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drop table if exists t1; create table t1 ( id INTEGER AUTO_INCREMENT PRIMARY KEY, emp CHAR(10) NOT NULL, salary DECIMAL(6,2) NOT NULL, l INTEGER NOT NULL, r INTEGER NOT NULL); prepare st_ins from 'insert into t1 set emp = ?, salary = ?, l = ?, r = ?'; set @arg_nam= 'Jerry'; set @arg_sal= 1000; set @arg_l= 1; set @arg_r= 12; execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ; set @arg_nam= 'Bert'; set @arg_sal= 900; set @arg_l= 2; set @arg_r= 3; execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ; set @arg_nam= 'Chuck'; set @arg_sal= 900; set @arg_l= 4; set @arg_r= 11; execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ; set @arg_nam= 'Donna'; set @arg_sal= 800; set @arg_l= 5; set @arg_r= 6; execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ; set @arg_nam= 'Eddie'; set @arg_sal= 700; set @arg_l= 7; set @arg_r= 8; execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ; set @arg_nam= 'Fred'; set @arg_sal= 600; set @arg_l= 9; set @arg_r= 10; execute st_ins using @arg_nam, @arg_sal, @arg_l, @arg_r ; select * from t1; id emp salary l r 1 Jerry 1000.00 1 12 2 Bert 900.00 2 3 3 Chuck 900.00 4 11 4 Donna 800.00 5 6 5 Eddie 700.00 7 8 6 Fred 600.00 9 10 prepare st_raise_base from 'update t1 set salary = salary * ( 1 + ? ) where r - l = 1'; prepare st_raise_mgr from 'update t1 set salary = salary + ? where r - l > 1'; set @arg_percent= .10; set @arg_amount= 100; execute st_raise_base using @arg_percent; execute st_raise_mgr using @arg_amount; execute st_raise_base using @arg_percent; execute st_raise_mgr using @arg_amount; execute st_raise_base using @arg_percent; execute st_raise_mgr using @arg_amount; select * from t1; id emp salary l r 1 Jerry 1300.00 1 12 2 Bert 1197.90 2 3 3 Chuck 1200.00 4 11 4 Donna 1064.80 5 6 5 Eddie 931.70 7 8 6 Fred 798.60 9 10 prepare st_round from 'update t1 set salary = salary + ? - ( salary MOD ? )'; set @arg_round= 50; execute st_round using @arg_round, @arg_round; select * from t1; id emp salary l r 1 Jerry 1350.00 1 12 2 Bert 1200.00 2 3 3 Chuck 1250.00 4 11 4 Donna 1100.00 5 6 5 Eddie 950.00 7 8 6 Fred 800.00 9 10 drop table t1;