Selecting Unique Record

Jul 20, 2005

I have a stored procedure (below), that is suppose
to get a Reg Number from a table, (Reg_Number), in
such a way that every time the stored procedure is called,
it will get a different reg number, even if the stored
procedure is called simultaneously from two different
places,

However it is not working that way.

If two different users access a function in there
VB program at the same time, the two different users
will get the same reg number.

I have looked at the stored procedure, it looks foolproof,
yet it is not working that way.

Thanks in Advance,

Laurence Nuttall
Programmer Analyst III
UCLA - Division of Continuing Education

'---------------------------------------------------------------------------




Here it is:

CREATE PROCEDURE sp_GetNextRegNum
@newRegNum char(6) = NULL OUTPUT
AS
LABEL_GET_ANOTHER_REG:

Select @newRegNum =(select min(Reg) from reg_number)

IF Exists (select Reg from reg_number where reg = @newRegNum )

Begin
Delete from reg_number where reg = @newRegNum

IF @@Error <> 0
Begin
Goto LABEL_GET_ANOTHER_REG
End
--Endif
End

ELSE
GoTo LABEL_GET_ANOTHER_REG
--Endif
GO

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SQL Server 2012 :: Selecting Unique Record From A Table

Feb 10, 2014

I have a table (Billing Table) having multiple records for people having one record per person per each month.

How to get a list of the guys having record just for one month (say feb) and doesn't have any other months.

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Sep 17, 2007

Hello Everyone and thanks for your help in advance.  I have a SQL Server Table wtih approximately 100,000 records.  I need to determine if there are duplicate records in this table.  My probelm is that there is a unique ID column that was added for each row, so I'm not exactly sure how to filter the rows.  Any help on this would be greatly appreciated.  Thanks.

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Jul 31, 2004

I want to start with a table that has 4 records:

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-Self , Supervisor
-Supervisor , Self
-Self , Peer
-Peer , Self
-Self , Direct Rep
-Direct Rep , Self
-Peer , Direct Rep
-Direct Rep, Peer

How would I do this in an SQL Query? Thanks for your help!

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Selecting Unique Records

Mar 21, 2014

I am trying to create a select query similar to the following but the problem I am having is that I want to only select one record where there may be several with the same dw_order_no. I have tried various ways using SQL developer but without success

SELECT VE_EZP_ORDER_TRANS.EZP_BILL_STATUS AS EZP_BILL_STATUS1,
VE_EZP_AGED_CUSTOMER_DEBT.SURNAME,
VE_EZP_AGED_CUSTOMER_DEBT.DEBT_AGE_CATEGORY,
VE_EZP_AGED_CUSTOMER_DEBT.DEBT_AGE,
VE_ORDERLINE.DW_ORDER_NO,

[code]...

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Mar 20, 2008

I got the following query:SELECT TOP (8) ext.extID, ext.Quote, ext.sourceTitle, ext.extRating, gf_game.gameID, gf_game.catID, gf_game.URL, gf_game.TitleFROM         gf_game_ext AS ext INNER JOIN                      gf_game ON gf_game.gameID = ext.gameIDWHERE     (ext.Approved = 1)ORDER BY ext.extID DESC which is e.g. producing this output: 6000 -some text- Title 90 1960 2 tom-cl tom cl5999 -some text- title 90 1960 2 tom-clcl asdf5998 -some text- title 90 1959 2 tom-cl-cl asdfWhat I'd like to do now is to filter out the duplicate GameIDs (= 1960) so that just one unique row with the gameid 1960 is remaining. If I put in a SELECT DINSTINCT TOP(8) it just counts for the table ext, but I need it to count for gf_game.gameID - is that possible?Thanks a lot! 

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Sep 18, 2007

As a beginner i am having trouble with this.
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Then insert these rows, into table A

tried a few different ways & just keep getting strange errors that refer to courier font ??

SQL Team Your my Hero !

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Mar 18, 2007

Hi there, im still learning SQL so thanks in advance.I have a table with columns of customer's information, [customerID], [customerFirst], [customerLast], , [program] ... other columns ...  There will be entries where there can be duplicate customerFirst and customerLast names.  I would like to just return a single entry of the duplicate names and all associated row information.  IE: [customerID], [customerFirst], [customerLast],            [ email],             [program]         01               Bill                 Smith             bill.smith@hotmail.com    ymca        02               Bill                 Smith             bill.smith@hotmail.com    Sports        03               jon                   doe                 jon.doe@hotmail.com    AAA        04               jon                   doe                 jon.doe@hotmail.com    Ebay          05               Paul                 Sprite             paul.sprite@hotmail.com    Rec Desired Returned result:        01               Bill                 Smith             bill.smith@hotmail.com    ymca        03               jon                   doe                 jon.doe@hotmail.com    AAA
         05               Paul                 Sprite             paul.sprite@hotmail.com    Rec So in my code i have this:dAdapter = new SqlDataAdapter("SELECT * FROM [Poc_" + suffix + "] WHERE (SELECT DISTINCT [CustomerLastName], [CustomerFirstName], [CustomerEmail] FROM [Poc_" + suffix + "])", cnStr);         dAdapter.Fill(pocDS, "Data Set");        However this is throwing up an error when i build the app:  An expression of non-boolean type specified in a context where a condition is expected, near ')'.



Description: An
unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the
error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException:
An expression of non-boolean type specified in a context where a
condition is expected, near ')'.

Source Error:




Line 52: //dAdapter = new SqlDataAdapter("SELECT DISTINCT * FROM [Poc_" + suffix + "] ORDER BY [CustomerLastName]", cnStr); Line 53: dAdapter = new SqlDataAdapter("SELECT * FROM [Poc_" + suffix + "] WHERE (SELECT DISTINCT [CustomerLastName], [CustomerFirstName], [CustomerEmail] FROM [Poc_" + suffix + "])", cnStr); Line 54: dAdapter.Fill(pocDS, "Data Set");Line 55: Line 56: //Dataset for name comparison  1: Can someone explain to me why this error is happening?2: Can soemone confirm that my intentions are correct with my code?3: If I'm completely off, can someone steer me in the right direction?Thanks alot!-Terry  

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Aug 10, 2015

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Because I do not know how to use SQL to filter on the partial contents of a database field I am presently reduced to extracting unique full PostCodes using "SELECT DISTINCT PostCode,City,County FROM [ADDRESSES.csv]" into a DataTable object, then sequentially reading that DataTable using the operation of a dictionary object to identify unique PostCode areas, to finally construct the DataTable I need.

Is it possible in SQL to select records where the value of a varying number of characters before a space character in a given (PostCode) field is unique?

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Sep 4, 2007

Hi i was wanting to know how to select a record in a gridview. I have a gridview with firsname and lastname. I currently have select command on it but don't want it. I want to be able to select first name or last name and have it take me to that record on the database.  

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Jun 25, 2004

I'm trying to add a next and previous button to a popup window I have on a photo gallery -

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But how would I get the next one up!

I would hate returning the entire image section and perform the calcuation in the business tier :(

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Mar 1, 2012

I have one table like this:

Code:
CREATE TABLE DlIndexTable
(SessionStartTime DATETIME NOT NULL PRIMARY KEY, SchemaID INTEGER NOT NULL,
DLBaseRate REAL NOT NULL)

and one like so:

Code:
CREATE TABLE DlTextDataTable (
SessionStartTime DATETIME NOT NULL REFERENCES DlIndexTable,
ChTimestamp FLOAT NOT NULL, Channel01data VARCHAR (255),
Channel02data VARCHAR (255), ... , Channel16data VARCHAR (255),
CONSTRAINT TxtDatPriKey PRIMARY KEY (SessionStartTime, ChTimestamp))

I want to get some combined data from both tables, so right now I am joining them at the SessionStartTime column, which is a primary key in the first and a foreign key in the second table, something like this:

Code:
SELECT DlIndexTable.SessionStartTime, DlTextDataTable.Channel01data
FROM DlIndexTable
LEFT JOIN DlTextDataTable
ON DlIndexTable.SessionStartTime = DlTextDataTable.SessionStartTime
WHERE DlIndexTable.SessionStartTime BETWEEN '2006-10-13 16:40:08.790' AND '2012-03-01 17:54:30.930'
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The trouble is that this query, exactly as requested, gives me all the entries from the second table matching the first, while I really would like to pick just one row (preferably, the first chronologically - by ChTimestamp) so that the first column (SessionStartTime) has distinct entries in the resulting table. What would be the simplest way of doing that? Performance is not a big priority over simplicity since the first table could have only a few hundred rows (maybe a couple of thousand), while the second will be real tiny.

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Mar 18, 2015

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The database contains a table, like so:

ClientID, ProjectID, DocumentID, MinorVersion, MajorVersion, Name

Initially, the user will create a “V0.1” document. So the data would look something like

ClientID = 1
ProjectID = 1
DocumentID = 1
MajorVersion = 0
MinorVersion = 1
Name = “My Document”

Thereafter, the user can create new versions as “0.2”, “0.3”, etc., or “1.0”, “1.1”, “2.0”, etc.

For example, a “2.1” document would be stored as:

ClientID = 1
ProjectID = 1
DocumentID = 1
MajorVersion = 2
MinorVersion = 1
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The earlier versions will still exist on the database, but the latest version will be 2.1.

There may be several different documents, with different DocumentID’s (e.g. DocumentID = “1”, DocumentID = “2”), etc., and each of these documents may have many versions.

I’m trying to write a query to display a list of documents showing ClientID, ProjectID, DocumentID, MinorVersion, MajorVersion, Name… but the list should only display the latest version of each document.

So, if the database contained the following records:

ClientID, ProjectID, DocumentID, MajorVersion, MinorVersion, Name
1,1,1,0,1,My Document
1,1,1,0,2,My Document
1,1,1,0,3,My Document
1,1,1,1,0,My Document
1,1,1,2,0,My Document
1,1,1,2,1,My Document
1,1,2,0,1,My Second Document
1,1,2,0,2,My Second Document
1,1,2,0,3,My Second Document

My query should return:

ClientID, ProjectID, DocumentID, MajorVersion, MinorVersion, Name
1,1,1,2,1,My Document
1,1,2,0,3,My Document

… where 2.1 is the latest version of Document 1 and 0.3 is the latest version of Document 2.how to do it.

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Jul 20, 2005

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Mar 26, 2008



This is my first post so I hope I'm doing it to the right forum. I need to compare a LastUpdated time to Start and End Time fields to get the "Due" Time for a given order. Can someone give me the correct SQL? (the example below should result in 6:00:00 AM "Due" time.) All are DATETIME fields. Thank you.

LastUpdated StartTime EndTime DueTime
5/29/2007 12:04:32 AM 2:00:00 AM 11:30:00 AM 3:30:00 PM
11:30:00 AM 5:00:00 PM 9:00:00 PM 5:00:00 PM 2:00:00 AM 6:00:00 AM

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Oct 24, 2005

HI

I HAVE THREE TABLE GEN, PARTY, TXN (GEN & PARRTY IS MASTER TABLE AND
TXN IS TRANSACTION TABLE)
IN TXN TABLE - STORE ALL DATA IN WHICH SAME VOUCHER NUMBER IS REPEATED
ACCORDING TO JOURNAL ENTRY)
NOW PROBLEM IS THIS AT THE TIME OF DISPLAY THE RECORD ON SCREEN I HAVE
TO SHOW ONLY THE UNIQUE VOUCHER NUMBER ONLY..

PLS GUIDE IN THIS QUERY HOW CAN I GET THAT RESULT.


SELECT DISTINCT TXN.VOUCHER, GEN.GLNAME, PARTY.PARTYNAME, TXN.DOCDATE, TXN.GLCODE, TXN.PARTYCODE, TXN.AMOUNT, TXN.VTYPE, TXN.CBCODE, TXN.ADJ, TXN.DC, TXN.NARR
FROM (TXN LEFT JOIN GEN ON GEN.GLCODE=TXN.GLCODE) LEFT JOIN PARTY ON PARTY.PARTYCODE=TXN.PARTYCODE
WHERE TXN.VTYPE='JV'
ORDER BY TXN.VOUCHER


THANKS

ASM

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Apr 24, 2001

Hello.
I need to select a random record from TABLE. It might look easy with using RAND() function, but the tricky part is that ID's which are the PRIMARY KEY, were assigned as a random number.
So right now ID's in that TABLE look some thing like that: -18745, 45809, 129, -5890023, 487910943, -209, etc...
If any one have any ideas please respond.
Thanks in advance.

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May 19, 2004

Hi all,

I Have the following situation:

CREATE TABLE First_Table (id INTEGER IDENTITY(1,1) NOT NULL,
titre VARCHAR(50) NOT NULL,
annee INTEGER NOT NULL,
idMES INTEGER,
genre VARCHAR(20) NOT NULL,
resume TEXT,
codePays VARCHAR(4),
CONSTRAINT PKFilm PRIMARY KEY (idFilm),
FOREIGN KEY (idMES) REFERENCES Artiste,
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I'ld like fill in this tables records inserting in the column id values I got in the one other table. In Oracle it is possible to do it using sourceTable.nextval where sourceTable is created as: CREATE SEQUENCE sourceTable;
How can I do it in MS SQL or Transact-sql?

Thanx all

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May 25, 2005

I'm no SQL whizz yet but I'm learning hard, and need to get some information from our DB rather urgently so have resorted to this fantastic forum, only I can't find what I'm looking for.

Basically I'm selecting a whole load of entries that have a (admission)date field after 2001, but I only want to return the Earliest (admission) for each (patients number).

Here is the script I have created to select all the data, but how can I limit the results to just the earliest (admission date) for each (patient).


SELECT
Admission_Year, Admission_Month, Age_On_Admission, [Length of stay(continuing)], [Patient's Number], [Cons epis seq no], Sex, [Main Primary Pas Diag], [Date of Death], [Epi duration], [OP Code1], [Admission date], [Date of Death] - [Admission date] AS [days before death],[Intended Management]
FROM dbo.Admissions
WHERE (Admission_Year > 2001) AND (Age_On_Admission > '64') AND ([Intended Management] = 'inpatient') AND ([Date of Death] IS NULL)


I would really appreciate it if anyone can help with this, I'm sorry I can't really contribute to this forum as an SQL expert as .net is really my forte and I usually spend my time contributing to the asp.net forums. :)

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May 21, 2001

Hi

I'm sure this is an easy problem but my brain is fried today...however how do I do the following:


I have a two column table. One is a key field where duplicates can arise and the other is a datetime field. So you might have some records looking like this:

1231999-06-14 12:17:11.000
1231999-06-14 12:17:31.310
1231999-06-14 12:17:31.000
1231999-06-14 12:22:56.000
1231999-06-14 12:22:58.000
8901999-06-15 10:00:18.000
8901999-06-15 10:03:30.340
8901999-06-15 10:03:30.000
8901999-06-15 10:03:40.000

OK, how do I get the top 1 of each key so that I get a subset of records looking like the following:
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8901999-06-15 10:00:18.000


Thanks in advance


Bazza

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Oct 10, 2006

I have the following query I am using to identify duplicate records in one of my database tables:


Code:


SELECT memberID,
COUNT(memberID) AS NumOccurrences
FROM ChapterMembers
GROUP BY memberID
HAVING ( COUNT(memberID) > 1 )



Executing the above proc returns 4079 records...

Now, I would also like to know the ChapterID for each member with a duplicate record. ChapterID is also stored in the ChapterMembers Table...

I tried running the following procedure:


Code:

SELECT memberID,
COUNT(memberID) AS NumOccurrences, chapterID
FROM ChapterMembers
GROUP BY memberID, chapterID
HAVING ( COUNT(memberID) > 1 )



But zero results are returned ...

The ultimate goal here is to identify duplicate records where one of their chapterID's = '81017' and to delete that record from the database.

Anyone have any ideas what I am doing wrong? Also, any suggestions for removing the records would be appreciated.

Thanks,

Jandrews

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May 14, 2014

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Note that the action id in the data below is also sorted but in practice this need not be the case. The sorting key is prevalent.

output of the query is

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4665 4 clean
34540 96 pickup
24000 901 clean
declare @mytable table (
id_action int,
id_shift int,

[code]....

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Apr 20, 2007

Hi,

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2007-04-20 16:27:01

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Thanks very much,

dai.hop

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-- create table
if object_id('tempdb..#tmpdelnotes') is not null
drop table #tmpdelnotes

create table #tmpdelnotes(
DelNote int identity (1,1) ,
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Item int not null,
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[code]...

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Select h.worknumber, h.itemcode, h.descr, h.task_descr, h.qty, h.itemised,
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[Code] ....

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2. sm.next_calendar_date - this should return only the most recent date out of those selected for the certificates on this piece of equipment

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Selecting TOP X Child Records For A Parent Record

Oct 29, 2006

Hi,I have a stored procedure that has to extract the child records forparticular parent records.The issue is that in some cases I do not want to extract all the childrecords only a certain number of them.Firstly I identify all the parent records that have the requird numberof child records and insert them into the result table.insert into t_AuditQualifiedNumberExtractDetails(BatchNumber,EntryRecordID,LN,AdditionalQualCritPassed)(select t1.BatchNumber,t1.EntryRecordID,t1.LN,t1.AdditionalQualCritPassedfrom(select BatchNumber,RecordType,EntryRecordID,LN,AdditionalQualCritPassedfrom t_AuditQualifiedNumberExtractDetails_Temp) as t1inner join(select BatchNumber,RecordType,EntryRecordID,Count(*) as AssignedNumbers,max(TotalNumbers) as TotalNumbersfrom t_AuditQualifiedNumberExtractDetails_Tempgroup by BatchNumber, RecordType, EntryRecordIDhaving count(*) = max(TotalNumbers)) as t2on t1.BatchNumber = t2.BatchNumberand t1.RecordType = t2.RecordTypeand t1.EntryRecordID = t2.EntryRecordID)then insert the remaining records into a temp table where the number ofrecords required does not equal the total number of child records, andthenloop through each record manipulating the ROWNUMBER to only selectthe number of child records needed.insert into @t_QualificationMismatchedAllocs([BatchNumber],[RecordType],[EntryRecordID],[AssignedNumbers],[TotalNumbers])(select BatchNumber,RecordType,EntryRecordID,Count(*) as AssignedNumbers,max(TotalNumbers) as TotalNumbersfrom t_AuditQualifiedNumberExtractDetails_Tempgroup by BatchNumber, RecordType, EntryRecordIDhaving count(*) <max(TotalNumbers))SELECT @QualificationMismatched_RowCnt = 1SELECT @MaxQualificationMismatched = (select count(*) from@t_QualificationMismatchedAllocs)while @QualificationMismatched_RowCnt <= @MaxQualificationMismatchedbegin--## Get Prize Draw to extract numbers forselect @RecordType = RecordType,@EntryRecordID = EntryRecordID,@AssignedNumbers = AssignedNumbers,@TotalNumbers = TotalNumbersfrom @t_QualificationMismatchedAllocswhere QualMismatchedAllocsRowNum = @QualificationMismatched_RowCntSET ROWCOUNT @TotalNumbersinsert into t_AuditQualifiedNumberExtractDetails(BatchNumber,EntryRecordID,LN,AdditionalQualCritPassed)(select BatchNumber,EntryRecordID,LN,AdditionalQualCritPassedfrom t_AuditQualifiedNumberExtractDetails_Tempwhere RecordType = @RecordTypeand EntryRecordID = @EntryRecordID)SET @QualificationMismatched_RowCnt =QualificationMismatched_RowCnt + 1SET ROWCOUNT 0endIs there a better methodology for doing this .....Is the use of a table variable here incorrect ?Should I be using a temporary table or indexed table if there are alarge number of parent records where the child records required doesnot match the total number of child records ?

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Selecting A Top Record Based On A Datestamp Field

Jan 30, 2008



This is a simple one, and I know that it has to be fairly common, but I just can't figure out an elegant way to do it. I have a table with the following fields:
OrderID (FK, not unique)
InstallationDate (Datetime)
CreateDtTm (Datetime)

There is no PK or Unique ID on this table, though an combo of OrderID and CreateDtTm would ostensibly be a unique identifier.

For each OrderID, I need to pull the InstallationDate that was created most recently (based on CreateDtTm). Here's what I've got so far, and it works, but man is it ugly:



SELECT a.OrderID, InstallationDate

FROM ScheduleDateLog a

INNER JOIN

(SELECT OrderID, max(convert(varchar(10),CreateDtTm,102)+'||' +convert(varchar(10), InstallationDate,102)) as TopRecord

FROM ScheduleDateLog GROUP BY OrderID) as b

ON convert(varchar(10),CreateDtTm,102)+'||' +convert(varchar(10), InstallationDate,102)=b.TopRecord

AND a.OrderID = b.OrderID

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Generate Unique Numbers For Each Record

May 1, 2008

Hi

I am using sqlserver 2005 and want to generate unique numbers for all the records in a table using sql.

Something like table A has



FRUITS
-------------
Oranges
Mangoes
Apricots
....



I want to write a sql query that does something like

SELECT convert(varchar(8),getdate(),12)+'000001' my_number,
fruits
from table A

so the output is


my_number Fruits
080501000001 Oranges
080501000002 Mangoes
080501000003 Apricots
....


regards
Hrishy

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Join To Show One Row Per Unique Record

Apr 23, 2015

I am new to SQL but trying to do join a few tables to get result showing showing one row per unique record.

Tables include:-

1. REQ
2. RFQ
3. PO
4. DOCUMENT (contains LAST_DOCUMENT_STATUS, DOCUMENT_ID, DOCUMENT_NUMBER, for example, REQ_CANCELLED, REQ_ID, REQ_NO)
5. DOCUMENT_STATUS (contains status of document, REQ_CREATE)
6. DOCUMENT_TRAIL (contains link between documents, PARENT_DOCUMENT, CURRENT_DOCUMENT, for example, REQ_ID (PARENT_DOCUMENT), RFQ_ID (CURRENT_DOCUMENT)
7. PO_REVISION (contains PO REVISION, when link with DOCUMENT, PO_REV_NO)

Currently when i tried to join all the TABLES, i get multiple lines against REQ_NO.

I realised the multiple lines generated due to the following:-

One to many relationships:
A. RFQ - 1 or more PO
B. PO - 1 or more PO_REVISON

I was thinking how to MAX the records in PO to show only the last PO_REVISION. It seems that DOCUMENT_TRAIL will contain 1 base document PO and 1 or more PO_REVISION.

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