Removing Duplicate Rows With CTE And Partition - Need Most Recent Entry
Sep 28, 2007
I have tested the code below to remove duplicate table entries based on the field IntOOS. This code works; however, I want to ensure I am removing the oldest entries and keeping the most recent entry. The field to key on this would be something like Max(ID). What would be the best way to ensure I keep the most recent table entry?
/*** Removes duplicate rows from ampfm.rpt_AdtVisitDiag table
by Chuck King 20070928
***/
;WITH CTE
as
(
SELECT
ROW_NUMBER() OVER (Partition By IntOOS Order BY IntOOS) AS ROWID
Please give the DML to SELECT the rows avoiding the duplicate rows. Since there is a text column in the table, I couldn't use aggregate function, group by (OR) DISTINCT for processing.
Table :
create table test(col1 int, col2 text) go insert into test values(1, 'abc') go insert into test values(2, 'abc') go insert into test values(2, 'abc') go insert into test values(4, 'dbc') go
Hi, I have results from a survey in a table, every entry is assigned a unique ID. I want to remove duplicate entries based on the survey data but not on the unique ID (obviously). So far I have...SELECT DISTINCT RespondantID, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13 FROM Results But that gives...
1 - Anonymous 1 1 1 1 1 1 1 1 1 1 1 1 1
2 - Anonymous 2 2 2 2 2 2 2 2 2 2 2 2 2
3 - Martin 2 2 2 2 2 2 2 2 2 2 2 2 2 I.e. in the above example, it would seem that 'Martin' submitted his data once and then submitted it again with his name. How can I remove the '2 - Anonymous' frrom the data set? Thanks!
Hi, Please help me with an SQL Query that fetches all the records from the three tables but a unique record for each forum and topicid with the maximum lastpostdate. Please provide separate solutions for SqlServer2000/2005. I have four tables namely – Forums,Topics,Threads and Messages in SQL Server2000 (scripts for table creation and insertion of test data given at the end). Now, I have formulated a query as below :- SELECT Forums.forumid AS ForumID,Topics.topicid AS TopicID,Topics.name AS TopicName,LastPosts.date as LastPostDate,LastPosts.author AS Author, (select count(threadid) from Threads where Threads.topicid=Topics.topicid) as NoOfThreads FROM Forums JOIN Topics ON Forums.forumid=Topics.forumid LEFT OUTER JOIN ( SELECT Topics.forumid,Threads.topicid,Messages.date,Messages.author FROM Topics INNER JOIN Threads ON Topics.topicid = Threads.topicid INNER JOIN Messages ON Threads.threadid=Messages.threadid WHERE Messages.date=(SELECT MAX(date) FROM Messages WHERE Messages.threadid = Threads.threadid) ) as LastPosts ON LastPosts.forumid = Topics.forumid AND LastPosts.topicid = Topics.topicid Whose result set is as below:-
forumid topicid name LastPostDate author NoOfThreads
5 17 General NULL NULL 0 I want all the rows from the Forums,Topics and Threads table and the row with the maximum date (the last post date of the message) from the Messages table as shown above. When I use the query by using only three tables namely Forums,Topics and Threads, I get the correct result. The query is as:- SELECT Topics.forumid AS ForumID,Forums.name AS ForumName,Topics.topicid as TopicID,Topics.name as TopicName, LastPosts.author AS Author,LastPosts.lastpostdate AS LastPost, (select count(threadid) from threads where Threads.topicid=Topics.topicid) as NoOfThreads FROM Forums JOIN Topics ON Forums.forumid=Topics.forumid LEFT OUTER JOIN ( SELECT Topics.forumid, Threads.topicid, Threads.lastpostdate, Threads.author FROM Threads INNER JOIN Topics ON Topics.topicid = Threads.topicid WHERE Threads.lastpostdate IN (SELECT MAX(lastpostdate) FROM threads WHERE Topics.topicid = Threads.topicid) ) AS LastPosts ON LastPosts.forumid = Topics.forumid AND LastPosts.topicid = Topics.topicid Whose result set is as:-
5 General 17 General NULL NULL 0 The scripts for creating the tables and inserting test data is as follows in an already created database:- if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[FK__Topics__forumid__35BCFE0A]') and OBJECTPROPERTY(id, N'IsForeignKey') = 1) ALTER TABLE [dbo].[Topics] DROP CONSTRAINT FK__Topics__forumid__35BCFE0A GO if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[FK__Threads__topicid__34C8D9D1]') and OBJECTPROPERTY(id, N'IsForeignKey') = 1) ALTER TABLE [dbo].[Threads] DROP CONSTRAINT FK__Threads__topicid__34C8D9D1 GO if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[FK__Messages__thread__33D4B598]') and OBJECTPROPERTY(id, N'IsForeignKey') = 1) ALTER TABLE [dbo].[Messages] DROP CONSTRAINT FK__Messages__thread__33D4B598 GO if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Forums]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [dbo].[Forums] GO if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Topics]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [dbo].[Topics] GO if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Threads]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [dbo].[Threads] GO if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Messages]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [dbo].[Messages] GO CREATE TABLE [dbo].[Forums] ( [forumid] [int] IDENTITY (1, 1) NOT NULL , [name] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , [description] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ) ON [PRIMARY] GO CREATE TABLE [dbo].[Topics] ( [topicid] [int] IDENTITY (1, 1) NOT NULL , [forumid] [int] NULL , [name] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , [description] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ) ON [PRIMARY] GO CREATE TABLE [dbo].[Threads] ( [threadid] [int] IDENTITY (1, 1) NOT NULL , [topicid] [int] NOT NULL , [subject] [varchar] (100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , [replies] [int] NOT NULL , [author] [varchar] (100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , [lastpostdate] [datetime] NULL ) ON [PRIMARY] GO CREATE TABLE [dbo].[Messages] ( [msgid] [int] IDENTITY (1, 1) NOT NULL , [threadid] [int] NOT NULL , [author] [varchar] (100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL , [date] [datetime] NULL , [message] [text] COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY] GO ALTER TABLE [dbo].[Forums] ADD PRIMARY KEY CLUSTERED ( [forumid] ) ON [PRIMARY] GO ALTER TABLE [dbo].[Topics] ADD PRIMARY KEY CLUSTERED ( [topicid] ) ON [PRIMARY] GO ALTER TABLE [dbo].[Threads] ADD PRIMARY KEY CLUSTERED ( [threadid] ) ON [PRIMARY] GO ALTER TABLE [dbo].[Messages] ADD PRIMARY KEY CLUSTERED ( [msgid] ) ON [PRIMARY] GO ALTER TABLE [dbo].[Topics] ADD FOREIGN KEY ( [forumid] ) REFERENCES [dbo].[Forums] ( [forumid] ) GO ALTER TABLE [dbo].[Threads] ADD FOREIGN KEY ( [topicid] ) REFERENCES [dbo].[Topics] ( [topicid] ) GO ALTER TABLE [dbo].[Messages] ADD FOREIGN KEY ( [threadid] ) REFERENCES [dbo].[Threads] ( [threadid] ) GO ------------------------------------------------------ insert into forums(name,description) values('Developers','Developers Forum'); insert into forums(name,description) values('Database','Database Forum'); insert into forums(name,description) values('Desginers','Designers Forum'); insert into forums(name,description) values('Architects','Architects Forum'); insert into forums(name,description) values('General','General Forum'); insert into topics(forumid,name,description) values(1,'Java Overall','Topic Java Overall'); insert into topics(forumid,name,description) values(1,'JSP','Topic JSP'); insert into topics(forumid,name,description) values(1,'EJB','Topic Enterprise Java Beans'); insert into topics(forumid,name,description) values(1,'Swings','Topic Swings'); insert into topics(forumid,name,description) values(1,'AWT','Topic AWT'); insert into topics(forumid,name,description) values(1,'Web Services','Topic Web Services'); insert into topics(forumid,name,description) values(1,'JMS','Topic JMS'); insert into topics(forumid,name,description) values(1,'XML,HTML','XML/HTML'); insert into topics(forumid,name,description) values(1,'Javascript','Javascript'); insert into topics(forumid,name,description) values(2,'Oracle','Topic Oracle'); insert into topics(forumid,name,description) values(2,'Sql Server','Sql Server'); insert into topics(forumid,name,description) values(2,'MySQL','Topic MySQL'); insert into topics(forumid,name,description) values(3,'CSS','Topic CSS'); insert into topics(forumid,name,description) values(3,'FLASH/DHTLML','Topic FLASH/DHTLML'); insert into topics(forumid,name,description) values(4,'Best Practices','Best Practices'); insert into topics(forumid,name,description) values(4,'Longue','Longue'); insert into topics(forumid,name,description) values(5,'General','General Discussion'); insert into threads(topicid,subject,replies,author,lastpostdate) values (1,'About Java Tutorial',2,'a@b.com','1/27/2008 02:44:29 PM'); insert into threads(topicid,subject,replies,author,lastpostdate) values (1,'Java Basics',0,'x@y.com','1/27/2008 02:48:53 PM'); insert into threads(topicid,subject,replies,author,lastpostdate) values (4,'Swings',0,'p@q.com','1/27/2008 03:12:51 PM'); insert into messages(threadid,author,date,message) values(1,'a@b.com','1/27/2008 2:44:39 PM','Where can I find Java tutorials.'); insert into messages(threadid,author,date,message) values(1,'c@d.com','1/27/2008 2:45:28 PM','Please visit www.java.sun.com'); insert into messages(threadid,author,date,message) values(1,'c@d.com','1/27/2008 2:46:41 PM','Do a Google serach for more tutorials.'); insert into messages(threadid,author,date,message) values(2,'x@y.com','1/27/2008 2:48:53 PM','Please provide some Beginner tutorials.'); insert into messages(threadid,author,date,message) values(3,'p@q.com','1/27/2008 3:12:51 PM','How many finds of layout managers are there?'); insert into messages(threadid,author,date,message) values(2,'l@m.com','2/2/2008 1:06:06 PM','Search on Google.');
I know how to select the most recent row from a database: SELECT TOP (1) Location, Date FROM Images ORDER BY Date DESC But how do I select the second to most recent? or the third most recent? or the 4th, ect, ect, ect. There must be some method to it, anyone have any suggestions?
There is a large data table called emp_history on an SQL Server, which contains the employment history of each employee. The significant columns are as follows:
entry_id employee_id start_date position
where entry_id is the primary key and auto-increments.What I need, is to create a query to extract the employee_id and position, based on the most recent record (most recent start_date) for each employee.
We have 2 Tables, tblMain, which contains unique products and tblHistory, which contains a history of the product Records are added to tblHistory daily and then the prices in tblMain are updated with those prices. The problem that we have is that since there are multiple instances of the same product in tblHistory, we're not always updating using the most recent price. Below is the current SQL that we are using.
Update TM SET TM.Price = TH.PriceHist, TM.DateUpdated = TH.DateUpdatedHist FROM tblHistory TH LEFT JOIN tblMain TM ON TH.ProdCode = TM.ProdCode
Below is a sample of data in tblHistory and the records that I would need to be used for the update.
Empid 1 has 2 entries for the date 09/01/2015 and my left join returns both of those entries. What do I need to alter to make it so that only the most recent entry is returned not both entries?
I'm trying to determine the oldest timestamp that meets given criteria which includes a specific action_type code. That code can legitimately be performed more than once on an item (all actions are recorded in an actions table, so the full history is available).
I'm having trouble getting the most recent timestamp for the given action_type I'm looking for, when that action_type has been performed more than once.
My intent with the query below is to get the most recent action_time and it's request_id that meets the criteria
SELECT TOP 1 a.action_time, r.request_id FROM requests r JOIN incident i ON r.request_id = i.request_id LEFT JOIN actions a ON r.request_id = a.request_id WHERE i.refund_type = 1 AND (r.status_code = 3 OR r.status_code = 14) AND a.action_type = 3 ORDER BY a.action_time
So for example, if the item with request_id 1334 has had action_type 3 performed on it twice, once at 2007-10-15 13:30:00 and then again at 2007-10-17 14:40:00, it's picking up the former, when I want the later. That it had action_type 3 performed on it twice is legitimate. (larger context an item was approved by a manager, then rejected by a processor, and then approved by a manager again after resubmission)
Hopefully this has made sense so far.
So, how do I make sure I'm getting the most recent action time, when I don't know if the item in particular will have more than one of this action type performed on it?
Hey guys, I have a table full of data that has duplicate records except for two date columns (date1 and date2). What I would like to do is remove the duplicates while retaining the most recent record, how can I do this?
So record 1 looks like this:
Code:
John | Smith | 08/08/2000 | 10/10/2000
Record 2 looks like this:
Code:
John | Smith | 08/10/2005 | 10/10/2005
I'd like to remove the first instance and keep the second (most recent one).
I have a table with name C1_Subscribers with three fields (1)-MobileNumber [varchar] (2)-ReceivedTime [datetime] (3)-Status [char]. Now here how to remove duplicate entry of same mobile number to MobileNumber field?
when i save this table modifying the pubid and pubcode as primary keys the following error displays...
Unable to create index 'PK_PUBS3'. CREATE UNIQUE INDEX terminated because a duplicate key was found for index ID 1. Most significant primary key is '51'. Could not create constraint. See previous errors. The statement has been terminated.
what i understand is that on the primary key duplicates are not allowed how could i allow it?
Hi, I want to know the different sources, mediums and ways using which the duplicate recoprds or adta can make an entry in our database tables. I found 4 ways for this from many articles on net that are as follows:
Duplicate data might arrive at your database via an interface to another system Data is loaded into table from other sources because during data loads, the integrity constraints are disabled Merging data from disparate systems Inheriting a poorly designed databaseBut is there any other ways also present????? Please tell me???
Hi,i am using SQL server 2005 and have a table with 4 columns.Column1 is primary key,col2 is foreign key and col3 and col4 are regular data column.When the user enters the data i want to make sure that for a given foreign key(col2),entries in col3 are not duplicated.Is there a way,i can make sure this at db level,using some kind of constraints or something?Thanks a bunch..
We have a SQL Server 6.5 table, with composite Primary Key, having the Duplicate Entry for the Key. I wonder how it got entered there? Now when we are trying to import this table to SQL2K, it's failing with Duplicate row error. Any Help?
I am wanting to create a query so that I can combine each of the found duplicates into one entry.
An example of this is:
Name |ID |Tag |Address |carNum ------------------------------------------------------- Bob Barker |2054| 52377 |235 Some road |9874 Bill Gates |5630| 69471 |014 Washington Rd. |3700 Bob Barker |2054| 97011 |235 Some road |9874 Bob Barker |2054| 40019 |235 Some road |9874 Steve Jobs |8501| 73051 |100 Infinity St. |4901 John Doe |7149| 86740 |7105 Bull Rd. |9282 Bill Gates |5630| 55970 |014 Washington Rd. |3700 Tim Boons |6370| 60701 |852 Mnt. Creek Rd. |7059
In the example above, Bob Barker and Bill gates are both in the database more than once so I would like the output to be the following:
Bob Barker |2054|52377/97011/40019|235 Some road |9874 Bill Gates |5630|69471/55970 |014 Washington Rd.|3700 Steve Jobs |8501|73051 |100 Infinity St. |4901 John Doe |7149|86740 |7105 Bull Rd. |9282 Tim Boons |6370|60701 |852 Mnt. Creek Rd. |7059
Notice how Bob Barker & Bill Gates appends the tag row (the duplicated data) into one row instead of having multiple rows. This is because I do not want to have to check the previous ID and see if it matches the current id and append to the data.
I have a form view that I am using to insert new data into a sql express database and would like to find a way to avoid attempting to insert a record if the key already exists. is there a way to do this with the formview insert command. Everything works great until I try to add a record with an already existing value in the unique key field, then it breaks.
I am using the Web Site Administration Tool with the ASP.NET login controls to create/manage user logins & roles for my site.
I have exported the ASPNETDB.MDF into my SQL Database ready to use with my app. The problem that I'm having is that whenever I add a user, using either the Web Site Administration Tool or the Classes available in the code-behind. The entry is doubled up in the database.
This is not a problem when logging on....however, when it comes to deleting a user it will only take one of the entries out and leave the duplicate in there. So if the administrator has deleted a user from the app and then tried to create another one with the same UserName (Which whomever is well within his/her rights to be able to do), they cannot because the entry which has "stay behind" in the database conflicts with the entry.
Any help on this matter would be greatly apprieciated. If any more info on this matter is required please ask (It was quite hard to try and explain this :-)
Hi all, I have one table in which one column contains duplicate values. My question is how i can use T-SQL so that i can retrive values for all columns in the table which are distinct and retriving the single value from column which contains duplicate values.
I want the output like this,it should take only Min Datecreated FormCodeRefCodeSerialnoDateTime R1-196H1-68A12232138/6/2007 19:38:14 R1-205H1-67XS23124148/6/2007 19:36:08 R1-220H1-66F433365348/6/2007 19:30:27 R1-400H1-64ER53436648/6/2007 19:24:23 R1-408H1-65TE4626268/6/2007 19:24:23
1 7530568 87143 OESCHD 1/5/2006 6:31:58 AM 1 7530568 87143 OESCHD 1/5/2006 7:02:36 AM
for each 7530568 ordernumber there should only be one OESCHD status.
This is the query I'm using to insert the data sent to me.
INSERT INTO ORDER_EVENTS SELECT d.division as division, dt.orderNum as orderNum, dt.poNum as poNum, dt.statusCode as statusCode, dt.statusChangeDate as statusChangeDate FROM dt_Order_Events dt INNER JOIN division d ON dt.division = d.divisionShort INNER JOIN status s ON s.division = d.division AND s.statCode = dt.statusCode WHERE directive <> 'C' AND dt.orderNum IN (SELECT orderNum FROM ORDER_HEADER)
This works fine when used with in the hourly transactional update. But When I ran it for the Bulk UpDate (so we'd have historical data) it allowed orders to have statuses to many times.
I am not a SQL guru, I have no idea how to write a sql statement or stored proc that will remove the duplicate records. or how to change what I have to prevent further ones.
I am having a 1st listbox which is populating production lines, 2nd combobox to populate the production units. From here , the user will be able to select multiple production units from the combobox and hence populate the variable in listbox 3.
This is the query that I'm using to query on the variable table: 'SELECT DISTINCT PU_Id,Var_Id,Var_Desc from Variables where PU_Id IN (@ProductionUnits)'
The problem now is that this would return all the variables for the selected production units and for those variables that have the same name, they would appear in the listbox as duplicates.
I wonder if there's any way to filter off or remove the duplicates in the listbox 3 by using sql query?
I am trying to get people from my table that have closed accounts. However, in my table many people have more than one account. They will have multiple closed accounts and some active accounts. I need to get the people with only closed accounts.
Values in the table
Code: name surname status Closed Number ----------- --------- ----------- ------------- ---------------------------- Jeff Burns closed 2012/01/01 142 Tina Drewmor closed 2008/05/20 546 Jeff Burns active 1900/01/01 354 Kyle Higgin active 1900/01/01 851 Tina Drewmor closed 2009/04/14 154
The query I am using so far is:
Code: select d.name, d.surname, s.status, s.closed, s.number from d d inner join s s on d.number = s.number where s.status = 'closed'
What I need to see in the results
Code: name surname status Closed Number ----------- --------- ----------- ------------ ----------------------------- Tina Drewmor closed 2008/05/20 546 Tina Drewmor closed 2009/04/14 154
I have regular work that requires me to extract a bunch of customer records from our database, and then remove duplicate address destinations (so we dont mail the same address more than once).
I can currently achieve this using a combination of my poor SQL skills and Excel, but it's really not working out for me, so looking for SQL wizardry necessary to do it just in SQL.
Relevant fields: Member.AddressBarcode (This is a unique barcode (Text representation of a base-3 number) based on the customer address. So if there's more than one record in the pulled records with the same barcode, we then look at Member.MemberTypeID to determine whether to include this record in the results or discard it as a duplicate. Note that AddressBarcode may be blank if the mailing address couldn't be validated, if it is blank we don't discard it since there is no easy way to detect duplicate addresses without the barcode)
Member.MemberTypeID (This is the type of member account. We have 3 types - Single, Joint Primary, Joint Secondary, represented in this field by the numbers 1/2/3. This is also the order of preference of who to mail. So if there is a Joint Primary and Joint Secondary with the same mailing barcode, we want to discard the Joint Secondary from the results, so that the Joint Primary is the record we include in the results of who to mail.)
Member.ID (Unique numeric ID for each customer. Kind of irrelevant here, but it's a key)
So some pseudo code for what I'm trying to achieve is:
(Member.MemberTypeID = 1) OR (Member.MemberTypeID = 2 AND Member.AddressBarcode not in results of Member.MemberTypeID = 1) OR (Member.MemberTypeID = 3 AND Member.AddressBarcode not in results of Member.MemberTypeID = 2 AND Member.AddressBarcode not in results of Member.MemberTypeID = 1)
Below is a snippet of MS SQL inside some VB that retieves Commodity info such as product names and related information and returns the results in an ASP Page. My problem is that with certain searches, elements returned in the synonym field repeat. For instance, on a correct search I get green, red, blue, and yellow which is correct. On another similar search with different commodity say for material, I get Plastic, Glass,Sand - Plastic, Glass,Sand - Plastic, Glass, Sand. I want to remove the repeating elements returned in this field. IOW, I just need one set of Plastic, Glass and Sand. I hope this makes sense.
Below is the SQL and the results from the returned page.
PS I tried to use distinct but with no luck I want just one of each in the example below.
Thanks in Advance!
Scott
==============================
SQL = "" SQL = "SELECT B.CIMS_MSDS_NUM," & _ "A.COMMODITY_NUMBER, " & _ "B.CIMS_TRADE_NME," & _ "B.CIMS_MFR_NME," & _ "B.CIMS_MSDS_PREP_DTE," & _ "B.APVL_CDE," & _ "COALESCE(C.REGDMATLCD,'?') AS DOTREGD," & _ "COALESCE( D.CIMS_TRADE_SYNM,'NO SYNONYMS') AS SYNONYM, " & _ "A.MSDS_CMDTY_VERIF, " & _ "A.CATALOG_ID " & _ "FROM ( MATEQUIP.VMSDS_CMDTY A " & _ " RIGHT OUTER JOIN MATEQUIP.VCIMS_TRD_PROD_INF B " & _ " ON A.CIMS_MSDS_NUM = B.CIMS_MSDS_NUM " & _ " LEFT OUTER JOIN MATEQUIP.VDOT_TRADE_PROD C " & _ " ON A.CIMS_MSDS_NUM = C.MSDSNUM " & _ " LEFT OUTER JOIN MATEQUIP.VCIMS_TRD_PROD_SYN D " & _ " ON B.CIMS_MSDS_NUM = D.CIMS_MSDS_NUM) "
hi All, I have to remove non-useful and duplicate records containing NULL , Blanks and extra spaces (either on left or right side of the column values) etc from all the tables in my server's DB XYZ weekly thru a a scheduled job with the help of a Stored Proc, that s i guess called Purging og DB. Plz help how i can do it with T-SQL.
Also i have to find out and remove all the duplicate DB objects(tables) from the DB .e.g. a table existing with name TABLE_TEST or TABLE_DEBUG etc for an original table TABLE , making sure no any of the base table is dropped.
I have a stored procedure that returns a single row based on a parameter of employee ID. This particular procedure uses a CTE to traverse our org structure. One of the columns is returning a delimited string of Windows login values and due to the business rules, it can contain duplicate values. I need to have that column contain only unique values - no dupes.
For example, this one column could contain something like this:
Hi,Say I have a table Job with columns name, date, salary . I want to getthe name ,date and salary for the date when that person earned maximumsalary. I am using something likeSELECT X.name,X.date,X.salaryFROM job XWHERE X.salary IN(SELECT MAX(Y.salary) FROM job Y where Y.name= X.name);The problem is ; if a person earns maximum salary on two dates, both ofthe dates are printed. I just want to get any one of those two rows.I triedSELECT X.name,Min(X.date),X.salaryFROM job XWHERE X.salary IN(SELECT MAX(Y.salary) FROM job Y where Y.name= X.name);but it gives error.Can anybody please suggest a solution?Regards,Aamir
I need write a query for removing duplicates, for Example in my table I have columns
A_ID name id 1 sam 10 2 sam 10 3 sam 10 4 sam 10 5 ccc 15 6 ccc 15 7 ccc 15 8 fff 20 9 fff 20 10 fff 20
So now I have duplicates values in id column so now I need to take only one value of each and delete the remaining. I need to take first id value 10,15,20 so only 3 rows should be there in my table.
