a,c,g), key (b,c,g), key (a,b,c,g), key (d,g), key (a,d,g), key (b,d,g), key (a,b,d,g), key (c,d,g), key (a,c,d,g), key (b,c,d,g), key (a,b,c,d,g), key (e,g), key (a,e,g), key (b,e,g), key (a,b,e,g), key (c,e,g), key (a,c,e,g), key (b,c,e,g), key (a,b,c,e,g), key (d,e,g), key (a,d,e,g), key (b,d,e,g), key (a,b,d,e,g), key (c,d,e,g), key (a,c,d,e,g), key (b,c,d,e,g), key (a,b,c,d,e,g), key (f,g), key (a,f,g), key (b,f,g), key (a,b,f,g), key (c,f,g), key (a,c,f,g), key (b,c,f,g), key (a,b,c,f,g), key (d,f,g), key (a,d,f,g), key (b,d,f,g), key (a,b,d,f,g), key (c,d,f,g), key (a,c,d,f,g), key (b,c,d,f,g), key (a,b,c,d,f,g), key (e,f,g), key (a,e,f,g), key (b,e,f,g), key (a,b,e,f,g), key (c,e,f,g), key (a,c,e,f,g), key (b,c,e,f,g), key (a,b,c,e,f,g), key (d,e,f,g), key (a,d,e,f,g), key (b,d,e,f,g), key (a,b,d,e,f,g), key (c,d,e,f,g), key (a,c,d,e,f,g), key (b,c,d,e,f,g), key (a,b,c,d,e,f,g));
insert ti values (1,2,3,4,5,6,7,8), (null,null,null,null,null,null,null,null);
select * from ti;
show create table ti;
show keys from ti;
desc ti;