Deleting Old Records Is Blocking Updating Latest Records On Highly Transactional Table
Mar 18, 2014
I have a situation where deleting old records is blocking updating latest records on highly transactional table and getting timeout errors from application.
In details, I have one table called Tran_table1 in OLTP database. This Tran_table1 is highly transactional table, it will receive data for insert/update continuously
While archiving 2 years old records from Tran_table1 into Tran_table1_archive in batches(using DELETE OUTPUT INTO clause), if there is any UPDATEs on Tran_table1,these updates are getting blocked and result is timeout errors in application.
Is there any SQL Server hints to avoid blocking ..
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Mar 17, 2015
I have a table where i am inserting into temp table, I mean selecting the records from existing table. From this how can i get latest records.
create table studentmarks
(
id int,
name varchar(20),
marks int
)
Insert into dbo.studentmarks values(1,'sha',20);
[Code] ....
How to write a sql query to get the below output
studentname totalmarks
sha 90
hu 120
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Dec 2, 2007
Hi, i need the suggestion here in very familiar db situation ..i have a main table and a primary key of that table is used in many other table as foreign key.If i am deleting a record in a main table,how do i make sure that all the corresponding record in the associated tables,where that foreign key is used, gets deleted too?What are my options?Thanks
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Jul 6, 2006
I loaded one table via SSIS and found that it contained many duplicate records (from the input source). I can create a SQL task to delete them, but I wonder if SSIS offers and task "out of the box" to delete dups?
TAI,
barkingdog
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Aug 24, 2015
I'm trying to delete some records from some tables in a SQL Server 2008 R2 database. There's a foreign key relationship between the two tables. To make things easier here's the definition of both tables:
-- Parent table
CREATE TABLE [dbo].[PharmInvInItemPackages](
[InventoryInDetailID] [int] IDENTITY(1,1) NOT NULL,
[InventoryInID] [int] NOT NULL,
[ItemPackageID] [int] NOT NULL,
[code]....
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Sep 24, 2015
I have one table having three columns.This table contains lot of repeated records. I want to delete this records .
In this below example i want to delete all the records which columns id and no columns contains same values.
id no sequence
------------------------------------
35 35432 1
35 35432 2
35 35432 3
36 35432 1
35 45623 1
First three records the columns id and no contains same value. I want to delete this three records.
But in last record for id =35 and no column =45623.it is not repeated so it should not be deleted.
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Jan 27, 2006
Is there a way to delete records from table passing parameter as tablename? I won't to delete all records from a table dependent on table selected. i'm trying to do this with stored procedure...Table to delete depends on the checkbox selected.
Current code(works)
Public Function DelAll()
MZKDB = MZKHRFin
If sloption = "L" Then
sqlConn.ConnectionString = "Server=" & MZKSrv & ";Initial Catalog=" & MZKDB & ";Integrated Security=SSPI;"
ElseIf sloption = "S" Then
sqlConn.ConnectionString = "Server=" & MZKSrv & ";User id=sa;Password=" & MZKPswd & "; Initial Catalog=" & MZKDB & ";"
End If
sqlConn.Open()
sqlTrans = sqlConn.BeginTransaction()
sqlCmd.Connection = sqlConn
sqlCmd.Transaction = sqlTrans
Try
sqlCmd.CommandText = sqlStr
sqlCmd.ExecuteNonQuery()
sqlTrans.Commit()
frm2.txtResult.Text = frm2.txtResult.Text & " " & TableName & " Prior records have been deleted from the database." & vbCrLf
SetCursor()
Catch e As Exception
Try
sqlTrans.Rollback()
Catch ex As SqlException
If Not sqlTrans.Connection Is Nothing Then
frm2.txtResult.Text = frm2.txtResult.Text & " " & TableName & " An exception of type " & ex.GetType().ToString() & " was encountered while attempting to roll back the transaction." & vbCrLf
SetCursor()
End If
End Try
frm2.txtResult.Text = frm2.txtResult.Text & " " & TableName & " Records were NOT deleted from the database." & vbCrLf
SetCursor()
Finally
sqlConn.Close()
End Try
ResetID()
End Function
If cbGenFY.Checked Then
sqlStr = "DELETE FROM FIN_FiscalYear"
TableName = "dbo.FIN_FiscalYear"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenFY()
timeStepStop = Date.Now
DispOneCounts()
End If
If cbGenFund.Checked Then
sqlStr = "DELETE FROM FIN_Fund"
TableName = "dbo.FIN_Fund"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenFund()
timeStepStop = Date.Now
DispOneCounts()
End If
If cbGenFunc.Checked Then
sqlStr = "DELETE FROM FIN_Function"
TableName = "dbo.FIN_Function"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenFunc()
timeStepStop = Date.Now
DispOneCounts()
End If
If cbGenObject.Checked Then
sqlStr = "DELETE FROM FIN_Object"
TableName = "dbo.FIN_Object"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenObject()
timeStepStop = Date.Now
DispOneCounts()
End If
If cbGenCenter.Checked Then
sqlStr = "DELETE FROM FIN_Center"
TableName = "dbo.FIN_Center"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenCenter()
timeStepStop = Date.Now
DispOneCounts()
End If
If cbGenProject.Checked Then
sqlStr = "DELETE FROM FIN_CodeBook"
TableName = "dbo.FIN_CodeBook"
DelAll()
sqlStr = "DELETE FROM FIN_BudgetAccnt"
TableName = "dbo.FIN_BudgetAccnt"
DelAll()
sqlStr = "DELETE FROM FIN_Budget"
TableName = "dbo.FIN_Budget"
DelAll()
sqlStr = "DELETE FROM FIN_Project"
TableName = "dbo.FIN_Project"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenProject()
timeStepStop = Date.Now
TableName = "dbo.FIN_Project"
DispOneCounts()
End If
If cbGenProgram.Checked Then
sqlStr = "DELETE FROM FIN_Program"
TableName = "dbo.FIN_Program"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenProgram()
timeStepStop = Date.Now
DispOneCounts()
End If
If cbGenGL.Checked Then
sqlStr = "DELETE FROM FIN_gl"
TableName = "FIN_gl"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenGL()
timeStepStop = Date.Now
DispOneCounts()
End If
If cbGenRevenue.Checked Then
sqlStr = "DELETE FROM FIN_Revenue"
TableName = "FIN_Revenue"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenRevenue()
timeStepStop = Date.Now
DispOneCounts()
End If
If cbGenBank.Checked Then
sqlStr = "DELETE FROM FIN_VendorBankAccnt"
TableName = "dbo.FIN_VendorBankAccnt"
DelAll()
sqlStr = "DELETE FROM FIN_VendorBank"
TableName = "dbo.FIN_VendorBank"
DelAll()
sqlStr = "DELETE FROM FIN_bankAdd"
TableName = "dbo.FIN_bankAdd"
DelAll()
sqlStr = "DELETE FROM FIN_bankTERMS"
TableName = "dbo.FIN_bankTerms"
DelAll()
sqlStr = "DELETE FROM FIN_bank"
TableName = "dbo.FIN_bank"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenBank()
timeStepStop = Date.Now
TableName2 = "dbo.FIN_bankTERMS"
TableName3 = "dbo.FIN_BankAdd"
TableName4 = "dbo.FIN_VendorBank"
TableName5 = "dbo.FIN_VendorBankAccnt"
DispTwoCounts()
End If
If cbFinAP.Checked Then
sqlStr = "DELETE FROM FIN_Period"
TableName = "FIN_Period"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenPeriod()
timeStepStop = Date.Now
DispOneCounts()
End If
If cbFinVM.Checked Then
sqlStr = "DELETE FROM FIN_vendorClass"
TableName = "FIN_vendorClass"
DelAll()
sqlStr = "DELETE FROM FIN_vendorAdd"
TableName = "FIN_vendorAdd"
DelAll()
sqlStr = "DELETE FROM FIN_vendor"
TableName = "FIN_vendor"
DelAll()
sqlStr = "DELETE FROM FIN_AddressType"
TableName = "FIN_AddressType"
DelAll()
sqlStr = "DELETE FROM FIN_VendorStatus"
TableName = "FIN_VendorStatus"
DelAll()
sqlStr = "DELETE FROM States"
TableName = "States"
DelAll()
sqlStr = "DELETE FROM Country"
TableName = "Country"
sqlStr = "DELETE FROM FIN_IndustrialCodes"
TableName = "FIN_IndustrialCodes"
DelAll()
ClearCounts()
timeStepStart = Date.Now
GenIndCodes()
timeStepStop = Date.Now
DispOneCounts()
DelAll()
ClearCounts()
timeStepStart = Date.Now
FinVendStat()
timeStepStop = Date.Now
TableName = "FIN_VendorStatus"
DispOneCounts()
ClearCounts()
timeStepStart = Date.Now
FinAddrType()
timeStepStop = Date.Now
TableName = "FIN_AddressType"
DispOneCounts()
ClearCounts()
timeStepStart = Date.Now
GenCountry()
timeStepStop = Date.Now
TableName = "Country"
DispOneCounts()
ClearCounts()
timeStepStart = Date.Now
GenState()
timeStepStop = Date.Now
TableName = "States"
DispOneCounts()
ClearCounts()
timeStepStart = Date.Now
FinVM()
timeStepStop = Date.Now
TableName = "FIN_Vendor"
TableName2 = "FIN_VendorAdd"
DispTwoCounts()
End If
If cbFinbudget.Checked Then
sqlStr = "DELETE FROM FIN_BudgetAccnt"
TableName = "FIN_BudgetAccnt"
DelAll()
sqlStr = "DELETE FROM FIN_Budget"
TableName = "FIN_Budget"
DelAll()
sqlStr = "DELETE FROM FIN_CodeBook"
TableName = "FIN_CodeBook"
DelAll()
ClearCounts()
TableName = "FIN_Budget"
timeStepStart = Date.Now
FinBudget()
timeStepStop = Date.Now
DispOneCounts()
ClearCounts()
TableName = "FIN_Codebook"
TableName2 = "FIN_budgetAccnt"
timeStepStart = Date.Now
FinCodeBook()
timeStepStop = Date.Now
DispTwoCounts()
ClearCounts()
End If
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Sep 11, 2007
Hi,
I have a query that is executing properly but i want to delete the results of the query. I am trying to do it but i am messing up somewhere in the syntax
Can anybody help me out with this problem?
Below is the query
DELETE FROM DPT_NEW_BINS WHERE(
Select BIN,LEFT(ACCT_NUM_MIN,16), LEFT(ACCT_NUM_MAX,16), ISO_CTRY_CD, REGN_CD ,PROD_TYPE_CD FROM DPT_NEW_BINS o
WHERE EXISTS (SELECT BIN,LEFT(ACCT_NUM_MIN,16), LEFT(ACCT_NUM_MAX,16), ISO_CTRY_CD, REGN_CD ,PROD_TYPE_CD FROM DPT_temp_NEW_BINS i
WHERE o.ACCT_NUM_MIN = i.ACCT_NUM_MIN AND o.ACCT_NUM_MAX = i.ACCT_NUM_MAX))
CAN SOMEBODY POINT OUT MY MISTAKE?
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May 24, 2007
No transaction log involved, only the table itself.
Use sp_spaceused "table_name" to check the space used.
It seems the table size actually increased from the beginning to the middle of deletion, at the end of deletion, its size decreased.
Recovery mode set to be simple, autoshrink turned on.
The tables tested are about 50MB ~ several GB in size, all have the same behavior. The size increased about 5%~10%.
Since the deletion is called from another software, I want to know if it is possible for SQL Server to have this behavior or it is absolutely the 3rd party software's issue
Thanks!
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Sep 13, 2007
Hi i am getting a weekly transaction file which has two columns trans code and trans date to indicate whether the record is changed, added or modified . and the monthly master file contains blank in these two fields.
How do i update the row coming from the transaction file in the tables which contain the rows from the master file .
to better explain the example is
Master File
ID Name AGE Salary Transcode TransDate
2 dev 27 2777
Transaction File indicating change
ID Name AGE Salary Transcode TransDate
2 dev 27 24444 C 08072007
the ouput should be
2 dev 27 24444 C 08072007
replacing the existing row in the table(updating the whole row)
i have 50 columns in my table and based on the two fields i should replace the rows exisiting in table and if ID doesnot match exist just add them as a new row.
what transformation should i use .... to replace all the columns which have matching ID in table to the current record from trans file and if there doesnt exist matching id just add them as new row.
Thanks...
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Aug 5, 2015
I have many large tables with millions of records in a SQL Server database. They all use an Identity column which is the clustered index. We haven't been deleting any records until recently because disk space is now becoming a problem.
Assuming I delete a lot of old records, I'm thinking that the freed up space in the data pages won't be reused. New records will be added at the end of the table because of the Identity column being the clustered index. So the table will keep getting bigger even though there is lots of free space.
Assuming I'm right, then how do I recapture this unused space? Is an alter table rebuild the best way? Or rebuilding the clustered index?
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Jun 9, 2005
I'm having a bit of problem putting together a query that will update records in one table from another table. I've got 2 tables lets call them tblA and tblB.In tblA there is EID(int), QID(int), OID(int) and in tblB OID(int) and QID(int). Also there is an input parameter @EID.What I want to have happen is when someone inputs @EID then tblB gets updated from tblA. To give you a heads up there are no PKs or FKs in either of the tables.If there is an OID in tblA it takes the QID from tblA and places it in tblB where OID from tblA and tblB match.Hopefully this makes sense I thought that I could do something like this:CREATE PROCEDURE test3(@EID int)AS UPDATE tblUsedSET QuestionID = (select QuestionID from tblExamQuestions where ExamID = @EID)WHERE OrderID = (select OrderID from tblExamQuestions where ExamID = @EID)GOBut I get an error that says that there are to many records being returned by the subqueries. Winston
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Nov 29, 2006
Hi there!!
I have a table say Emp with index as (Empid) which is a autoincreament field.
How do I update names of already existing rows having identified Empid.
Complexity lies with the fact that I cannot use Emp table as Destination table because if i do so then it will insert new rows and empid will change.
Thanks and Regards
Rahul Kumar, Software Engineer
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Sep 3, 2014
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.
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Jun 20, 2007
I have a table with 35,000 records in it. I want to update a value in column A for only the first 5000 records, leaving the value in Column A for the remaining 30,000 records as it is now. What would be the command I would use to update Column A for the first 5000 records.
Thanks,
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Jul 21, 2015
I am trying to update a large table which consists of 45 million records , it is taking more than 2 days to the update , below is my approach
1. The table has only one clustered index and no other indexes on the table.
2. I am updating in batches say 20000 record-wise.
3. Changed the recovery mode to bulk logged and auto-growth size is set to 300MB and there is enough space in my disk for transaction log .
But still the query is running slowly.
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Jul 20, 2005
Hi,Currently we're a building a metadatadriven datawarehouse in SQLServer 2000. We're investigating the possibility of the updatingtables with enormeous number of updates and insert and the use ofcheckpoints (for simple recovery and Backup Log for full recovery).On several website people speak about full transaction log and thepace of growing can't keep up with the update. Therefore we want tocreate a script which flushes the dirty pages to the disk. It's notquite clear to me how it works. Questions we have is:* How does the process of updating, insert and deleting works with SQLServer 2000 with respect to log cache, log file, buffer cache, commit,checkpoint, etc?What happens when?* As far as i can see now: i'm thinking of creating chunks of data of1000 records with a checkpoint after the Query. SQL server has thedefault of implicit transactions and so it will not need a commit.Something like this?* How do i create chunks of 1000 records automatically withoutcreating a identity field or something. Is there something like SELECTNEXT 1000?Greetz,Hennie
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Apr 30, 2015
I am trying to multiple update records in Table B from a single record in Table A. To identify the records that need to be updated I used this:
Select
Table1.cfirstnameas'Table
1 First',Table1.clastnameas'Table
1 Last',Table1.ifamilyid,CR.icontactid,CR.lLiveswithStudent,
Table2.cfirstnameas'Table
2 First',Table2.cLastNameas'Table
2 Last',Table2.ilocationidas'Table
2 Location',Table1.iLocationIDas'Table
1 Location'
fromTable1
JoinTable3
CRonTable1.istudentid=CR.istudentid
JoinTable2
onCR.icontactid=Table2.iContactID
whereCR.lLivesWithStudent=1
andTable1.ifamilyid>0
andTable1.ilocationid<>Table2.iLocationIDandTable1.lCurrent=1
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.
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May 12, 2007
Hello, I am pretty new with SQL Server 2005.
I have installed SQL Server Express Edition. I have migrated a set of tables from Oracl10g (by using Microsoft's Migration Tool Kit).While I am trying the following simple update command, the session hangs and it never finishes !!!!!!!!!!!!
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
select pos_key from pos_station where staff_key = 1105
POS_KEY
=======
NULL
update pos_station set pos_key = 1 where staff_key = 1105
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
The table has a few constraints and a couple of indices in place.
Then I create another table (but no contraints or indices), just copy the data from the problematic one and the update WORKS (in msecs) :
update pos_station_new set pos_key = 1 where staff_key = 1105
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Is there any way to tell if the table (any table in SQL Server) is corrupted or not ?
How can I tell if a session is waiting for something and what is that something ?
Thank you very much for your help.
Tom
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Sep 21, 2007
Hello!
I have a table, where one of the columns is the date/timestamp of when each row was inserted. I want to be able to extract the most recently inserted rows.
With Sybase (a not so distant cousin of MS SQL) the following works:
select * from TABLE having date = max(date)
With MS SQL, however, the same query does not work:
Column 'TABLE.date' is invalid in the select list because it is not contained in an aggregate function and there is no GROUP BY clause.
What's the solution? Thanks!
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Dec 3, 2007
Let's say I have a data entry from a pool of employees:
table is as follow:
EmpNo Branch Date Amount
1 A101 11/30/2007 $0.90
1 A101 11/30/2007 $1.20
2 A101 11/30/2007 $0.90
3 A101 11/30/2007 $0.80
How can I select the whole table and only take in 1 unique latest entry if there are multiple entries for the same day, same branch under same employee number?
Thanks! :D
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Feb 13, 2008
Hi,
I hava a table with the following information
CREATE TABLE TEMP1 (REFID INT, REVISION INT, FIELDNAM VARCHAR(10), VALUE VARCHAR(10));
INSERT INTO TEMP1 VALUES(1001, 0, 'A', 'A2');
INSERT INTO TEMP1 VALUES(1001, 0, 'C', 'C2');
INSERT INTO TEMP1 VALUES(1001, 0, 'E', 'E2');
INSERT INTO TEMP1 VALUES(1002, 0, 'A', 'A3');
INSERT INTO TEMP1 VALUES(1002, 0, 'B', 'B2');
INSERT INTO TEMP1 VALUES(1002, 0, 'E', 'E3');
INSERT INTO TEMP1 VALUES(1001, 1, 'A', 'A4');
INSERT INTO TEMP1 VALUES(1001, 1, 'E', 'E4');
Here based on latest revision and refid I should get the fieldnam and value.
Expected output:
REFID FIELDNAM VALUE REVISION
1001 A A4 1
1001 E E4 1
1002 B B2 0
1001 C C2 0
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Dec 16, 2007
Hi all,
I have a question regarding SQL Server Performance and would be grateful for a tip. Let's say I have a DB with 50.000 records. These records belong to 1.000 different datasets, so there is 1 actual and 49 historical data records. For example a company with 1000 employees has a database where each year a new record is created for each employee so after 50 years they have 50.000 records (50 years x 1000 employees). 1 record is actual, and 49 are historical. What is the best way to store this? Main target is performance for the enduser, so when an employee clicks "See all my records" it should be fast. But on the other hand the application mainly works only with the current year. Additionally it should also be fast for the boss of business unit who wants to see the latest records of his e.g. 100 employees. I have some ideas and would like to get your opinion:
1. Retrieve by latest date
Just store the records. To get the current year just select the record with the latest year. Disadvantage might be with larger databases: If the company switches to store the requests per month, each user would have 600 records (12 months x 50 years). Each time the latest record should be retrieved, 600 recards have to be compared regarding the latest date (or sorted by date descending using Top1, but this might be a problem for the boss then? Or could this be combined for a group if the boss wants to see all the latest records of his employees?).
2. Add a 'IsCurrent'-Flag
Each time a new record is stored it should be compared to the latest record. If it is newer, the 'IsCurrent'-Flag should be removed and then checked on the new record. This should be fast processed (because on saving a new record it only needs to be checked against the currently 'IsCurrent'-flagged record), and for retrieving the current record no further comparison is necessary. But how could I do this? I need to update the "AddRecord"-SP with this comparison, but I don't know how to do this.
Currently number 2 is my favorite, I just don't know how to do it ;-) What is your opinion about it, and could you include an example?
Thanks
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Sep 13, 2006
Ok, I'm really new at this, but I am looking for a way to automatically insert new records into tables. I have one primary table with a primary key id that is automatically generated on insert and 3 other tables that have foreign keys pointing to the primary key. Is there a way to automatically create new records in the foreign tables that will have the new id? Would this be a job for a trigger, stored procedure? I admit I haven't studied up on those yet--I am learning things as I need them. Thanks.
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Aug 21, 2014
select
DayRank = ROW_NUMBER() OVER(ORDER BY a.datedel DESC),
a.order,a.line,a.datedel,a.recpt,b.status,
b.item,b.t_sup
from historytbl a
inner join order b
on a.order = b.order
and a.line = b.line
and a.status =4
group by a.order,line,a.datedel,a.recpt,b.status,b.item,b.sup
The query is returned the results below.
Rank OrderLineDateDelrecptitemsup
----- -------------------------------
1aaa102014-18-08rc1zzz1231122
2bbb202014-08-08rc2zzz1231122
3ccc302014-04-08rc3zzz1231122
4ddd902014-08-11rc6yyy123333
5eee102014-05-11rc7yyy123333
5fff90 2014-02-11rc8yyy123333
6ggg102014-05-10rc9qqq123444
7hhh502014-04-10rc0qqq123444
8iii102014-04-10rc5rrr123555
However, I want to have the query only show most recent two records for each group of item and sup, please see the results I want below.
Rank OrderLineDateDelrecptitemsup
----- -------------------------------
1aaa102014-18-08rc1zzz1231122
2bbb202014-08-08rc2zzz1231122
4ddd902014-08-11rc6yyy123333
5eee102014-05-11rc7yyy123333
6ggg102014-05-10rc9qqq123444
7hhh502014-04-10rc0qqq123444
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Jun 12, 2015
I have a requirement to delete 1 Million records from a table having 10 Million data and it's being queried on 24/7 basis (don't have a downtime). how can I achieve that?
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Aug 11, 2015
Table1 contains fields Groupid, UserName,Category, Dimension
Table2 contains fields Group, Name,Category, Dimension (Group and Name are not in Table1)
So basically I need to read the records in Table1 using Groupid and each time there is a Groupid then select records from Table2 where Table2.Category in (Select Catergory from Table1)
and Table2.Dimension in (Select Dimension from Table1)
In Table1 There might be 10 Groupid records all of which are different.
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Oct 21, 2015
I am trying to write a query that will retrieve all students of a particular class and also any rows in HomeworkLogLine if they exist (but return null if there is no row). I thought this should be a relatively simple LEFT join but I've tried every possible combination of joins but it's not working.
SELECT
Student.StudentSurname + ', ' + Student.StudentForename AS Fullname,
HomeworkLogLine.HomeworkLogLineTimestamp,
HomeworkLog.HomeworkLogDescription,
ROW_NUMBER() OVER (PARTITION BY HomeworkLogLine.HomeworkLogLineStudentID ORDER BY
[Code] ...
It's only returning two rows (the students where they have a row in the HomeworkLogLine table).
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Feb 26, 2014
I have a table T (a1, ..., an, time, id). I need to select those rows that have different id (GROUP BY id), and from each "id group" the row that has the latest field 'time'. Something like SELECT a1, ..., an, time, id ORDER BY time DESC GROUP BY id. This is the wrong syntax and I don't know how to handle this.
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Mar 20, 2014
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.
ID effdate termdate
556868 1999-01-01 1999-06-30
556868 1999-07-01 1999-10-31
556869 2002-10-01 2004-01-31
556872 1999-02-01 2000-08-31
556872 2000-11-01 2004-01-31
556872 2004-02-01 2004-02-29
output should be ......
ID effdate termdate
556868 1999-01-01 1999-10-31
556869 2002-10-01 2004-01-31
556872 1999-02-01 2000-08-31
556872 2000-11-01 2004-02-29
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Dec 3, 2014
I have a table with about half a million records, each representing a patient in my county.
Each record has a field (RRank) which basically sorts the patients as to how "unwell" they are according to a previously-applied algorithm. The most unwell patient has an RRank of 1, the next-most unwell has RRank=2 etc.
I have just deleted several hundred records (which relate to patients now deceased) from the table, thereby leaving gaps in the RRank sequence. I want to renumber the remaining recs to get rid of the gaps.
I can see what I want to accomplish by using ROW_NUMBER, thus:
SELECT ROW_NUMBER() Over (ORDER BY RRank) as RecNumber, RRank
FROM RPL
ORDER BY RRank
I see the numbers in the RecNumber column falling behind the RRank as I scan down the results
My question is: How to convert this into an UPDATE statement? I had hoped that I could do something like:
UPDATE RISC_PatientList_TEMP
SET RRank = ROW_NUMBER() Over (ORDER BY RRank);
but the system informs that window functions will only work on SELECT (which UPDATE isn't) or ORDER BY (which I can't legally add).
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Mar 26, 2012
I have 2 tables:
TransactionsImport (which is the destination table)
TransactionsImportDelta
I need to do the following:
Get the records with the latest date and time in the destination table TransactionsImport
Get the records with the latest date and time in the destination table TransactionsImportDelta table
Insert the records from the TransactionsImportDelta table into TransactionsImport that have a greater date & time than the current records in TransactionsImport table.
Problem is date & time are in separate columns:
Table structure:
Date Time ID
2011121305154107142201008300100
2011121305154122B1L13ZY0000A07YD
2011121304504735142201090002600
2011121304504737142201095008300
2011121304504737142201090002600
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Mar 17, 2006
I have a SQL query I need to design to select name and email addressesfor policies that are due and not renewed in a given time period. Theproblem is, the database keeps the information for every renewal inthe history of the policyholder.The information is in 2 tables, policy and customer, which share thecustid data. The polno changes with every renewal Renewals in 2004would be D, 2005 S, and 2006 L. polexpdates for a given customer couldbe 2007-03-21, 2006-03-21, 2005-03-21, and 2004-09-21, with polno of1234 (original policy), 1234D (renewal in 2004), 1234S (renewal in2005), and 1235L (renewed in 2006).The policy is identified in trantype as either 'rwl' for renewal, or'nbs' for new business.The policies would have poleffdates of 2004-03-21 (original 6 monthpolicy) 2004-09-21 (first 6 month renewal) , 2005-03-21 (2nd renewal,1 year), 2006-03-21(3rd renewal, 1 yr).I want ONLY THE LATEST information, and keep getting earlyinformation.My current query structure is:select c.lastname, c.email, p.polno, p.polexpdatefrom policy p, customer cwhere p.polid = c.polidand p.polexpdate between '2006-03-01 and 2006-03-31and p.polno like '1234%s'and p.trantype like 'rwl'and c.email is not nullunionselect c.lastname, c.email, p.polno, p.polexpdatefrom policy p, customer cwhere p.polid = c.polidand p.polexpdate between '2006-03-01 and 2006-03-31and p.polno like '1234%'and p.trantype like 'nbs'and c.email is not nullHow do I make this query give me ONLY the polno 123%, or 123%Sinformation, and not give me the information on policies that ALSOhave 123%L policies, and/ or renewal dates after 2006-03-31?Adding a 'and not polexpdate > 2006-03-31' does not work.I am working with SQL SERVER 2003. Was using SQL Server 7, but foundit was too restrictive, and I had a valid 2003 licence, so I upgraded,and still could not do it (after updating the syntax - things likeusing single quotes instead of double, etc)I keep getting those policies that were due in the stated range andHAVE been renewed as well as those which have not. I need to get onlythose which have NOT been renewed, and I cannot modify the database inany way.*** Free account sponsored by SecureIX.com ****** Encrypt your Internet usage with a free VPN account from http://www.SecureIX.com ***
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