Final Part - Min() Function

I have the final part of my report to complete. Yesterday I posted the most confusing set of threads ever on a public forum. So to cut the confusion, I am starting this thread again as now I know exactly what I need.

I have two tables each of which have a function that gathers data from them based around a set of parameters. This is then manipulated by a third function and the results of which are passed into a Stored Procedure. Here is the T-SQL syntax used for the SP;

SELECT fnWTRalldataReport.Areacode, fnWTRalldataReport.siteref, fnWTRalldataReport.estatename, fnWTRalldataReport.Securitised,

fnWTRalldataReport.unitref, fnWTRalldataReport.unittype, fnWTRalldataReport.unittype_count, fnWTRalldataReport.tenantname,

fnWTRalldataReport.tenantstatus, fnWTRalldataReport.tenantstatus_count, fnWTRalldataReport.unitstatus, fnWTRalldataReport.unitstatus_count,

fnWTRalldataReport.floortotal, fnWTRalldataReport.floortotocc, fnWTRalldataReport.floorspaceperc, fnWTRalldataReport.initialvacarea,

fnWTRalldataReport.initialvacnet, fnWTRalldataReport.TotalRent, fnWTRalldataReport.NetRent, fnWTRalldataReport.FinalRtLsincSC,

fnWTRalldataReport.rentrolldiscperc, fnWTRalldataReport.netrentpersqft, fnWTRalldataReport.ErvTot, fnWTRalldataReport.tenancyterm,

fnWTRalldataReport.landact, fnWTRalldataReport.datadate, fnWTRalldataReport.div_mgr, fnWTRalldataReport.portfolio_mgr,

fnWTRalldataReport.propcat, fnWTRalldataReport.budgeted_net_rent, fnWTRalldataReport.budgeted_occupancy,

fnWTRbudgetdata_1.budgeted_net_rent AS budget_rent, fnWTRbudgetdata_1.budgeted_occupancy AS budget_occ

FROM dbo.fnWTRalldataReport(@.dt_src_date, @.chr_div, @.vch_portfolio_no, @.vch_prop_cat) AS fnWTRalldataReport LEFT OUTER JOIN

dbo.fnWTRbudgetdata(@.dt_src_date) AS fnWTRbudgetdata_1 ON fnWTRalldataReport.siteref = fnWTRbudgetdata_1.site_ref

The result of this SQL places a value for budget_rent and budget_occ against every row that the 1st function's result set. What I want to achieve is that where the site_ref is equal in both functions results, I want it to place the budget_rent & budget_occ value against the first row only of each site_ref only.

To explain briefly the structure. Table one has various fields including site_ref and unit_ref. There are many unit_ref's per site_ref in this table. Table 2 has only site_ref and budget info. Someone yesterday suggested that I could achieve this my using something along the lines of the Min() function e.g. Min(unit_ref).

Could someone please elaborate on this for me. I have gone through my SQL book and read about min() and also BOL, but I can't quite work the syntax out to put the budget info against only one line per site based around the lowest unit_ref per site_ref.

This might seem confusing, but it is easier to read than the other thread I assure you.

Regards

If this is just for display, then I would suggest you just let the UI sort through this.

If not, you could try using temp tables to hold the results of the function calls:

select *, cast(0 as bit) as maxUnitRef
into #FNWTRALLDATAREPORT
from dbo.FNWTRALLDATAREPORT(parms)

... same with the other, no added column though

Then

UPDATE #FNWTRALLDATAREPORT
SET maxUnitRef = 1
WHERE unitRef = (select max(unitRef)
from #FNWTRALLDATAREPORT as f2
where f2.siteRef = #FNWTRALLDATAREPORT.siteRef)

Then in the final output just:

case when maxUnitRef = 1 then #FNWTRALLDATAREPORT.BUDGETED_NET_RENT else null end as BUDGETED_NET_RENT..

Does this make any sense? You might also be able to fabricate the maxUnitRef column in the function. Either way it is far easier to do this in the UI, instead of using SQL.

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Thank you for this, I will sort through it now. Yes in answer to your question, it is purely for display purposes only on the report.

Regards