select  md5("200000foo") =10, sleep(2), rand(100);
 select * from my1 where md5(  "110"      ) =10;
 select  md5(  "100foo"  )  =10;
	 select * from  my1 where md5("100") =10;
	 select sleep  (2);
		 select  *  from    tst     where lname='Doe';
		 select  1 , 2 , 3 , 4 , 5 , 6 from tst;
		 select * from tst where fname  like '%a%';
 		 select * from tst where lname like '%e%'  order by fname; 
 		 insert into tst values ("John","Doe"),("Plato",null),("Nietzsche","");	  
 		 drop        table if exists tst;	  
 		 create table       tst(fname varchar(30), lname varchar(30));	  
 		 update tst set lname                      ="Human" where fname like '%a%' or lname like '%a%';	  
 		 delete from tst where lname like '%man%'  and fname like '%ard%';	  
 		 select 100 from tst where fname='10' or lname like '%100%';	  
 		 select 1,20,300,4000 from tst where name='1000' or name='200' or name='30' or name='4';	  
 		 select count(1),   count(10),   count(100),      count(2),  count  (20),count(  200  ) from  tst  ;