salesdetail table

salesdetail is defined as follows:

create table salesdetail
(stor_id char(4) not null
    references sales(stor_id),
ord_num numeric(6,0)
    references sales(ord_num),
title_id tid not null
    references titles(title_id),
qty smallint not null,
discount float not null)

Its nonclustered index for the title_id column is defined as:

create nonclustered index titleidind
on salesdetail (title_id)

Its nonclustered index for the stor_id column is defined as:

create nonclustered index salesdetailind
on salesdetail (stor_id)

Its title_idrule rule is defined as:

create rule title_idrule
as
@title_id like "BU[0-9][0-9][0-9][0-9]" or
@title_id like "[MT]C[0-9][0-9][0-9][0-9]" or
@title_id like "P[SC][0-9][0-9][0-9][0-9]" or
@title_id like "[A-Z][A-Z]xxxx" or
@title_id like "[A-Z][A-Z]yyyy"

salesdetail uses the following trigger:

create trigger totalsales_trig on salesdetail
    for insert, update, delete
as
/* Save processing:  return if there are no rows affected */
if @@rowcount = 0
    begin
       return
end
/* add all the new values */
/* use isnull:  a null value in the titles table means 
**              "no sales yet" not "sales unknown"
*/
update titles
    set num_sold = isnull(num_sold, 0) + (select sum(qty)
    from inserted
    where titles.title_id = inserted.title_id)
    where title_id in (select title_id from inserted)
/* remove all values being deleted or updated */
update titles
    set num_sold = isnull(num_sold, 0) - (select sum(qty)
    from deleted
    where titles.title_id = deleted.title_id)
    where title_id in (select title_id from deleted)

Table B-5 lists the contents of salesdetail:

**Table B-5: salesdetail table**
stor_id	ord_num	title_id	qty	discount
7896	100014	TC3218	75	40.000000
7896	100014	TC7777	75	40.000000
7131	100017	TC3218	50	40.000000
7131	100017	TC7777	80	40.000000
5023	100020	TC3218	85	40.000000
8042	100016	PS3333	90	45.000000
8042	100016	TC3218	40	45.000000
8042	100016	PS2106	30	45.000000
8042	100023	PS2106	50	45.000000
8042	100015	PS2106	31	45.000000
8042	100016	MC3021	69	45.000000
5023	100009	PC1035	1000	46.700000
5023	100007	BU2075	500	46.700000
5023	100007	BU1032	200	46.700000
5023	100007	BU7832	150	46.700000
5023	100007	PS7777	125	46.700000
5023	100018	TC7777	1000	46.700000
5023	100018	BU1032	1000	46.700000
5023	100018	PC1035	750	46.700000
7131	100004	BU1032	200	46.700000
7066	100012	BU7832	100	46.700000
7066	100021	PS7777	200	46.700000
7066	100021	PC1035	300	46.700000
7066	100021	TC7777	350	46.700000
5023	100025	PS2091	1000	46.700000
7067	100019	PS2091	200	46.700000
7067	100019	PS7777	250	46.700000
7067	100019	PS3333	345	46.700000
7067	100019	BU7832	360	46.700000
5023	100020	PS2091	845	46.700000
5023	100020	PS7777	581	46.700000
5023	100027	PS1372	375	46.700000
7067	100019	BU1111	175	46.700000
5023	100020	BU7832	885	46.700000
5023	100025	BU7832	900	46.700000
5023	100007	TC4203	550	46.700000
7131	100004	TC4203	350	46.700000
7896	100014	TC4203	275	46.700000
7066	100021	TC4203	500	46.700000
7067	100019	TC4203	512	46.700000
7131	100004	MC3021	400	46.700000
5023	100007	PC8888	105	46.700000
5023	100018	PC8888	300	46.700000
7066	100021	PC8888	350	46.700000
7067	100019	PC8888	335	46.700000
7131	100017	BU1111	500	46.700000
7896	100014	BU1111	340	46.700000
5023	100007	BU1111	370	46.700000
5023	100025	PS3333	750	46.700000
8042	100014	BU7832	300	51.700000
8042	100013	BU2075	150	51.700000
8042	100013	BU1032	300	51.700000
8042	100013	PC1035	400	51.700000
8042	100016	PS7777	180	51.700000
8042	100014	TC4203	250	51.700000
8042	100013	TC4203	226	51.700000
8042	100013	MC3021	400	51.700000
8042	100023	BU1111	390	51.700000
5023	100003	MC3021	5000	50.000000
5023	100018	PC8888	2000	50.000000
5023	100018	BU2075	2000	50.000000
5023	100010	PC1035	2000	50.000000
5023	100022	PC1035	2000	50.000000
5023	100022	PS7777	1500	50.000000
5023	100025	BU2075	3000	50.000000
5023	100025	TC7777	1500	50.000000
5023	100026	BU2075	3000	50.000000
5023	100026	BU2075	3000	50.000000
5023	100020	PS3333	2687	50.000000
5023	100020	TC7777	1090	50.000000
5023	100020	PC1035	2138	50.000000
5023	100027	MC2222	2032	50.000000
5023	100027	BU1111	1001	50.000000
5023	100022	BU1111	1100	50.000000
5023	100018	BU7832	1400	50.000000
5023	100009	TC4203	2700	50.000000
5023	100010	TC4203	2500	50.000000
5023	100018	TC4203	3500	50.000000
5023	100009	MC3021	4500	50.000000
5023	100007	MC3021	1600	50.000000
5023	100018	MC3021	2550	50.000000
5023	100022	MC3021	3000	50.000000
5023	100026	MC3021	3200	50.000000
5023	100009	BU2075	2200	50.000000
5023	100010	BU1032	1500	50.000000
5023	100027	PC8888	1005	50.000000
7896	100013	BU2075	42	50.500000
7896	100013	PC1035	25	50.500000
7131	100005	BU2075	35	50.500000
7067	100011	PC1035	34	50.500000
7067	100011	TC4203	53	50.500000
8042	100015	BU2075	30	55.500000
8042	100015	BU1032	94	55.500000
7066	100001	BU2075	200	57.200000
7896	100013	TC4203	350	57.200000
7066	100001	TC4203	230	57.200000
7066	100001	MC3021	200	57.200000
7131	100005	MC3021	137	57.200000
7067	100011	MC3021	270	57.200000
7067	100011	BU2075	230	57.200000
7131	100005	BU1032	345	57.200000
7067	100011	BU1032	136	57.200000
8042	100015	TC4203	300	62.200000
8042	100015	MC3021	270	62.200000
8042	100015	PC1035	133	62.200000
5023	100002	TC4203	2500	60.500000
5023	100002	BU2075	4000	60.500000
6380	100028	BU2075	200	57.200000
6380	100028	MC3021	250	57.200000
6380	100029	PS3333	200	46.700000
6380	100029	PS7777	500	46.700000
6380	100029	TC3218	125	46.700000
6380	100014	BU2075	135	46.700000
6380	100014	BU1032	320	46.700000
6380	100014	TC4203	300	46.700000
6380	100014	MC3021	400	46.700000