select md5("?") =?, sleep(?), rand(?);
select * from my1 where md5( "?" ) =?;
select md5( "?" ) =?;
select * from my1 where md5("?") =?;
select sleep (?);
select * from tst where lname='?';
select ? , ? , ? , ? , ? , ? from tst;
select * from tst where fname like '?';
select * from tst where lname like '?' order by fname;
insert into tst values ("?","?"),("?",null),("?","?");
drop table if exists tst;
create table tst(fname varchar(?), lname varchar(?));
update tst set lname ="?" where fname like '?' or lname like '?';
delete from tst where lname like '?' and fname like '?';
select ? from tst where fname='?' or lname like '?';
select ?,?,?,? from tst where name='?' or name='?' or name='?' or name='?';
select count(?), count(?), count(?), count(?), count (?),count( ? ) from tst ;

