salesdetail table

salesdetail is defined as follows:

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

Its primary keys are stor_id and ord_num:

sp_primarykey salesdetail, stor_id, ord_num

Its title_id, stor_id, and ord_num columns are foreign keys to titles and sales:

sp_foreignkey salesdetail, titles, title_id

sp_foreignkey salesdetail, sales, stor_id, ord_num

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 total_sales = isnull(total_sales, 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 total_sales = isnull(total_sales, 0) - (select sum(qty)
    from deleted
    where titles.title_id = deleted.title_id)
    where title_id in (select title_id from deleted)

Table A-5 lists the contents of salesdetail:

**Table A-5: salesdetail table**
stor_id	ord_num	title_id	qty	discount
7896	234518	TC3218	75	40.000000
7896	234518	TC7777	75	40.000000
7131	Asoap432	TC3218	50	40.000000
7131	Asoap432	TC7777	80	40.000000
5023	XS-135-DER-432-8J2	TC3218	85	40.000000
8042	91-A-7	PS3333	90	45.000000
8042	91-A-7	TC3218	40	45.000000
8042	91-A-7	PS2106	30	45.000000
8042	91-V-7	PS2106	50	45.000000
8042	55-V-7	PS2106	31	45.000000
8042	91-A-7	MC3021	69	45.000000
5023	BS-345-DSE-860-1F2	PC1035	1000	46.700000
5023	AX-532-FED-452-2Z7	BU2075	500	46.700000
5023	AX-532-FED-452-2Z7	BU1032	200	46.700000
5023	AX-532-FED-452-2Z7	BU7832	150	46.700000
5023	AX-532-FED-452-2Z7	PS7777	125	46.700000
5023	NF-123-ADS-642-9G3	TC7777	1000	46.700000
5023	NF-123-ADS-642-9G3	BU1032	1000	46.700000
5023	NF-123-ADS-642-9G3	PC1035	750	46.700000
7131	Fsoap867	BU1032	200	46.700000
7066	BA52498	BU7832	100	46.700000
7066	BA71224	PS7777	200	46.700000
7066	BA71224	PC1035	300	46.700000
7066	BA71224	TC7777	350	46.700000
5023	ZD-123-DFG-752-9G8	PS2091	1000	46.700000
7067	NB-3.142	PS2091	200	46.700000
7067	NB-3.142	PS7777	250	46.700000
7067	NB-3.142	PS3333	345	46.700000
7067	NB-3.142	BU7832	360	46.700000
5023	XS-135-DER-432-8J2	PS2091	845	46.700000
5023	XS-135-DER-432-8J2	PS7777	581	46.700000
5023	ZZ-999-ZZZ-999-0A0	PS1372	375	46.700000
7067	NB-3.142	BU1111	175	46.700000
5023	XS-135-DER-432-8J2	BU7832	885	46.700000
5023	ZD-123-DFG-752-9G8	BU7832	900	46.700000
5023	AX-532-FED-452-2Z7	TC4203	550	46.700000
7131	Fsoap867	TC4203	350	46.700000
7896	234518	TC4203	275	46.700000
7066	BA71224	TC4203	500	46.700000
7067	NB-3.142	TC4203	512	46.700000
7131	Fsoap867	MC3021	400	46.700000
5023	AX-532-FED-452-2Z7	PC8888	105	46.700000
5023	NF-123-ADS-642-9G3	PC8888	300	46.700000
7066	BA71224	PC8888	350	46.700000
7067	NB-3.142	PC8888	335	46.700000
7131	Asoap432	BU1111	500	46.700000
7896	234518	BU1111	340	46.700000
5023	AX-532-FED-452-2Z7	BU1111	370	46.700000
5023	ZD-123-DFG-752-9G8	PS3333	750	46.700000
8042	13-J-9	BU7832	300	51.700000
8042	13-E-7	BU2075	150	51.700000
8042	13-E-7	BU1032	300	51.700000
8042	13-E-7	PC1035	400	51.700000
8042	91-A-7	PS7777	180	51.700000
8042	13-J-9	TC4203	250	51.700000
8042	13-E-7	TC4203	226	51.700000
8042	13-E-7	MC3021	400	51.700000
8042	91-V-7	BU1111	390	51.700000
5023	AB-872-DEF-732-2Z1	MC3021	5000	50.000000
5023	NF-123-ADS-642-9G3	PC8888	2000	50.000000
5023	NF-123-ADS-642-9G3	BU2075	2000	50.000000
5023	GH-542-NAD-713-9F9	PC1035	2000	50.000000
5023	ZA-000-ASD-324-4D1	PC1035	2000	50.000000
5023	ZA-000-ASD-324-4D1	PS7777	1500	50.000000
5023	ZD-123-DFG-752-9G8	BU2075	3000	50.000000
5023	ZD-123-DFG-752-9G8	TC7777	1500	50.000000
5023	ZS-645-CAT-415-1B2	BU2075	3000	50.000000
5023	ZS-645-CAT-415-1B2	BU2075	3000	50.000000
5023	XS-135-DER-432-8J2	PS3333	2687	50.000000
5023	XS-135-DER-432-8J2	TC7777	1090	50.000000
5023	XS-135-DER-432-8J2	PC1035	2138	50.000000
5023	ZZ-999-ZZZ-999-0A0	MC2222	2032	50.000000
5023	ZZ-999-ZZZ-999-0A0	BU1111	1001	50.000000
5023	ZA-000-ASD-324-4D1	BU1111	1100	50.000000
5023	NF-123-ADS-642-9G3	BU7832	1400	50.000000
5023	BS-345-DSE-860-1F2	TC4203	2700	50.000000
5023	GH-542-NAD-713-9F9	TC4203	2500	50.000000
5023	NF-123-ADS-642-9G3	TC4203	3500	50.000000
5023	BS-345-DSE-860-1F2	MC3021	4500	50.000000
5023	AX-532-FED-452-2Z7	MC3021	1600	50.000000
5023	NF-123-ADS-642-9G3	MC3021	2550	50.000000
5023	ZA-000-ASD-324-4D1	MC3021	3000	50.000000
5023	ZS-645-CAT-415-1B2	MC3021	3200	50.000000
5023	BS-345-DSE-860-1F2	BU2075	2200	50.000000
5023	GH-542-NAD-713-9F9	BU1032	1500	50.000000
5023	ZZ-999-ZZZ-999-0A0	PC8888	1005	50.000000
7896	124152	BU2075	42	50.500000
7896	124152	PC1035	25	50.500000
7131	Asoap132	BU2075	35	50.500000
7067	NB-1.142	PC1035	34	50.500000
7067	NB-1.142	TC4203	53	50.500000
8042	12-F-9	BU2075	30	55.500000
8042	12-F-9	BU1032	94	55.500000
7066	BA27618	BU2075	200	57.200000
7896	124152	TC4203	350	57.200000
7066	BA27618	TC4203	230	57.200000
7066	BA27618	MC3021	200	57.200000
7131	Asoap132	MC3021	137	57.200000
7067	NB-1.142	MC3021	270	57.200000
7067	NB-1.142	BU2075	230	57.200000
7131	Asoap132	BU1032	345	57.200000
7067	NB-1.142	BU1032	136	57.200000
8042	12-F-9	TC4203	300	62.200000
8042	12-F-9	MC3021	270	62.200000
8042	12-F-9	PC1035	133	62.200000
5023	AB-123-DEF-425-1Z3	TC4203	2500	60.500000
5023	AB-123-DEF-425-1Z3	BU2075	4000	60.500000
6380	342157	BU2075	200	57.200000
6380	342157	MC3021	250	57.200000
6380	356921	PS3333	200	46.700000
6380	356921	PS7777	500	46.700000
6380	356921	TC3218	125	46.700000
6380	234518	BU2075	135	46.700000
6380	234518	BU1032	320	46.700000
6380	234518	TC4203	300	46.700000
6380	234518	MC3021	400	46.700000