Query to remove duplicate rows but instead displays single row - sql-server

Question

I have the following query that gave me the results of duplicate rows and that is not what I wanted
SELECT
OM_ITEM_MASTER.part_no PARTNO,
item_description DESCRIPTION,
item_manufacturer MANUFACTURER,
FM_PRICE_LIST.cost_price COSTPRICE
FROM OM_ITEM_MASTER, FM_PRICE_LIST
ORDER BY item_description
Result:
PARTNO DESCRIPTION MANUFACTURER COSTPRICE
NT321 NULL NULL 87665
NT321 NULL NULL 2957
NT321 NULL NULL 150
NT321 NULL NULL 67895
NT321 NULL NULL 5000
NT321 NULL NULL 5000
NT321 NULL NULL 459
NT321 NULL NULL 459
NT321 NULL NULL 45
NT321 NULL NULL 45
NT321 NULL NULL 45
NT321 NULL NULL 45
demore 87665
demore 2957
demore 150
demore 67895
demore 5000
demore 5000
demore 459
demore 459
demore 45
demore 45
demore 45
demore 45
4565 anne balls 87665
4565 anne balls 2957
4565 anne balls 150
4565 anne balls 67895
4565 anne balls 5000
4565 anne balls 5000
4565 anne balls 459
4565 anne balls 459
4565 anne balls 45
4565 anne balls 45
4565 anne balls 45
4565 anne balls 45
345 CRUNK WABCO 87665
345 CRUNK WABCO 2957
345 CRUNK WABCO 150
345 CRUNK WABCO 67895
345 CRUNK WABCO 5000
345 CRUNK WABCO 5000
345 CRUNK WABCO 459
345 CRUNK WABCO 459
345 CRUNK WABCO 45
345 CRUNK WABCO 45
345 CRUNK WABCO 45
345 CRUNK WABCO 45
24 desktop ibm 87665
24 desktop ibm 2957
24 desktop ibm 150
24 desktop ibm 67895
24 desktop ibm 5000
24 desktop ibm 5000
24 desktop ibm 459
24 desktop ibm 459
24 desktop ibm 45
24 desktop ibm 45
24 desktop ibm 45
24 desktop ibm 45
trtrt fdfd fdfdf 87665
trtrt fdfd fdfdf 2957
trtrt fdfd fdfdf 150
trtrt fdfd fdfdf 67895
trtrt fdfd fdfdf 5000
trtrt fdfd fdfdf 5000
trtrt fdfd fdfdf 459
trtrt fdfd fdfdf 459
trtrt fdfd fdfdf 45
trtrt fdfd fdfdf 45
trtrt fdfd fdfdf 45
trtrt fdfd fdfdf 45
TX900 FR NULL 87665
TX900 FR NULL 2957
TX900 FR NULL 150
TX900 FR NULL 67895
TX900 FR NULL 5000
TX900 FR NULL 5000
TX900 FR NULL 459
TX900 FR NULL 459
TX900 FR NULL 45
TX900 FR NULL 45
TX900 FR NULL 45
TX900 FR NULL 45
26 gdrn opiyo 87665
26 gdrn opiyo 2957
1 laptop microsoft 87665
1 laptop microsoft 2957
1 laptop microsoft 150
1 laptop microsoft 67895
1 laptop microsoft 5000
1 laptop microsoft 5000
1 laptop microsoft 459
1 laptop microsoft 459
1 laptop microsoft 45
1 laptop microsoft 45
1 laptop microsoft 45
1 laptop microsoft 45
23 laptop microsoft 87665
23 laptop microsoft 2957
23 laptop microsoft 150
23 laptop microsoft 67895
23 laptop microsoft 5000
23 laptop microsoft 5000
23 laptop microsoft 459
23 laptop microsoft 459
23 laptop microsoft 45
23 laptop microsoft 45
23 laptop microsoft 45
23 laptop microsoft 45
567 originals holly 87665
567 originals holly 2957
567 originals holly 150
567 originals holly 67895
567 originals holly 5000
567 originals holly 5000
567 originals holly 459
567 originals holly 459
567 originals holly 45
567 originals holly 45
567 originals holly 45
567 originals holly 45
2 pc ibm 87665
2 pc ibm 2957
2 pc ibm 150
2 pc ibm 67895
2 pc ibm 5000
2 pc ibm 5000
2 pc ibm 459
2 pc ibm 459
2 pc ibm 45
2 pc ibm 45
2 pc ibm 45
2 pc ibm 45
123 qwe asd 87665
123 qwe asd 2957
123 qwe asd 150
123 qwe asd 67895
123 qwe asd 5000
123 qwe asd 5000
123 qwe asd 459
123 qwe asd 459
123 qwe asd 45
123 qwe asd 45
123 qwe asd 45
123 qwe asd 45
347 ROOT MAN 87665
347 ROOT MAN 2957
347 ROOT MAN 150
347 ROOT MAN 67895
347 ROOT MAN 5000
347 ROOT MAN 5000
347 ROOT MAN 459
347 ROOT MAN 459
347 ROOT MAN 45
347 ROOT MAN 45
347 ROOT MAN 45
347 ROOT MAN 45
rt56 wer dfgg 87665
rt56 wer dfgg 2957
rt56 wer dfgg 150
rt56 wer dfgg 67895
rt56 wer dfgg 5000
rt56 wer dfgg 5000
rt56 wer dfgg 459
rt56 wer dfgg 459
rt56 wer dfgg 45
rt56 wer dfgg 45
rt56 wer dfgg 45
rt56 wer dfgg 45
then i made the following changes to the query
SELECT distinct
OM_ITEM_MASTER.part_no PARTNO,
item_description DESCRIPTION,
item_manufacturer MANUFACTURER,
FM_PRICE_LIST.cost_price COSTPRICE
FROM OM_ITEM_MASTER
inner join FM_PRICE_LIST on OM_ITEM_MASTER.[PART_NO] = FM_PRICE_LIST.[PART_NO]
order by ITEM_DESCRIPTION
but this displays only a single row and I want all the rows to be displayed but not duplicates. Below is the result:
PARTNO DESCRIPTION MANUFACTURER COSTPRICE
NT321 NULL NULL 87665

Answer 1

In the first example you are getting a cartesian product of the two tables as you haven't defined any join condition, whereas in the second example you have defined an inner join condition which limits the result set to those items present in both tables. Maybe there are products missing in the FM_PRICE_LIST table.
Try changing the inner join to a left join to include all products from the OM_ITEM_MASTER table even if there is no corresponding row in the other table.
Also, your sample data doesn't match the queries which is a bit confusing.