select x,y from l where x=4 or y=50;
select x,y from l where x>12 and y=34;
select name,x,y from l;
select name,x,y from l where x + y < 100;
select name,x,y from l where x = y+10;
select name,x,y from l where x=y;
select x,y,name from l where x-y>10;
select x,y,name from l where x-y>10 and x<50;
select name from l where x  > 80;
select name, x, y  from l where (x  < 100) ;
select name,y from l where x <= 77;
select name,x,y from l where x<90 and y>30;
select name from l where name = 'smith';
select name, x, y  from l where (x  < 50) ;
exit;

