1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
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;
|
