I have two datatables in my database. The first table, named Books, has two columns: BookID and Author (BookID is the primary key). The second table, named Purchases, has three columns: PurchaseID, BookID, BuyerID (Purchase ID is the primary key).
The idea here is that the Books datatable contains information regarding the book and its author while the Purchases datatable contains information on who has purchased what book.
Now, say I want to write an SQL query to extract a list of all the authors who have written a book purchased by buyer X. How would I go about doing this without having any duplicate entries? I figured that the following would work:
SELECT DISTINCT * FROM Books INNER JOIN Purchases ON Books.BookID=Purchases.BookID
But this ends up generating duplicate BookIDs if the Purchases table contains several buyers who have bought that Book. I know I could use BookID rather than * in the above query and that would work, but in reality I'm dealing with more complex tables and I would rather keep the * in there to actually get all the data out in one go.
hi guys i have a query that contains several table joins when i run the query without select distinct x,y,z,w,.. or order by docno it takes around 20 second to finish execution, when i add select distinct x,y,z,w,.. or order by docno it ruturns the same result in just 2 seconds is adding distict keyword or order by acts as an index for the query or what ?
. . . .
here is my query :
SELECT distinct p.indocno,p.CHAR_FIELD2_AR, p.CHAR_FIELD1, p.REVISION_NO, CAST(p.INDOCNO AS int) AS INDOCNO, p.CHAR_FIELD3, p.CHAR_FIELD7_AR, T.DESCRIPTION,J.DESCRIPTION AS [Section], p.SUBJECT FROM dbo.TECHNICAL_MAIN p INNER JOIN (SELECT MAX(revision_no) d, char_field1 c, char_field2_ar e, subcat_id j FROM technical_main m WHERE revision_no IN ('0', '1', '2') GROUP BY char_field1, char_field2_ar, subcat_id) b ON p.REVISION_NO = b.d AND p.CHAR_FIELD1 = b.c AND p.CHAR_FIELD2_AR = b.e AND p.REVISION_NO IN ('0', '1', '2') INNER JOIN dbo.CUST_HIERARCHY_LOOKUP T ON p.CHAR_FIELD7_AR = T.ID INNER JOIN dbo.CUST_HIERARCHY_LOOKUP J ON p.CHAR_FIELD3_AR = J.ID AND p.SUBCAT_ID = b.j
Let's say i have a database with the following structure and datatablename: customerscustomerID| customername | PictureID|1 | MyCustomer | 1.jpg |1 | MyCustomer | 1_1.jpg |1 | MyCustomer | 1_3.jpg |2 | MyCustomer2 | 2.jpg |3 | MyCustomer3 | 3.jpg |3 | MyCustomer3 | 3_2.jpg |4 | MyCustomer4 | 4_2.jpg |4 | MyCustomer4 | 4_1.jpg |Is it possible to pull back only one entry per customer? I don't carewhich Picture ID it uses. I would perfer if the query would return thetopmost PictureID for a customer, but i don't really care.desired outputcustomerID| customername | PictureID|1 | MyCustomer | 1.jpg |2 | MyCustomer2 | 2.jpg |3 | MyCustomer3 | 3.jpg |4 | MyCustomer4 | 4_2.jpg |I have tried using the DISTINCT keyword, but it does not really helpme. my original thought was to use..."Select Distinct CustomerID, Customername from Customers" but then idon't have access to the PictureID? can i use a sub query?
Hello everyone, I'm working on a SQL statement that I "thought" worked fine until I noticed I was getting a duplicate row. Below is the SQL statement from the stored procedure: SELECT DISTINCT number AS 'RteNum', leg_orig AS 'Origin', leg_dest AS 'Dest', AcEquipment.EquipmentDesc AS 'EquipType', SUBSTRING(trailer_option, 1, 1) AS 'TrailerOption', leg_depart_time_local AS 'DeptTime', leg_arrive_time_local AS 'ArrTime', dev.fnConvertEffectiveDaysToDaysOfWeek(SUBSTRING(leg_effective_local, 2 ,7)) AS 'EffectiveDays', TruckEditor.EffectiveDays as 'NewEffectiveDays' FROM lhif_prod JOIN AcEquipment ON AcEquipment.EquipmentType = lhif_prod.Equipment_Type LEFT JOIN dev.TruckEditor ON TruckEditor.Origin = lhif_prod.leg_orig AND TruckEditor.Dest = lhif_prod.leg_dest AND TruckEditor.RouteNum = lhif_prod.number AND TruckEditor.DeptDate = lhif_prod.leg_depart_date_local WHERE leg_depart_date_local BETWEEN @DateStart AND @DateEnd AND Type_Code = 'T' AND leg_orig = @LocID ORDER BY RteNum, Dest, DeptTime Here is what comes back from this query:ABE00 ABEA ABER CTV5 H 1855 1915 MTWT--- NULLABE01 ABEA ABER CTV5 H 1941 2001 MTWT--- NULLABE02 ABEA ABER CTV5 H 2045 2105 MTWTF-- NULLABE03 ABEA ABER CTV5 H 2059 2119 MTWTF-- NULLABE04 ABEA ABER CTV2.5 H 2245 2305 MTWTF-- NULLABE11 ABEA ABER WALKIN H 2045 2100 MTWTF-- NULLABE11 ABEA ABER WALKIN H 2045 2100 MTWTF-- MT-TF--ABE12 ABEA ABER WALKIN H 2109 2124 MTWTF-- NULLEF038 ABEA EWRHB 53BULK H 0100 0245 -TWTFS- NULLEF085 ABEA EWRHA CTV5 H 1955 2140 MTWT--- NULLEF106 ABEA EWRHB CTV5 H 1901 2046 -----S- NULLEF140 ABEA ABER CTV5 H 0550 0610 M------ NULLEF166 ABEA EWRRA CTV5 H 2230 0010 MTWT--- NULLEF366 ABEA EWRRA CTV5 H 2230 0010 ----F-- NULLEF543 ABEA EWRRA CTV5 H 2200 2345 MTWTF-- NULL The 2 rows in bold are the issue right now. There should only be 1 row (the 2nd one where the last column is not null). I'm not sure why it returns both columns when I'm doing a join on there to add that last column. Can anyone help me out with this? I'm not very strong in SQL, so if I'm overlooking something, I'd appreciate any help you can provide. Thanks.
INSERT INTO #LatLong SELECT DISTINCT Latitude, Longitude FROM RGCcache
When I run it I get the following error: "Violation of PRIMARY KEY constraint 'PK__#LatLong__________7CE3D9D4'. Cannot insert duplicate key in object 'dbo.#LatLong'."
Im not sure how this is failing as when I try creating another table with 2 decimal columns and repeated values, select distinct only returns distinct pairs of values.
The failure may be related to the fact that RGCcache has about 10 million rows, but I can't see why.
I need to run a SELECT DISTINCT query acrossmultiple fields, but I need to add another field that is NON-DISTINCTto my record set.Here is my query:SELECT DISTINCT lastname, firstname, middleinitial, address1,address2, city, state, zip, age, genderFROM gpresultsWHERE age>='18' and serviceline not in ('4TH','4E','4W')and financialclass not in ('Z','X') and age not in('1','2','3','4','5','6','7','8','9','0')and (CAST (ADMITDATE AS DATETIME) >= DATEDIFF(day, 60, GETDATE()))ORDER BY zipThis query runs perfect. No problems whatsoever. However, I need toalso include another field called "admitdate" that should be treatedas NON-DISTINCT. How do I add this in to the query?I've tried this but doesn't work:SELECT admitdateFROM (SELECT DISTINCT lastname, firstname, middleinitial, address1,address2, city, state, zip, age, gender from gpresults)WHERE age>='18' and serviceline not in ('4TH','4E','4W')and financialclass not in ('Z','X') and age not in('1','2','3','4','5','6','7','8','9','0')and (CAST (ADMITDATE AS DATETIME) >= DATEDIFF(day, 60, GETDATE()))ORDER BY zipThis has to be simple but I do not know the syntax to accomplishthis.Thanks
Hello, I have written a small asp.net application, which keeps record of the proposals coming from the branch offices of a bank in a tableCREATEd as a TABLE Proposals ( ID smallint identity(7,1), BranchID char(5), Proposal_Date datetime ) This app also calculates the total number of proposals coming from a specific branch in a given date bySELECTing COUNT(BranchID) FROM Proposals WHERE BranchID=@prmBranchID AND Proposal_Date=@prmDateand prints them in a table (my target table). This target table has as many rows as the result of the "SELECT COUNT( DISTINCT Proposal_Date ) FROM Proposals"and excluding the first column which displays those DISTINCT Proposal_Dates, it also has as many columns as the result of the"SELECT DISTINCT BranchID FROM Proposals". This target table converts the DateTime values ToShortDateString so that we are able to see comfortably which branch office has sent how many proposals in a given day. So far so good, and everything works fine except one thing: Certain DateTime values in the Proposals table which are of the same day but of different hours (for ex: 11.11.2005 08:30:45 and11.11.2005 10:45:30) cause some trouble in the target table, where "SELECT COUNT( DISTINCT Proposal_Date ) FROM Proposals" is executed, because (as you might already guess) it displays two identical dates in ShortDateString form, and this doesn't make much sense (i.e. it causes redundant rows) What I need to do is to get a result like (in a neat fashion :) "SELECT COUNT( DISTINCT Proposal_Date ) <<DISTINCT ONLY IN THE DAYS AND NOT IN HOURS OR MINUTES OR SECONDS>> FROM Proposals" So, how to do it in a suitable way? Thanks in advance.
What I am trying to create a query to check, If recDT is not value or null, then will use value from SELECT top 1 recDtim FROM Serv. Otherwise, will use the value from recDT. I have tried the below query but it doesn't work. The error says, Incorrect syntax near the keyword 'SELECT'.Incorrect syntax near the keyword 'else'.1 SELECT 2 case when recDT='' then SELECT top 1 recDtim FROM Serv else recDT end 3 FROM abc 4 Anyone can help? Thanks a lot.
I am trying to pass several ids to use in a where clause. 1 For Each row as GridViewRow In gv_child.Rows 2 If row.RowType = DataControlRowType.DataRow Then 3 Dim chk as CheckBox = CType(row.FindControl("cb_Approve"),CheckBox) 4 If chk IsNot Nothing AndAlso chk.Checked Then 5 Dim id As Integer = CInt(CType(row.FindControl("lbl_id"),Label).Text) 6 ids &= "," & id 7 End If 8 End If 9 If ids.Length > 1 Then ids = ids.Substring(1) 10 'Submit to sql with ids as param... 11 Next
I am getting an exception. Error converting '38,39' to a column of datatype int. What am I doing wrong?
I am trying to implement a band search on my web site (concert listings) and would like it to behave a bit more intelligently than a standard match on the band name. At the moment I have a stored procedure that just selects every show that features a band with exactly the same name as the search term. What I'm now trying to do is when the user enters a band name containing the '&' character I would also like to search using the word and 'and'. For example, if they search for 'Rise & Fall', they should get details on all shows featuring 'Rise & Fall' OR 'Rise And Fall'. Is it possible to do this within my stored procedure?
Greetings, I am a php developer, and running a little bit out of deadline in a project. Can someone provide me with a VERY simple way to implement search by keyword in C#? I have already implemented a search page (according to firstname, lastname etc) that works on a drop down menu (where you have the option to choose seach by keyword) . So, I need to change something in my SQL query to make this work. I already knew from my SQL experience that the simplest and probably the SLOWEST and MOST UN EFFICIENT one was using LIKE. I don't mind using it but I can't since I will end up having something close to that: SELECT * FROM users WHERE keyword_entered LIKE @keyword; (or '@keyword) which does not work. however SELECT * FROM users WHERE keyword_entered LIKE 'somename%'; does work! I guess the trick is in putting the % after the keyword. ( I would have done that in php by putting the entered keyword in a string and than add to it % and pass it to the SQL query and I dunno how to do that in .NET)any ideas?
Hi everyone, I have a few classes representing my data layer for my ASP.Net 2.0 Web Application. For example, UserDAL, DocumentDAL, etc... All these classes derive from BaseDAL, which stores the SqlConnection in it. The DAL classes access it through a property. The property is defined like that: private SqlConnection connection;public SqlConnection Connection{get{ if (connection == null) connection = new SqlConnection(); if (connection.State != ConnectionState.Open) { connection.ConnectionString = ConnectionString; connection.Open(); } return connection;}} The constructor of each DAL class is overloaded and takes a SqlConnection object. So if I need to access two DAL classes, I pass the connection of the first, to the second to prevent opening and closing the connection again and again. Here is a sample: UserDAL userDAL = new UserDAL(); userDAL.DoSomethingAndAccessConnectionProperty();
// Now userDAL.Connection is opened. Pass the connection to the constructor of DocumentDAL DocumentDAL documentDAL = new DokumentDAL(userDAL.Connection); documentDAL.AlsoDoSomething(); So, if I do the following:using (UserDAL userDAL = new UserDAL()) { userDAL.DoSomethingAndAccessConnectionProperty();
DocumentDAL documentDAL = new DokumentDAL(userDAL.Connection); documentDAL.AlsoDoSomething(); } I assume that the connection is removed from memory, even if the DocumentDAL class has also used it. Am I right? I want to be sure that there will be no open connections.Thanks
I have a sample photo database where we have added keywords to search for photos. I wanted a way to list all of the keywords that are in the database individually. The problem is in my keyword field there are many keywords seperated by a comma.
Ex: "bull, barrel, rodeo, western, cowboy" would in the keyword field for one photo.
I wanted to select distinct all of the individual words from each keyword field in all of the records.
I heard a claim recently at a SQL Server users group meeting that theTOP keyword forces sorting on a database server. I can't find anyreason this might be true and the Books Online say nothing about it.Can someone verify this claim one way or the other?
I am studying for the MSCE/MCDBA exam 70-229. In the book I am using("MCSA/MCSE/MCDBA Self-Paced Training Kit: Microsoft SQL Server 2000Database Design and Implementation Exam 70-229, Second Edition") I amlooking at the section on the ANY/ALL keyword.<QUOTE>USE PubsSELECT TitleFROM TitlesWHERE Advance > ANY(SELECT AdvanceFROM Publishers INNER JOIN TitlesON Titles.Pub_id = Publishers.Pub_idAND Pub_name = 'Algodata Infosystems')This statement finds the titles that received an advance larger thanthe minimum advance amount paid by Algodata Infosystems (which, in thiscase, is $5,000). The WHERE clause in the outer SELECT statementcontains a subquery that uses a join to retrieve advance amounts forAlgodata Infosystems. The minimum advanceamount is then used to determine which titles to retrieve from theTitles table.</QUOTE>I don't understand why this references the "minimum advance". If yourun the subquery on its own, it returns the following values:5000.00005000.00005000.00007000.00008000.0000NULL[color=blue]>From my limited understanding, the "ANY" keyword applies to at least[/color]one value, but which one? How is this determined?Any help gratefully received.Edward--The reading group's reading group:http://www.bookgroup.org.uk
I am in the process of importing an Oracle database into SQL Server.Once of the tables has a field called "EXEC".SQL Server seems to reject any queries that include that particularfield because EXEC is a keyword. For eg.SELECT ID, EXEC from USERSresults in a syntax error near keyword EXEC.I can't change the fieldname becuase it will require reworking of awhole bunch of scripts.What can I do to adjust the query?Bijoy
Is possible in SQLSERVER to use a syntax like this?select x,y from table_1 where (x,y) not in (select h,k from table_2)I've tried, but it doen't work.Do you know any workaround?Thank youFede
I've been trying to figure out the usage of "Nothing" as the scope parameter, and the more I try, the more I can confused.
It says on the RDL spec:
"For expressions inside data regions:
.......
Specifying the keyword Nothing as the scope is equivalent to specifying the outermost data region containing the report item in which the aggregate is used."
It seems that what's it saying is that if I have an expression in a table as = last(somefield, "the name of the table") is the same as = last(somefield,Nothing) But, apparently it;s not. (I tried last, first,sum, count,CountRows, min, max...........) it doesn't matter where I put "=last(somefield,Nothing)" in the table (i tried table header,footer, detail, and table group header, footer), none of them worked. and I tried it everywhere in matrix, in charts. It's just not working. It always complains about the invalid scope not being the containing data region, containing grouping or dataset name.
However, the only way I get the "Nothing" as the scope to work is in a RunningValue function, not in any other aggregate funcitons.
Anyone help me with this, please... I need a complete definition on the usage of Nothing as scope.
where Description and Description2 are text datatypes.
I'm trying to return all records where myKeyword exists as a singular word in either of these two fields.
Should I create a child table where each word in each of these fields has its own row for each product and query against that or is there an efficient way of querying this result without creating the extra child table?
I'm using an application that is generating some SQL scripts for SQL Server 2005. I'm trying tweak it so that I can run it on SQL Server 2000.
The line that I'm having trouble with is:
CREATE INDEX FKFFF41F9960601995 ON alf_access_control_entry (permission_id);(optional)
The key word "(optional)" is causing trouble. I understand this keyword, when used in SQL Server 2005, let's the script continue and complete when errors are detected.
What is the alternative syntax to use in SQL Server 2000?
Hello there. I'm developing an eCommerce solutions based on the ASP.NET 2.0 Commerce Starter Kit, architechture. It uses the Provider Pattern. In my web-application, i use the CatalogProvider, to retrieve data from a SQL Server 2005 database. I call the methods through a handler class, whoch excists inside the WebApp. I also use a ShoppingCartProvider, OrdersProvider, ShippingProvider etc. in the same way. In my Web.Config file, i have all the provers listed, and on each provider, the name of the connectionString to use are given. My connection string looks like this:"connString" connectionString="Server=xxxx;Database=xxxx;Trusted_Connection=True;" providerName="System.Data.SqlClient" /> The problem is, that suddently, when browsing the website, that connects to the database through the providers, i get this error: Keyword not supported: ',server'. 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.ArgumentException: Keyword not supported: ',server'.Source Error:
Line 31: public static IDataReader GetProductsByCategory(int categoryID) Line 32: { Line 33: return Commerce.Providers.CatalogProvider.Instance.GetProductsByCategory(categoryID); Line 34: } Line 35: Source File: d:DevelopmentASPNETSeoShopApp_CodeHandlersCatalogManager.cs Line: 33 Stack Trace: If i then go back to my web.config file, and removes the providerName section, of the connectionString, the website works again, for a short period. When the error return, i undo the deletion of the providerName, and it will work again... For a short time... I've also tried to use another connectionsString, like this:Data Source=Aron1;Initial Catalog=pubs;Integrated Security=SSPI But then the keyword which is not supported is: ', data source'
Does anyone know what the issue might be? Thanks in advance...
I am using the top keyword as follows in the same SP. The select and the update statements are one below the other: Select TOP(1) col1,col2 from table1 where col3='val1' Update TOP(1) table1 set col2= 'val2' where col3='val3' There is a primary key on the column which is not included in either the select or the update statement. Can anyone confirm that the both the statments will return the same row?
Hi,I have written a stored procedure to add the records to the table in DB from the report I generate, but the sored procedure gives me this error:Incorrect syntax near the keyword 'ELSE'.I am using Sql Server 2005.SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOALTER PROCEDURE [dbo].[spCRMPublisherSummaryUpdate]( @ReportDate smalldatetime, @SiteID int, @DataFeedID int, @FromCode varchar, @Sent int, @Delivered int, @TotalOpens REAL, @UniqueUserOpens REAL, @UniqueUserMessageClicks REAL, @Unsubscribes REAL, @Bounces REAL, @UniqueUserLinkClicks REAL, @TotalLinkClicks REAL, @SpamComplaints int, @Cost int)ASDECLARE @PKID INTDECLARE @TagID INTSELECT @TagID=ID FROM Tag WHERE SiteID=@SiteID AND FromCode=@FromCode SELECT @PKID=PKID FROM DimTag WHERE TagID=@TagID AND StartDate<=@ReportDate AND @ReportDate< ISNULL(EndDate,'12/31/2050')IF @PKID IS NULL BEGIN SELECT TOP 1 @PKID=PKID FROM DimTag WHERE TagID=@TagID AND SiteID=@SiteIDENDDECLARE @LastReportDate smalldatetime, @LastSent INT, @LastDelivered INT, @LastTotalOpens Real, @LastUniqueUserOpens Real, @LastUniqueUserMessageClicks Real, @LastUniqueUserLinkClicks Real, @LastTotalLinkClicks Real, @LastUnsubscribes Real, @LastBounces Real, @LastSpamComplaints INT, @LastCost INT SELECT @Sent=@Sent-Sent,@Delivered=@Delivered-Delivered,@TotalOpens=@TotalOpens-TotalOpens,@UniqueUserOpens=@UniqueUserOpens-UniqueUserOpens,@UniqueUserMessageClicks=@UniqueUserMessageClicks-UniqueUserMessageClicks,@UniqueUserLinkClicks=@UniqueUserLinkClicks-UniqueUserLinkClicks,@TotalLinkClicks=@TotalLinkClicks-TotalLinkClicks,@Unsubscribes=@Unsubscribes-Unsubscribes,@Bounces=@Bounces-Bounces,@SpamComplaints=@SpamComplaints-SpamComplaints,@Cost=@Cost-Cost FROM CrmPublisherSummary WHERE @LastReportDate < @ReportDate AND SiteID=@SiteID AND TagPKID=@PKIDUPDATE CrmPublisherSummary SET Sent=@Sent, Delivered=@Delivered, TotalOpens=@TotalOpens, UniqueUserOpens=@UniqueUserOpens, UniqueUserMessageClicks=@UniqueUserMessageClicks, UniqueUserLinkClicks=@UniqueUserLinkClicks, TotalLinkClicks=@TotalLinkClicks, Unsubscribes=@Unsubscribes, Bounces=@Bounces, SpamComplaints=@SpamComplaints, Cost=@Cost WHERE ReportDate=@ReportDate AND SiteID=@SiteID AND TagPKID=@PKIDELSE SET NOCOUNT ON INSERT INTO CrmPublisherSummary( ReportDate, SiteID, TagPKID, Sent, Delivered, TotalOpens, UniqueUserOpens, UniqueUserMessageClicks, UniqueUserLinkClicks, TotalLinkClicks, Unsubscribes, Bounces, SpamComplaints, Cost, DataFeedID, TagID) SELECT @ReportDate, @SiteID, @PKID, @Sent, @Delivered, @TotalOpens, @UniqueUserOpens, @UniqueUserMessageClicks, @UniqueUserLinkClicks, @TotalLinkClicks, @Unsubscribes, @Bounces, @SpamComplaints, @Cost, @DataFeedID, @TagIDSET NOCOUNT OFF
I am displaying advertisers on a dynamic .net page that users will view via querystrings from a county page, then a city page , as they can pick a zone , then view the advertiser's ad predicated on the zone they pick. I want to have advertisers on a premium plan that can be viewed in all areas of the city, regardless what zone the user picks. Trying the below does not suffice my resultset (the queriedzone is a variable as the request.querystring for the zone ; 'all' is the indicator for an advertiser who should be seen in all zones)
sqlstr = "select company, address, email from advertisers where zone IN ('" + queriedzone + "','all') " ??? thanks in advance ed
HiI am getting the following error on my Select statement: Incorrect syntax near the keyword 'AS'. SELECT [A], [B], [C], [D], [E], [F], [G], [H], [I], [J], [K], RowFROM(SELECT ROW_NUMBER() OVER (ORDER BY [J] DESC)AS Row, [A], [B], [C], [D], [E], [F], [G], [H], [I], [J], [K]FROM [TABLE]WHERE (([A] LIKE '%' + @A+ '%') OR ([K] LIKE '%' + @K+ '%')) AS LogWithRowNumbersWHERE (Row >=91 AND Row <= 100) I used the following select statement as a template (which works fine): SELECT [A], [B], [C], [D], [E], [F], [G], [H], [I], [J], [K], [L], Row
FROM (SELECT ROW_NUMBER() OVER (ORDER BY [H] DESC) AS Row, [A], [B], [C], [D], [E], [F], [G], [H], [I], [J], [K], [L] FROM [TABLE]
WHERE (([J] = @J) AND ([E] >= @E)) AND (([K] < [L]) OR (([K] = 0) AND ([L] = 0)))) AS LogWithRowNumbers WHERE (Row >= 82 AND Row <= 90) What is the difference that would make one work and the other not work?Thanks if you can help,Jon
