Best Records From Multiple Table Aggregate Problem
Oct 29, 2007
I have struggled and can't seem to get the SQL correct to get the records I want.
I have 2 tables containing information from 2 separate independant sensor arrays which collect data about trains in a rail network. I need to get the most current records about the trains at any given time.
For any given moment in time, I want to query the database and get the last known position of each train and it's status.
So I want a result table like this:
given time = 10:07:20
TrainId | PosTime | X | Y | StatusTime | SensorId | Delay | OffDuty
109 | 5/10/2007 10:07:15 | 62389 | 25002 | 5/10/2007 10:06:51 | 75 | -5 | N
210 | 5/10/2007 10:07:15 | 65489 | 25432 | 5/10/2007 10:04:54 | 85 | -10 | Y
857 | 5/10/2007 10:07:15 | 62889 | 25983 | 5/10/2007 10:05:21 | 231 | +1 | N
OR given time=10:03:30
1 | 109 | 5/10/2007 10:03:30 | someX | someY | 5/10/2007 10:02:34 | 72 | -3 | N
2 | 210 | 5/10/2007 10:03:30 | someX | someY | null | null | null | null
(Since train 210 it hasn't tripped a status sensor yet, we don't know it's status at that time)
3 | 857 | 5/10/2007 10:03:30 | someX | someY | 5/10/2007 10:02:48 | 199 | +2 | N
Any help to achieve these results would be MOST appreciated, Thanks.
Hi AllI need to aggregate a query to produce the following:Workplace AvgM100 4.7M120 3.45Which would be a normal aggregate:SELECT Workplace, Avg(VALUE)FROM PRODGROUP BY WorkplaceHowever I need the average to only be based on the most recent 20results from each of the Workplace groups.I've never had to do something like this before so can't think of anyway to only take off the most recent 20 for each group (ordered byDate). It doesn't really matter if there were 25 spread across 2 daysI would just cut the list at 20 VALUEs as there is no time componentinvloved.Is there any way to do a sub-query that uses select top 20 ... foreach group that could then be aggregated?I would prefer to do it through a select statement rather than havingto use a stored procedure using and variables, etc which I can do. Thetable is not huge but is growing rapidly so I'm concerned thatanything using dyamic SQL or similar would be become painfully as thenumber of groups grows to 5,000 or more.If anyone has any ideas they would be greatly appreciated.Thanks in advance,Bevan
Hello, i have a table called tblschedule that has field for resourceID, employeeID, and scheduleDate. And also i have another table called tblResource that has resourceID and ResourceName. The third table called tblEmployee has employeeID, employeeFirstName and employeeLastname. I want to get a report for each resourceName (not ResourceID) that per employee schedule (COUNT). I need the report has ResourceName field, employeeName field and count. How can i write a store procedure as it need join three table to get the count. Thank you very much!
Hi everyone. I am updating a table with aggregate results for multiplecolumns. Below is an example of how I approached this. It works finebut is pretty slow. Anyone have an idea how to increase performance.Thanks for any help.UPDATE #MyTableSET HireDate=(Select Min(Case When Code = 'OHDATE' then DateChangedelse null end)From HREHWhere #MyTable.HRCo=HREH.HRCo and#MyTable.HRRef=HREH.HRRef ),TerminationDate=(select Max(Case When Type = 'N' thenDateChanged else null end)From HREHWhere #MyTable.HRCo=HREH.HRCo and#MyTable.HRRef=HREH.HRRef ),ReHireDate=(select MAX(Case When Code = 'HIRE' thenDateChanged else null end)From HREHWhere #MyTable.HRCo=HREH.HRCo and #MyTable.HRRef=HREH.HRRef )
Can we push the data for the above query in a physical table and create index to make the query fast rather than using the same set tables multiple times
insert into table1 (colname) values (value1) can only insert one record into the table. How to insert multiple records as value1, value2, value3... into a table? We can of course use the above repeatedly, but if I don't know how many records (which is a variable), and I want to write a code which just take value1, value2, value3 .... from the clipboard, to paste as a input. How to insert those multiple records into table without split it. Thanks
Hi.. I really need a help. Is there any way to insert multiple records into a table in one go?
I have a table named Fruit. It contains FruitId,OwnerId,Colour
The list of colour is got from another table name FruitColour. FruitColour Consists of 2 column, FruitName and Colour.
Is it possible to insert multiple records into Fruit table with one query if only the colour is changed.
Sample case I have an Apple. Fruit id=2 OwnerId=2 Colour -- > Select Colour From FruitColour where FruitName='Apple' (Will return multiple records)
I tried to insert using this query: Insert into Fruit(FruitId,OwnerId,Colour) Values (2,2,Select Colour from FruitColour where FruitName='Apple').
Gives me this error Subqueries are not allowed in this context. Only scalar expressions are allowed.
I need to do this because actually I am inserting multiple fruit at one time, and each have multiple colour. If I need to insert the colour one by one for each fruit it will takes a very long time.
Any suggestion are welcomed. Thank you in advanced.
I am building an invoicing database. I have no problems searching fordue dates and generating the invoice header. The problem is generatingthe invoice detail.My customers may have more than one item that needs to go into theinvoice detail table.For example:customer #123 has 2 items that need to be placed into the detailtable.Rate 1 email accountRate 2 hosting accountI have to get both of these records into the detail table.When using the conventional method, I get something alongthe lines of" insert failed. more than one record was returned"-------INSERT INTO detailSELECT (SELECT max([id])FROM iheader),CustomerRates.custid,rates.Price, rates.nameFROM CustomerRates INNER JOIN Rates ON CustomerRates.Rateid = rates.IDWHERE NextBill > GETDATE()-------I have even considered a cursor to loop through the records but I cantmake it run properly. I am not crazy about the performance of cursorsanyway.Any aideas would be greatly apreciated.
writing the query for the following, I need to collapse the continuity. If the termdate for an ID is one day less than the effdate of the next id (for the same ID) i need to collapse the records. See below example .....how should i write the query which will give me the desired output. i.e., get min(effdate) and max(termdate) if termdate is one day less than the effdate of next record.
hello, I am new to Slq 2000 Database,Now I create an asp.net application with sql 2000, in my database I have two 2 table lets' say "OrderHead" and "OrderDetail",they look like this: OrderHead orderdetail ---order no ----orderno ---issuedate ----itemname ---supplier ----desccription ---amount -----price ----Qty Now I created a user-defined Collection class to storage order detail data in memory and bind to a datagrid control. I can transfer Collection data to xml file ,my problem as below : There have multiple records data in my xml file,and I want to send the xml file as argument to a store procedure in sql 2000
anyone can give me some advise or some sample code ?
Now I want the records having flag2=1 only.. I.e ID=3 has flag2=1 where as ID = 1 and 2 has flag1 and flag3 =1 along with flag2=1. I don't want ID=1 and 2.
I can't make ID unique or primary. I tried with case when statements but it I am somehow missing the basic logic.
I'm trying to update a checkbox from "False" to "True" within a single table for multiple records. I can update a single record using the script below. However, I'm having trouble applying additional Id's to the string.
(Works) - Update Name_Demo set KEY_CONTACT = 'true' where ID = 225249
(doesn't work) - Update Name_Demo set KEY_CONTACT = 'true' where ID = '225249, 210014, 216543'
It says query executes successfully but returned no rows.
I'm new to MS SQL and VB. I have a table with one field JOB_NAME containing 20 records. Out of that field I want to retrieve 6 of the 20 records into a pulldown menu. They are all unique text names like so:
Anna Smith John Doe
etc. I did not see IDs listed for any of the names in the table when I looked.
There is no common denominator to the names that can be filtered in the SELECT statement, and the 6 that I want will need to be pulled out individually.
Is there a way to do this with a SELECT statement? I have not found much information about how to extract unique records out of a single field. Here's the statement I'm using which pulls all of them:
strSQL = "SELECT DISTINCT JOB_NAME AS Names FROM [WORKER_NAMES] WHERE JOB_NAME<>' ' ORDER BY JOB_NAME ASC"
This gives me the total list but I only want to bring back 6 of the 20 for the pulldown.
Is there a way to modify this statement to pull only the records that I want?
I need to update the ilocationid from Table 1 to all Table 2 records related to Table 1but there is no direct relation from Table 1 to Table 2. I needed Table 3 to make the connection from Table 1 to 2.
I want to update sum of a field from another table to first table
TABLE ONE: ========== ItemID QtyInStock
Table TWO: ========== BatchID ItemID Qty
I want to Update the QtyInStock of First Table with Sum(Batch.Qty)
here is the query i am writing but giving error
UPDATE ITEMS SET INSTOCKQTY=CASE WHEN QtyInBatch>1 THEN QTYINBATCH ELSE 0 END FROM ITEMS, ( SELECT ITEMS.ITEMID, SUM(Batch.Qty) AS QtyInBatch FROM Batch INNER JOIN Items ON Batch.ItemID = Items.ItemID GROUP BY ITEMS.ITEMID )
appericiating anyones help in advance
FAZEEL AMJAD Systems Engineer Crystal Technologies
I have a problem where I have 2 compare 2 records from the same table. This part looks easy but the problem is for a User there can be multiple records and I have 2 compare each record with its previous instance based on the timestamp. Not only I have to compare I have to perform some analysis. Below is the Table script and sample output.
Givens: All SQL Server 2008 or 2012 tools at your disposal.
Production database contains the following tables (simplified for example: constraints ignored, etc.) associated with a racing video game’s server.
-- A player of our game
-- Table greater than 10 million rows
CREATE TABLE [dbo].[User] ( [UserId] [bigint] NOT NULL ,[country] [int] NULL -- User’s home country ,[name] [nvarchar](15) NULL -- User’s displayable name (‘John’, ‘Bill’) ,[subscriptionTier] [int] NULL ) -- 0 == free, 1 == paid, for instance
Assume that rows get written into the event tables at a rate of 1,000 a minute,are never updated once written and currently are only read on a replica/reporting server.
Question Background: Write up a single query that would return the following: List of users and whose “TotalMoneyEarned” value ever grew (between logon events) at a rate of more than 1,000 per minute (we’d consider these suspicious and flag them for later investigation).
For instance, if the sample data were:
-- example of [Events.UserLogon] data -- not the query output we want
Event 1 is okay because there’s nothing to compare it against
Event 2 is okay because the TotalMoneyEarned only grew 500 in a minute
Event 3 should be flagged, as the value grew 1500 in a minute
Event 4 is okay, as it grew 7,000 in 8 minutes (< 1000 per minute)
Query Output (your query should return data in a format like this):
User Flagged Logon Time Rate Since Last Logon (money/minute) John 2010-10-16 00:21:56 1500 Dave 2010-10-16 00:30:50 3200 Bill 2010-10-16 00:35:23 1000
It is likely that you will need to create sample data for both the User and [Events.Logon] tables. We are looking for a single query that returns data like what is represented in Query Output.
Table A has columns CompressedProduct, Tool, Operation
Table B in a differnt database has columns ID, Product, Tool Operation
I cannot edit table A. I can select records from A and insert into B. And I can select only the records that are in both tables.
But I want to be able to select any records that are in table A but not in Table B.
ie. I want to select records from A where the combination of Product, Tool and Operaton does not appear in Table B, even if all 3 on their own do appear.
This code return all the records from A. I need to filter out the records found in Table B.
SELECT ID, CompressedProduct, oq.Tool, oq.Operation FROM OPENQUERY (Lisa_Link, 'SELECT DISTINCT CompressedProduct, Tool, Operation FROM tblToolStatus ts JOIN tblProduct p ON ts.ProductID = p.ProductID JOIN tblTool t ON ts.ToolID = t.ToolID JOIN tblOperation o ON ts.OperationID = o.OperationID WHERE ts.ToolID=66 ') oq LEFT JOIN Family f on oq.CompressedProduct = f.Product and oq.Tool = f.Tool and oq.Operation = f.Operation
In the ECASE table there is trigger to get the max value of case_id column in ecase based on project and increment one to that case_id value and insert into ecase table .
When we insert a new record to the ECASE table this trigger calls and insert the case_id column value.
When i run with multiple threads , the transaction is rolled back because of trigger . The reason is , on the project table the lock is happening while getting the max value of case_id column based on project.
Hi, need help in this statement here. I have three tables here, i.e. Sales, SalesItem, & SalesPmt. I want to display a grid that shows the Total Bill and Total Payment amounts. My try is like this: SELECT SalesNo, SUM(Price*Qty) AS TotalBill, SUM(Payment) AS TotalPayment FROM ... GROUP BY.... No syntax error or whatever found, but the result of the total amounts is incorrect. Say the data of the respective table below: SalesItem
No Qty Price
1 1 5.00
2 2 12.00
3 4 3.50 SalesPayment
No Amount
1 10.00
2 5.00 But the result I get from the above query is:
TotalBill TotalPayment
86.00 45.00 Total Bill should be 43.00 and Total Payment should be 15.00. Apparently the problem is due to the fact that I and querying on multiple tables. The correct total payment amount was multiplied by the number of rows of sales items (15.00 x 3), while the correct total bill amount was multiplied by the number of rows of sale payments (43.00 x 2). So, what is the better way of writing this query?
I have several tables that I need to summarize data from two tables based upon a dates passed in and group that data. I have attached my table layout, some sample data, and how I would like the results to look.
I'm having trouble using Aggregate functions with multiple fields. Here is what I'm trying to do:
SELECT REPLACE(Cust_Key, sum(PRODUCT_CHARGE), count(Tracking_Number), Tracking_Number FROM Shipments = '2008-05-05' Group By Cust_Key, Tracking_Number
I can get this to work when I use Group By for a single field like Cust_Key but I don't know how to make it work for multiple fields. What is the best way to write something that contains a few aggregate functions on top of multiple fields?
Howdy,I need to write an update query with multiple aggregate functions.Here is an example:UPDATE tSETt.a = ( select avg(f.q) from dbo.foo f where f.p = t.y ),t.b = ( select sum(f.q) from dbo.foo f where f.p = t.y )FROM dbo.test tBasically I need to get some aggregate statistics about the rows offoo and store them in rows of t. The above statement works fine...butnote how the two subSelect's have the exact same WHERE clause. Thisscreams at me to combine them...but how? I would like to havesomething like this in my query:SELECT avg(f.q), sum(f.q) FROM dbo.foo f WHERE f.p = 2...and somehow store the results in t.a and t.b. Is there any way todo this?Thanks before hand!
