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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Selecting Unique Record

Jul 20, 2005

I have a stored procedure (below), that is supposeto get a Reg Number from a table, (Reg_Number), insuch a way that every time the stored procedure is called,it will get a different reg number, even if the storedprocedure is called simultaneously from two differentplaces,However it is not working that way.If two different users access a function in thereVB program at the same time, the two different userswill 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 NuttallProgrammer Analyst IIIUCLA - Division of Continuing Education'---------------------------------------------------------------------------Here it is:CREATE PROCEDURE sp_GetNextRegNum@newRegNum char(6) = NULL OUTPUTASLABEL_GET_ANOTHER_REG:Select @newRegNum =(select min(Reg) from reg_number)IF Exists (select Reg from reg_number where reg = @newRegNum )BeginDelete from reg_number where reg = @newRegNumIF @@Error <> 0BeginGoto LABEL_GET_ANOTHER_REGEnd--EndifEndELSEGoTo LABEL_GET_ANOTHER_REG--EndifGO

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PC SQL Server Table (with A Column Classified Unique) Synchronizes (using Merge) With 2 PPCs SQL Mobile Adding The Same Record

Aug 29, 2006

Hi, I have a doubt about the behaviour of SQL Server 2005 in the situation I'm going to describe you.
Suppose that you have a SQL Server 2005 database on your PC, and suppose that this database has a table with a column classified as "unique" (so it's impossible for this table to contain 2 records having the same value in this column).
Suppose that you publish this database and you create 2 SQL Server Mobile 2005 subscriptions on 2 Pocket PCs.
Suppose now that the first PPC (using an embedded program) creates a record with a certain value for the column (and adds it to the table), and the second PPC makes the same thing (it inserts a record with the same column value of the first PPC).
At this point, you connect the 2 PPCs to your PC (one by one, of course), to synchronize (using merge replication) the databases...

WHAT HAPPENS??? Does an error raise?
Must you give a publication setting in which you say that, if this situation occurs, PC SQL Server holds the last (or the first, as you decide) record acquired? Is it possible?

Thank you very much

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SQL Server 2012 :: Unique Index On Table

Mar 20, 2015

I am trying to create a unique index on a table such that the combination of 2 columns is unique. How do I go about that?

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SQL Server 2012 :: Failing On Update With Unique Index Error (Not Unique)

Jul 5, 2015

This index is not unique

ix_report_history_creative_id

Msg 2601, Level 14, State 1, Procedure DFP_report_load, Line 161
Cannot insert duplicate key row in object 'dbo.DFP_Reports_History' with unique index 'ix_report_history_creative_id'.

The duplicate key value is (40736326382, 1, 2015-07-03, 67618862, 355324).
Msg 3621, Level 0, State 0, Procedure DFP_report_load, Line 161

The statement has been terminated.

Exception in Task: Cannot insert duplicate key row in object 'dbo.DFP_Reports_History' with unique index 'ix_report_history_creative_id'. The duplicate key value is (40736326382, 1, 2015-07-03, 67618862, 355324).

The statement has been terminated.

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SELECTing Random Record From TABLE?

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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Insert Record Selecting Then To A First Table

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,
FOREIGN KEY (codePays) REFERENCES Pays);

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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Selecting Only The Last Record In Joined Table

Oct 10, 2005

Hello everyone, I have a query problem.I'll put it like this. There is a 'publishers' table, and there is a'titles' table. Publishers publish titles (of course). Now I want to make aquery (in MS SQL Server) that would return the last title published by everyof the publishers. Quite clear situation. But I can't make it work.If I use inner join (which I should, because I need data from both tables)then I get a result showing all publishers and all titles. What I want toget is all publishers, and only their last title, so I don't have more thanone line for the same publisher, and this line should contain publisherdetails and last title details.I tried using DISTINCT, but it works on a whole resultant row rather then acolumn, and since rows are all distnict (because they also contain columnsfrom titles) this didn't help me.What I can do is (in my application) first get a list of publishers, andthen loop through them selecting only the last title belonging to eachpublisher. I want to see if there is a way to accomplish the same thing withan SQL query (or maybe a stored procedure, view, or whatever). Anything ispossible, as long as it stays within SQL server and doesn't rely on theclient application.Of course, both 'publishers' and 'titles' tables have a primary key('publisherID', and 'titleID'), and 'titles' has a 'publisherID' columnwhich relates titles with publishers.Help :)

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SQL Server 2012 :: Update Record In Table?

Nov 7, 2014

To see where is the problem I am trying to count rows in the database.First I create a table A with 2 columns namely tablename, rowbefore and rowafter and I insert records in it as below.

INSERT INTO A
SELECT TableName = o.name, '', Rows = max(i.rows) FROM sysobjects o
INNER JOIN sysindexes i ON o.id = i.id
WHERE xtype = 'u' AND OBJECTPROPERTY(o.id,N'IsUserTable') = 1
GROUP BY o.name
ORDER BY o.name
Then I update rowbefore with rowafter as below.
UPDATE A SET rowbefore = rowafter

Now I launch my application with update records in the database.Then I am trying to update rowafter with new records as below.

UPDATE A
SET rowafter = (SELECT max(sysindexes.rows) FROM sysobjects
INNER JOIN sysindexes ON sysobjects.id = sysindexes.id
WHERE xtype = 'u' AND OBJECTPROPERTY(sysobjects.id,N'IsUserTable') = 1 AND A.tablename = sysobjects.name)

Does this update really update my column rowafter or not?

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Table Relationship Question For Unique Record

Apr 9, 2008

Hello Hello,
This Noob has a question.
I have been atempting for days to figure this out.
I have this set up: (See Below)

The Problem I am having is occuring at the Table named OU in Maroon below.
It combines 2 chains of keys into one table to try and make a unique record.
The problem is that it is not.

Pasted below is a Query run on the data within the tables:
As you can see certain data is getting duplicated in this tabel.
I want 1 Unique record in the OU table based upon the Study ID Primary Key and the zCombined Primary Key.

Any Ideas as to what is wrong, or how to make it work would defineatly be appreciated.

Thanks a Bunch


Table: Sponsor
PK: Sponsor ID

Table: Protocol
PK: ProtocolID
FK: Sponsor ID

Table: Study
PK: StudyID
FK: ProtocolID
Table: OUPK: OUIDFK: StudyIDFK: zCombinedID

Table:zCombined
PK: zCombinedID
FK: TempID ~ To Temp Table
FK: ShipTypeID ~ To Ship Type Table
FK: CoordinatorID ~ To Coordinator Table
FK: BoxTypeID ~ To Box Type Table







Sponsor

Protocol

Study

OU~Column1

OU~Column2

Box

Coordinator

Ship Type

Temp


Omni

AAAAA

XPG

S0101

NA

Wheaton

Raul Vargas

Daily

-70


Omni

AAAAA

XPG

S0101

NA

Matrix

Raul Vargas

Daily

-70


Omni

AAAAA

XPG

S0101

NA

B-1

Raul Vargas

Daily

-70


Omni

AAAAA

XPG

S0101

NA

9 x 9 4mL

Raul Vargas

Daily

-70


Omni

AAAAA

XPG

S0101

NA

9 x 9 2mL

Raul Vargas

Daily

-70


Omni

AAAAA

XPG

S0101

S0201

Wheaton

Mike Keane

DNA

-40


Omni

AAAAA

XPG

S0101

S0201

Matrix

Mike Keane

DNA

-40


Omni

AAAAA

XPG

S0101

S0201

B-1

Mike Keane

DNA

-40


Omni

AAAAA

XPG

S0101

S0201

9 x 9 4mL

Mike Keane

DNA

-40


Omni

AAAAA

XPG

S0101

S0201

9 x 9 2mL

Mike Keane

DNA

-40

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How To Fetch Record From Temp Table - Unique Combination

Sep 23, 2014

Table :StudentTeacherRelation

Id StdId TeacherName Day subject
1 1 Archana Monday English
2 1 Archana Tue Marathi
3 1 Shama Wed Hindi
4 1 shama Thus Hindi
5 1 Kavita Fri Hindi
6 2 Archana Mon english
7 2 Dipti Tues Hindi

Second table : Student

Id Sname Cid
1 Shalini 1
2 Monika 1
3 Rohan 3

I want to fetch uniq combination of stuid and subject.Result should show all subject of student whether may be teachername and day. If I choose shalini whose stuid is 1,all subject for shalini(hindi,english,marathi) should come. Record from either of three should come

Id StdId TeacherName Day subject
3 1 Shama Wed Hindi
4 1 shama Thus Hindi
5 1 Kavita Fri Hindi

I want fetch studentname along with teachername,day and subject whose cid = 1 here is my query

select Student.Sname,TeacherName, Day,subject
from StudentTeacherRelation
inner join Student
Student.id = StudentTeacherRelation.StuId
where cid = 1

I want place result of it in temp,Want fetch max(id) from temp table by doing group by on Sname and Subject.find all id from temp table where that id present in max id.

show
Id StdId TeacherName Day subject
where (1,2,3,4,5,6,7-- all id from temp) in (1,2,5,6,7 -- max id from temp by doing group by on Sname and subject)

So it will show record Id StdId TeacherName Day subject where id is 1,2,5,6,7.Only five record should come.How to do that?

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SQL Server 2012 :: Inserting Record In Table - Trigger Error

Aug 6, 2014

I am inserting a record in XYZ table(DB1). Through trigger it will update ABC table(DB2).

I am getting error when doing above thing. What are the roles to be set to user to avoid above problem.

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T-SQL (SS2K8) :: Identify Columns Which Will Create Unique Record In A Table

Sep 15, 2014

I am looking to create a script that will go through a table a pick out the necessary columns to create a unique record. Some of the tables that I am working with have 200 plus columns and I am not sure if I would have to list every column name in the script or if they could be dynamically referenced. I am working with a SQL server that has little next to no documentation and everytime I type to mere some tables, I get too many rows back.

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SQL Server 2012 :: How To Join Tables To Get Only Record With Specific Field Value In A Table

Feb 6, 2015

I have a table of "applicants" with unique applicant id and another table "reviews" with reviews which has unique id and Emplid and contains general program name like Math and then may contain 3 addition rows for specific program like Calculus, algebra, geometry etc.

There may or may not be a record for each applicant id in table reviews or there can be 1 or more than one record in reviews based on level of review( General or Specific).

All the general reviews has “Math” as Program_code but if there are more reviews, they can have Program_code like “Cal” , “Abr”, “Geo”

I want to join the tables so I can get all the records from both the tables where Program_code in reviews table is “Math” only.

That is I want to join the table and get all the records from reviews table where the program_code is “Math” only
How can I do that?

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SQL 2012 :: Selecting Maximum Value From Denormalized Table

Mar 6, 2015

I inherited a table with this structure:

Value a Value b
x date a
x date b
x date c
y date d
z date e
z date e
z date f

Value a fields are one to many. The objective is to obtain the maximum date value for each unique a value.

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SQL Server 2014 :: Missing One Record When Selecting By Date Range

May 26, 2015

When I run this query:

SELECT orderno, *
FROM _order
WHERE order_date >= '5/14/2015 00:00:00'
AND order_date < '5/15/2015 11:59:59'
ORDER BY order_date asc

I get a result of:

A1G7222015-05-14 13:00:11.143
A1G7232015-05-14 13:33:35.407
A1G7242015-05-14 13:39:16.657
A1G7252015-05-14 14:25:43.507
A1G7262015-05-14 14:29:18.050
A1G7272015-05-14 15:38:12.263

But I know there is one more record that falls into 05/15/2015

A1G7282015-05-15 12:26:52.807

Can you see what I am missing in my query in order for me to retrieve the missing record A1G728?

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SQL Server 2014 :: Selecting And Merging Records For Singular Complete Record

Jan 24, 2015

I have a database full of different types of leads some for company A some for company B and so on, each doing a different service. However the leads from B can be used for A and leads from A can be used for B, so I want to merge the data.

Example:

Phone Number Name Home Owner Credit Insurance
727-555-1234 Dave Thomas Yes B
727-555-1234 Dave Thomas Gieco

I would like the end result to be one record:

Phone Number Name Home Owner Credit Insurance
727-555-1234 Dave Thomas Yes B Gieco

Since these were imported into SQL they all have a unique ID, here are the current labels

ID,phone_ number,first_ name,last_name,address1, address2, address3,city,state,postal_code,HOME_OWNR,HH_INCOME,CREDIT_RATING,AGE,MATCH,source_id,
title,comments,dnc_flag,provider,vehicle,coverage,alt_phone,email,marital status,dob

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Selecting Unique Records

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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Selecting All Unique Combinations

Jul 31, 2004

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

-Self
-Supervisor
-Peer
-Direct Rep

And I want to end with a table that has every unique combination of these records (the order being reversed would be considered 'unique' in this context)

-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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Selecting Unique Rows In A Join

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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Selecting & Then Inserting Unique Rows

Sep 18, 2007

As a beginner i am having trouble with this.
i have two different tables , both have a name column, nvarchar datatype.
I would like to select from table B all the rows which contain a name which is not in table A.
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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SQL Server 2012 :: Selecting Max Between Two Dates For A Given Year

Jul 23, 2015

I have three tables: EMP (ID, NAME), EMPDATE (ID, STARTDATE, ENDDATE), YEAR(YEAR)

I would like to get the most recent date within a given year per each EMP? For example, EMPID 1 can be enrolled in many programs, each program has start end dates. I need to list the most recent date an employee was enrolled (max date between START AND END DATE which ever is most recent enrollment) for a given year. For example, for 2014 his/her most recent enrollment should be 10/23/2014 for year 2014 and 2013-10-24 for year 2013.

SELECT ID, EMP.NAME, DTE.StartDate, DTE.ENDDATE, year
FROM
EMP_DATE DTE join
EMP_INFO EMP on EMP.ID = DTE.ID join
YEAR YR on YR.YEAR = YEAR(DTE.STARTDATE)

DATA SAMPLE:

EMP
ID NAME
1 JOHN

EMP_INFO
ID STARTDATE ENDDATE
12013-10-24 2014-03-11
12014-06-13 2014-03-11
12014-06-15 2014-03-11
12014-09-08 2014-03-11
12014-09-12 2014-03-11
12014-09-14 2014-03-11
12014-01-13 2014-05-17
12014-05-14 2014-06-09
12014-06-10 2014-06-16
12014-08-31 2014-09-04
12014-09-05 2014-09-06
12014-09-07 2014-10-23

YEAR

Year
2012
2013
2014
2015

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SQL 2012 :: Delete Record From Table With ID And Rownumber

Mar 17, 2014

I will try my best to explain this, We have a shopping cart on our website, the person that was developing this has now left the company and I've been given the job to finish it off.

When I load all the items that the user has entered in to his/her cart I return the Item ID and the RowNumber (ROW_NUMBER() OVER (Order by Id) AS RowNumber)

I'm trying to delete the item from the table using the following query

DELETE FROM [dbo].[Cart.Items] WHERE UniqueID = UniqueID and ItemID = @ItemID and @RowNumber IN (
SELECT ROW_NUMBER() OVER (Order by Id) AS RowNumber)

Now the reason we are using the RowNumber is because the user can add the same Item as many times as they like so for example you buy 3 different mobile phones, and you want three screen protectors, they will click screen protector 3 times which will add 3 records in to the db with the same id. so the row number is used to find the correct one.

But the above delete is not working.

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Selecting The Rows Based Off Of Unique Columns

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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Selecting Records Where Part-field Is Unique

Aug 10, 2015

I have a very large CSV file containing name-and-address information which I am reading in a Visual Basic project using the Microsoft.JetOLEDB.4.0 provider.

The key field on which the CSV file is to be filtered is the PostCode field.  This is a UK-format PostCode "XXnn Nxx" where "XX" is one or more letters denoting a geographical area within the UK and "nn" is one or more characters (starting with at least one numeric digit) which when combined with the area code denotes a specific district within the geographical area.  My aim is to identify all the unique UK postal districts held within my address CSV file.

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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May 13, 2014

I've got an OLEDB DB2 linked server to a db2/AS400 instance and selecting from a table on the server has never caused problems before. One of the columns is a large text field. If I select all the columns but the large text field, it returns as normal, but including the large text field now, I get:

"Transport error: shared memory provider error: 0 - no process is on the other end of the pipe"

The largest entry in the text field is about 5k characters, and there don't appear to be any strange characters.

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SQL Server 2012 :: Selecting Records From Multiple Tables?

Jul 1, 2015

i have this query in a proc

declare @bu_id INT,
@CurCaptureDate DATETIME,
@user_id INT,
@col_name VARCHAR(100),
@sort_order VARCHAR(4),
@CityPair_ID INT=NULL,

[code]....

where @reasons and @departure_code can be multiple.

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SQL Server 2012 :: Evaluating Rows And Selecting Specific Records

Mar 18, 2015

I have a table with some examples below. I need to identify records where:

1. the person has 3 or more consecutive months ordered.
2. I then need to exclude the first and last month and capture only those Months in between.

PERSON ID MONTH ORDERED
JD12345 4
JD12345 7
JD12345 8 Note: JD12345 should be excluded entirely

[code]....

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SQL Server 2012 :: Selecting Matching Rows Which Exist In Particular String?

Apr 3, 2015

Suppose I have string like

@strname varchar= = '3 April 15 abcd Oh rrrrrrrAAAAdd HJHJG'

and table contains two columns having rows like,

ID text
1 abcd ER
2 abcd AS
3 abcd Oh
4 xyz TR
5 azs WS
6 abcd O
7 OP trx

how can I search a ID's which are exist in my string.

result should be,

3 abcd Oh
6 abcd O

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SQL Server 2012 :: Unique Identifier As Identity Field

Dec 27, 2013

So for years I was using the int identity(1,1) primary_key for all the tables I created, and then in this project I decided, you know, I like the uniqueidentifier using newsequentialid() to ensure a distinctly unique primary key.

then, after working with the php sqlsrv driver, I realized huh, no matter what, i am unable to retrieve the scope_identity() of the insert

So of course I cruised back to the MSSMS and realized crap, I can't even make the uniqueidentifier an identity.

So now I'm wondering 2 things...

1: Can I short cut and pull the uniqueidentifier of a newly inserted record, even though the scope_identity() will return null or
2: do I now have to add a column to each table, keep the uniqueidentifier (as all my tables are unified by that relationship) and also add a pk field as an int identity(1,1) primary_key, in order to be able to pull the scope_identity() on insert...

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SQL Server 2012 :: How Update Works For Unique Values

Nov 25, 2014

Look at the following code,

Create table #test
(
id int primary key,
Name varchar(100)
)
insert into #test values (1,'John')
insert into #test values (2,'Walker')

[Code] ....

-- Query 1 :
update #test set name = 'Joney' where id = 1

-- Query 2 :
set rowcount 1
update #test set name = 'Joney' where id = 1
set rowcount 0

1. #test table have primary key & clustered index.
2. Obviously only one row will be available for an id.
3. In query 1, will the sql server look for matching rows even after it found 1 row?
4. Will query 2 really gains some performance?

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SQL Server 2012 :: Dynamically Create A Script Only Selecting Columns Where There Is Data?

Dec 2, 2013

I have created some dynamic sql to check a temporary table that is created on the fly for any columns that do contain data. If they do the column name is added to a dynamic sql, if not they are excluded. This looks like:

If (select sum(Case when [Sat] is null then 0 else 1 end) from #TABLE) >= 1 begin set @OIL_BULK = @OIL_BULK + '[Sat]' +',' END However, I am currently running this on over 230 columns and large tables 1.3 mil rows and it is quite slow. How I can dynamically create a sql script that only selects the columns in the table where there is data in a speedier manner. Unfortunately it has to be on the fly because the temporary table is created on the fly.

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