SQL Where for multiple condition - sql

Question

I am trying to filter a data in SQL 2008 using where to create purchase order report. I want to say if Item Price < $2 and we sold 1 sale at least within a month then show me all items their quantity on had are less than 12 AND if Item Price < $10 and we sold 1 sale at least within three months then show me all items their quantity on had are less than 4 AND if Item Price < $50 and we sold 1 sale at least within six months then show me all items their quantity on had are less than 2 AND if Item Price < $100 and we sold 1 sale at least within nine months then show me all items their quantity on had are less than 1
Is any way I can do that. Please advise with syntax. The price filed is PREC_1, Quantity filed is QTY_ON_HND, Sale Date is SALD_DAT and sold quantity is QTY_SOLD
I will appreciate your help
Here is the query I made
`SELECT
'-- Select from IM_IN'
enter code hereM.ITEM_NO,
enter code hereM.DESCR,
enter code hereN.QTY_ON_HND,
enter code hereCASE
enter code hereWHEN N.QTY_ON_HND<0
enter code hereTHEN 0
enter code hereELSE N.QTY_ON_HND
enter code hereEND AS QTY_HND,
enter code hereN.LST_COST,
enter code hereN.LST_RECV_DAT,
enter code here--Select from IM_ITEM
enter code hereM.CATEG_COD,
enter code hereM.ATTR_COD_1,
enter code hereM.ITEM_VEND_NO,
enter code hereM.ALT_1_UNIT,
enter code hereM.ALT_1_NUMER,
enter code hereM.PRC_1,
enter code hereM.LST_COST,
enter code here--Select from PS_TKT_HIST_LIN
enter code heresum (S.QTY_SOLD) AS QTY_SOLD,
enter code herecount (S.BUS_DAT) AS SALS_DATS
enter code hereFROM
enter code heredbo.IM_INV N
enter code hereINNER JOIN dbo.IM_ITEM M
enter code hereON
enter code hereN.ITEM_NO = M.ITEM_NO
enter code hereINNER JOIN
enter code heredbo.PS_TKT_HIST_LIN S
enter code hereON
enter code hereN.ITEM_NO = S.ITEM_NO
enter code hereWHERE S.BUS_DAT>getdate()-270 AND N.QTY_ON_HND <4 AND M.PRC_1 <2
enter code hereGroup by
enter code hereM.ITEM_NO,
enter code hereM.DESCR,
enter code hereM.ITEM_VEND_NO,
enter code hereM.CATEG_COD,
enter code hereM.ATTR_COD_1,
enter code hereN.QTY_ON_HND,
enter code hereN.LST_COST,
enter code hereN.LST_RECV_DAT,
enter code hereN.LST_SAL_DAT,
enter code hereM.ALT_1_UNIT,
enter code hereM.ALT_1_NUMER,
enter code hereM.PRC_1,
enter code hereM.LST_COST,
enter code hereOrder by M.ITEM_NO`

Answer 1

You are going to need to combine 2 types of filtering.
"Item Price < $2" -> This needs a WHERE Clause
EG
WHERE [item price] < 2
" we sold 1 sale at least within a month"
This is an Aggregate type filter so you need to use HAVING
HAVING COUNT(*) > 1
Plus a Grouping clause
GROUP BY DATEPART(mm, bus_dt)
As you have a lot of criteria - I'd suggest you break it down and start at the top. Then work your way down once you have the first set of filters working ...
It might be beneficial to try and tabulate all the different criteria into a simple EXCEL table.
EG
Add a row for every OR and a column for every AND condition.
Bon Chance!