Hope somebody can help me with this. I'm trying to pull a list of forthcoming titles (I work in publishing) via ODBC/ms query. I want (amongst other things) to show their internal status (approved, prepress etc.). The database stores the change dates for the status'. I seem to be getting one line per status per title. So if the title has changed status 6 times, I will get 6 lines. But I only want to show the latest status...
The date is in BL_PROJECT_TO_STATUS.STATUS_DATE (I've inserted a date criteria beneath, just to make it more visible).
How can this be done? I'm very new to ODBC and would appreciate it a lot.
SELECT DISTINCT
BL_PROJECT.EXP_PUB_DATE, BL_PROJECT.EAN, BL_PROJECT.TITEL,
MEDIATYPE.DESCRIPTION, BL_PROJECT_STATUS.DESCRIPTION
FROM
FIRMA1.BL_PROJECT BL_PROJECT, FIRMA1.BL_PROJECT_STATUS BL_PROJECT_STATUS,
FIRMA1.BL_PROJECT_TO_STATUS BL_PROJECT_TO_STATUS, FIRMA1.MEDIATYPE MEDIATYPE
WHERE
BL_PROJECT.PROJECT_ID = BL_PROJECT_TO_STATUS.PROJECT_ID AND
BL_PROJECT_TO_STATUS.STATUS_ID = BL_PROJECT_STATUS.CODE AND
BL_PROJECT.MEDIATYPE = MEDIATYPE.ID AND
((BL_PROJECT.PROJECT_TYPE = 2) AND
(BL_PROJECT.EXP_PUB_DATE Between SYSDATE AND (SYSDATE+90)) AND
(BL_PROJECT_TO_STATUS.STATUS_DATE = {ts '2013-11-20 00:00:00'}))
ORDER BY
BL_PROJECT.EXP_PUB_DATE, BL_PROJECT.EAN, BL_PROJECT.TITEL
Here is the general idea. You can adapt it with your table and field names.
select somefields
from sometables
join
(select something, max(datetimefield) maxdt
from table1
where whatever
group by something ) temp on table1.datetimefield = maxdt
etc
Related
I'm facing a problem successfully completing (running) a query on a singular table in Access 2013 using SQL to complete a Datediff on consecutive/Sequential rows of timestamps, which track status changes in tickets going through our ticketing system.
The table titled: dbo_Master3_FieldHistory, has a field which tracks timestamps each time a ticket's status changes. Unfortunately, it only includes 1 timestamp per change, meaning it doesn't inherently have a secondary timestamp for when the status is changed again, which I need to run a DateDiff to calculate AGE for tickets, based on Status.
I found a plausible solution for this on StackOverflow, linked below. When i tried to implement this solution, as is with minor adjustments, and including adjustments for filtering out old data and particular fields, it just freezes my Access program and never times out (have to force close Access)
Date Difference between consecutive rows
'This is the basic code, traslated from the linked StackOverflow solution to fit this tables fields (I believed)
SELECT T.mrID, T.mrSEQUENCE, T.mrUSERID, T.mrFIELDNAME, T.mrNEWFIELDVALUE, T.mrOLDFIELDVALUE, T.mrTIMESTAMP, T.mrNextTIMESTAMP, DateDiff("s",T.mrTIMESTAMP, T.mrNextTIMESTAMP) AS STATUSTIME
FROM (
SELECT T1.mrID, T1.mrSEQUENCE, T1.mrUSERID, T1.mrFIELDNAME, T1.mrNEWFIELDVALUE, T1.mrOLDFIELDVALUE, T1.mrTIMESTAMP,
(SELECT MIN(mrTIMESTAMP)
FROM dbo_MASTER3_FIELDHISTORY AS T2
WHERE T2.mrID = T1.mrID
AND T2.mrTIMESTAMP > T1.mrTIMESTAMP
) As mrNextTIMESTAMP
FROM dbo_MASTER3_FIELDHISTORY AS T1
) AS T
'This is the code that I wanted to use to account for filtering out two particular fields, limiting the data to tickets (mrID) newer than 1/1/2018 and only those where the mrFIELDNAME is mrSTATUS
SELECT T.mrID, T.mrSEQUENCE, T.mrUSERID, T.mrFIELDNAME, T.mrNEWFIELDVALUE, T.mrOLDFIELDVALUE, T.mrTIMESTAMP, T.mrNextTIMESTAMP, DateDiff("s",T.mrTIMESTAMP, T.mrNextTIMESTAMP) AS STATUSTIME
FROM (
SELECT T1.mrID, T1.mrSEQUENCE, T1.mrUSERID, T1.mrFIELDNAME, T1.mrNEWFIELDVALUE, T1.mrOLDFIELDVALUE, T1.mrTIMESTAMP,
(SELECT MIN(mrTIMESTAMP)
FROM dbo_MASTER3_FIELDHISTORY AS T2
WHERE mrFIELDNAME = "mrSTATUS"
AND T2.mrID = T1.mrID
AND T2.mrTIMESTAMP > T1.mrTIMESTAMP
) As T1.mrNextTIMESTAMP
FROM dbo_MASTER3_FIELDHISTORY AS T1
WHERE mrFIELDNAME = "mrSTATUS"
AND mrTIMESTAMP >= #1/1/2018#
) AS T;
Access freezes when I try to run these queries. I've tried several ways but can't get it to work
I was able to figure it out, thank you to those who took your time to read through this interesting challenge. Instead of using the second code set in the link provided, I utilized the first and it worked beautifully. With some additions to the code to account for other filters/criteria, I have the results I need.
SELECT T1.mrID, T1.mrSEQUENCE, T1.mrUSERID, T1.mrFIELDNAME, T1.mrNEWFIELDVALUE, T1.mrOLDFIELDVALUE, T1.mrTIMESTAMP, MIN(T2.mrTIMESTAMP) AS mrNextTIMESTAMP, DATEDIFF("s", T1.mrTIMESTAMP, MIN(T2.mrTIMESTAMP)) AS TimeInStatus
FROM ((dbo_MASTER3_FIELDHISTORY AS T1 LEFT JOIN dbo_MASTER3_FIELDHISTORY AS T2 ON (T2.mrTIMESTAMP > T1.mrTIMESTAMP) AND (T1.mrID = T2.mrID)) INNER JOIN dbo_MASTER3 AS T4 ON (T4.mrID = T1.mrID))
WHERE T4.mrSUBMITDATE >= #1/1/2018#
AND t1.mrFIELDNAME = "mrSTATUS"
AND NOT T4.mrSTATUS="_Deleted_"
AND NOT T4.mrSTATUS="_SOLVED_"
AND NOT T4.mrSTATUS="_PENDING_SOLUTION_"
GROUP BY T1.mrID, T1.mrSEQUENCE, T1.mrUSERID, T1.mrFIELDNAME, T1.mrNEWFIELDVALUE, T1.mrOLDFIELDVALUE, T1.mrTIMESTAMP
ORDER BY T1.mrID, T1.mrTIMESTAMP;
Sincerely,
Kristopher
Need list of "ALL" document numbers (k002) with their the most recent maintenance date (lm01_s) and status_code. The code below finds last date from the entire table and any record with that date. This is not what I need. There is only one table. If I drop the status_code from the equation, this is easy.
SELECT k002, lm01_s, status_code
FROM stat_trans
WHERE (lm01_s = ANY (SELECT MAX(lm01_s) FROM stat_trans)) ORDER BY lm01_s;
I have also tried this ...
SELECT k002, lm01_s, advice_code
FROM romis_stat_trans
WHERE lm01_s IN (((SELECT Max(lm01_s) FROM romis_stat_trans GROUP BY k002)));
I have tried so many things that I forget what I have tried. Everything has been a dead end.
Use a subquery in the where clause to return only the records where lm01_s is equal to the max lm01_s. I found it's important to use a table alias or else Access will confuse the fields.
select k002,
lm01_s,
status_code
from stat_trans
where lm01_s=(select max(sc.lm01_s)
from stat_trans as sc
where sc.k002 = stat_trans.k002)
I have an Access Database which links into Excel for a college database project. The goal is to fix incorrect/incomplete data before importation through the use of Update/SQL queries. There is one item in particular which is a field containing the order status. If an order is complete = Complete, if an order is missing a few parts = Backorder and nothing at all = Open. The issue I have is there is multiple parts on one PO ID# which makes it difficult to determine if an order is on backorder as 2/5 parts may be complete while 3/5 may be on backorder. Any ideas on how I can force access to automatically set a default order status or is this a long sql query?
Thanks
With SQL you can return a query to find the order status, using a CASE statement. I'm not sure of the table/column names in the parent table you have but you can probably tweak it from here (I'm just assuming identity columns):
SELECT P.Id, P.Name, "Status" =
CASE
WHEN R.QuantityReceived < I.QuantityOrdered THEN 'Backorder'
WHEN R.QuantityReceived = I.QuantityOrdered THEN 'Complete'
WHEN R.QuantityReceived > I.QuantityOrdered THEN 'Open'
END
FROM PurchaseOrders P INNER JOIN POItem I on P.PurchaseOrderId = I.PurchaseOrderId
INNER JOIN POReceipt R on I.ItemId = R.ItemId
So first you need to join your tables to get the related records (this is also assuming that there is only one of each), then use a CASE statement to return the value you are looking for based on a comparison between fields.
I've got the code below which displays the location_id and total number of antisocial crimes but I would like to get the location_name from a different table called location_dim be output as well. I tried to find a way to UNION it but couldn't get it to work. Any ideas?
SELECT fk5_location_id , COUNT(fk3_crime_id) as TOTAL_ANTISOCIAL_CRIMES
from CRIME_FACT
WHERE fk1_time_id = 3 AND fk3_crime_id = 1
GROUP BY fk5_location_id;
You want to use join to lookup the location name. The query would probably look like this:
SELECT ld.location_name, COUNT(cf.fk3_crime_id) as TOTAL_ANTISOCIAL_CRIMES
from CRIME_FACT cf join
LOCATION_DIM ld
on cf.fk5_location_id = ld.location_id
WHERE cf.fk1_time_id = 3 AND cf.fk3_crime_id = 1
GROUP BY ld.location_name;
You need to put in the right column names for ld.location_name and ld.location_id.
you need to find a relationship between the two tables to link a location to crime. that way you could use a "join" and select the fields from each table you are interested in.
I suggest taking a step back and reading up on the fundamentals of relational databases. There are many good books out there which is the perfect place to start.
We have a database that stores vehicle's gps position, date, time, vehicle identification, lat, long, speed, etc., every minute.
The following select pulls each vehicle position and info, but the problem is that returns the first record, and I need the last record (current position), based on date (datagps.Fecha) and time (datagps.Hora). This is the select:
SELECT configgps.Fichagps,
datacar.Ficha,
groups.Nombre,
datagps.Hora,
datagps.Fecha,
datagps.Velocidad,
datagps.Status,
datagps.Calleune,
datagps.Calletowo,
datagps.Temp,
datagps.Longitud,
datagps.Latitud,
datagps.Evento,
datagps.Direccion,
datagps.Provincia
FROM asigvehiculos
INNER JOIN datacar ON (asigvehiculos.Iddatacar = datacar.Id)
INNER JOIN configgps ON (datacar.Configgps = configgps.Id)
INNER JOIN clientdata ON (asigvehiculos.Idgroup = clientdata.group)
INNER JOIN groups ON (clientdata.group = groups.Id)
INNER JOIN datagps ON (configgps.Fichagps = datagps.Fichagps)
Group by Fichagps;
I need same result I'm getting, but instead of the older record I need the most recent
(LAST datagps.Fecha / datagps.Hora).
How can I accomplish this?
Add ORDER BY datagps.Fecha DESC, datagps.Hora DESC LIMIT 1 to your query.
I'm not sure why you are having any problems with this as Lex's answers seem good.
I would start putting ORDER BY's in your query so it puts them in an order, when it's showing the record you want as the first one in the list, then add the LIMIT.
If you want the most recent, then the following should be good enough:
ORDER BY datagps.Fecha DESC, datagps.Hora DESC
If you simply want the record that was added to the database most recently (irregardless of the date/time fields), then you could (assuming you have an auto-incremental primary key in the datagps table (I assume it's called dataID for this example)):
ORDER BY datagps.dataID DESC
If these aren't showing the data you want - then there is something missing from your example (maybe data-types aren't DATETIME fields? - if not - then maybe a CONVERT to change them from their current type before ORDERing BY would be a good idea)
EDIT:
I've seen the screenshot and I'm confused as to what the issue is still. That appears to be showing everything in order. Are you implying that there are many more than 5 records? How many are you expecting?
Do you mean: for each record returned, you want the one row from the table datagps with the latest date and time attached to the result? If so, how about this:
# To show how the query will be executed
# comment to return actual results
EXPLAIN
SELECT
configgps.Fichagps, datacar.Ficha, groups.Nombre, datagps.Hora, datagps.Fecha,
datagps.Velocidad, datagps.Status, datagps.Calleune, datagps.Calletowo,
datagps.Temp, datagps.Longitud, datagps.Latitud, datagps.Evento,
datagps.Direccion, datagps.Provincia
FROM asigvehiculos
INNER JOIN datacar ON (asigvehiculos.Iddatacar = datacar.Id)
INNER JOIN configgps ON (datacar.Configgps = configgps.Id)
INNER JOIN clientdata ON (asigvehiculos.Idgroup = clientdata.group)
INNER JOIN groups ON (clientdata.group = groups.Id)
INNER JOIN datagps ON (configgps.Fichagps = datagps.Fichagps)
########### Add this section
LEFT JOIN datagps b ON (
configgps.Fichagps = b.Fichagps
# wrong condition
#AND datagps.Hora < b.Hora
#AND datagps.Fecha < b.Fecha)
# might prevent indexes to be used
AND (datagps.Fecha < b.Fecha OR (datagps.Fecha = b.Fecha AND datagps.Hora < b.Hora))
WHERE b.Fichagps IS NULL
###########
Group by configgps.Fichagps;
Similar question here only that that one uses outer joins.
Edit (again):
The conditions are wrong so corrected it. Can you show us the output of the above EXPLAIN query so we can pinpoint where the bottle neck is?
As hurikhan77 said, it will be better if you could convert both of the the columns into a single datetime field - though I'm guessing this would not be possible for your case (since your database is already being used?)
Though if you can convert it, the condition (on the join) would become:
AND datagps.FechaHora < b.FechaHora
After that, add an index for datagps.FechaHora and the query would be fast(er).
What you probably want is getting the maximum of (Fecha,Hora) per grouped dataset? This is a little complicated to accomplish with your column types. You should combine Fecha and Hora into one column of type DATETIME. Then it's easy to just SELECT MAX(FechaHora) ... GROUP BY Fichagps.
It could have helped if you posted your table structure to understand the problem.