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 1000.00112 2 Bert 900.0023 3 Chuck 900.00411 4 Donna 800.0056 5 Eddie 700.0078 6 Fred 600.00910
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 1300.00112 2 Bert 1197.9023 3 Chuck 1200.00411 4 Donna 1064.8056 5 Eddie 931.7078 6 Fred 798.60910
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 1350.00112 2 Bert 1200.0023 3 Chuck 1250.00411 4 Donna 1100.0056 5 Eddie 950.0078 6 Fred 800.00910
drop table t1;
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.0 Sekunden
(vorverarbeitet am 2026-10-08)
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