asked on

SQL Query syntax help

Hello all,

I have the following query:

select MV.MVDate, DE.DataEntryID,
CU.ISOCurrencyCode
from [Customer].[snp].[MarketValueSnap] MV
inner join [Customer].[dbo].[cbiCurrency] CU ON MV.CurrencyID = CU.CurrencyID
inner join [Customer].[dbo].[cbiDataEntry] DE ON MV.DataEntryID = DE.DataEntryID

I then have a table called: docNote

In this table it has the following fields:
NoteID,
EntityID,
InstanceID,
Note

What I need to do somehow is get the Note from this table where EntityID = 9 (DataEntry) and InstanceID = DE.DataEntryID from my query. I only want to get the 1st note just in case there is more than one to protect myself. What is the best way to handle this?

Vitor Montalvão

Depends on which note do you want. The first one? The last one?

Phillip Burton

with myTable as (
select MV.MVDate, DE.DataEntryID,
CU.ISOCurrencyCode
from [Customer].[snp].[MarketValueSnap] MV
inner join [Customer].[dbo].[cbiCurrency] CU ON MV.CurrencyID = CU.CurrencyID
inner join [Customer].[dbo].[cbiDataEntry] DE ON MV.DataEntryID = DE.DataEntryID
)
Select top(1) Note
From docNote as D
inner join myTable as M on D.InstanceID = M.DataEntryID
where D.EntityID = 9

Member_2_861731

Just taking what Phillip did, and switching some things around:

with myTable as (
Select D.EntityID, MAX(Note) AS Note
From docNote as D
where D.EntityID = 9
group by D.EntityID
)
select MV.MVDate, DE.DataEntryID,
             CU.ISOCurrencyCode,
myTable.Note
 from [Customer].[snp].[MarketValueSnap] MV
 inner join [Customer].[dbo].[cbiCurrency] CU ON MV.CurrencyID = CU.CurrencyID
 inner join [Customer].[dbo].[cbiDataEntry] DE ON MV.DataEntryID = DE.DataEntryID
inner join myTable ON DE.DataEntryID = myTable.EntityID

Open in new window

Now you just have to tweak the CTE query to get the note that you really want.

Scott Pletcher

select MV.MVDate, DE.DataEntryID,
CU.ISOCurrencyCode,
dn.Note
from [Customer].[snp].[MarketValueSnap] MV
inner join [Customer].[dbo].[cbiCurrency] CU ON MV.CurrencyID = CU.CurrencyID
inner join [Customer].[dbo].[cbiDataEntry] DE ON MV.DataEntryID = DE.DataEntryID
cross apply (
select top (1) Note
from [Customer].[dbo].[docNote]
where
EntityID = 9 and
InstanceID = DE.DataEntryID
order by NoteID --desc
) as dn

sbornstein2

ASKER

I like the cross apply but it does not bring back records if there is no note.

Scott Pletcher

OOPS, sorry, quite right, I should have used
OUTER APPLY
rather than CA.

ASKER CERTIFIED SOLUTION

Scott Pletcher

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

PortletPaul

perhaps the use of a derived table using row_number() to get the latest note

SELECT
      MV.MVDate
    , DE.DataEntryID
    , CU.ISOCurrencyCode
    , DN.Note
FROM [Customer].[snp].[MarketValueSnap] MV
INNER JOIN [Customer].[dbo].[cbiCurrency] CU ON MV.CurrencyID = CU.CurrencyID
INNER JOIN [Customer].[dbo].[cbiDataEntry] DE ON MV.DataEntryID = DE.DataEntryID
LEFT JOIN (
            SELECT
                  InstanceID
                , Note
                , ROW_NUMBER() OVER (PARTITION BY InstanceID 
                                      ORDER BY NoteID DESC /* for latest */) AS RN
            FROM [Customer].[dbo].[docNote]
            WHERE EntityID = 9
      ) AS DN ON DE.DataEntryID = DN.InstanceID AND DN.RN = 1
;

Open in new window

sbornstein2

ASKER

this worked perfect and nice and clean thanks