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  • MySQL GROUP BY and JOIN

    - by christian
    Guys what's wrong with this SQL query: $sql = "SELECT res.Age, res.Gender, answer.*, $get_sum, SUM(CASE WHEN res.Gender='Male' THEN 1 else 0 END) AS males, SUM(CASE WHEN res.Gender='Female' THEN 1 else 0 END) AS females FROM Respondents AS res INNER JOIN Answers as answer ON answer.RespondentID=res.RespondentID INNER JOIN Questions as question ON answer.Answer=question.id WHERE answer.Question='Q1' GROUP BY res.Age ORDER BY res.Age ASC"; the $get_sum is an array of sql statement derived from another table: $sum[]= "SUM(CASE WHEN answer.Answer=".$db->f("id")." THEN 1 else 0 END) AS item".$db->f("id"); $get_sum = implode(', ', $sum); the query above return these values: Age: 20 item1 0 item2 1 item3 1 item4 1 item5 0 item6 0 Subtotal for Age 20 3 Age: 24 item1 2 item2 2 item3 2 item4 2 item5 1 item6 0 Subtotal for Age 24 9 It should return: Subtotal for Age 20 1 Subtotal for Age 24 2 In my sample data there are 3 respondents 2 are 24 yrs of age and the other one is 20 years old.

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  • Django Haystack exact filtering

    - by blackrobot
    I have a haystack search which has the following SearchIndex: class GrantIndex(indexes.SearchIndex): """ This provides the search index for the Grant application. """ text = indexes.CharField(document=True, use_template=True) year = indexes.IntegerField(model_attr='year__year') date = indexes.DateField(model_attr='date') program = indexes.CharField(model_attr='program__area') grantee = indexes.CharField(model_attr='grantee') amount = indexes.IntegerField(model_attr='amount') site.register(Grant, GrantIndex) If I want to search filtering out any programs that ARE NOT 'Health', I run the following query: from haystack.query import SearchQuerySet sqs = SearchQuerySet() sqs = sqs.filter(program='Health') Unfortunately, this also produces objects from the program 'Health\Other' and 'Health\Cardiovascular'. How do I stop the search from allowing those other programs in? I run Ubuntu 9.10 with Xapian as my search back-end.

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  • Why is my mysql database timestamp changing by itself?

    - by Scarface
    Hey guys quick question, I have an entry that I put in my database, and as I echo the value, the value in the database stays the same while the data echoed keeps increasing, which is messing up my function. If anyone knows whats going down, would appreciate any suggestions. <?php include("../includes/connection.php"); $query="SELECT * FROM points LEFT JOIN users ON points.user_id=users.id WHERE points.topic_id='82' AND users.username='gman'"; $check=mysql_query($query); while ($row=mysql_fetch_assoc($check)){ $points_id=$row['points_id']; echo $timestamp=$row['timestamp']; } ?>

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  • C# and MySQL .NET Connector - Any way of preventing SQL Injection attacks in a generic class?

    - by John M
    My idea is to create some generic classes for Insert/Update/Select via a C# (3.5) Winforms app talking with a MySQL database via MySQL .NET Connector 6.2.2. For example: public void Insert(string strSQL) { if (this.OpenConnection() == true) { MySqlCommand cmd = new MySqlCommand(strSQL, connection); cmd.ExecuteNonQuery(); this.CloseConnection(); } } Then from anywhere in the program I can run a query with/without user input by just passing a SQL query string. Reading around on SO is starting to give me the indication that this may lead to SQL injection attacks (for any user-input values). Is there anyway of scrubbing the inputted strSQL or do I need to go and create individual parameterized queries in every method that needs to do a database function?

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  • Return pre-UPDATE column values in PostgreSQL without using triggers, functions or other "magic"

    - by Python Larry
    I have a related question, but this is another part of MY puzzle. I would like to get the OLD VALUE of a Column from a Row that was UPDATEd... WITHOUT using Triggers (nor Stored Procedures, nor any other extra, non-SQL/-query entities). The query I have is like this: UPDATE my_table SET processing_by = our_id_info -- unique to this instance WHERE trans_nbr IN ( SELECT trans_nbr FROM my_table GROUP BY trans_nbr HAVING COUNT(trans_nbr) > 1 LIMIT our_limit_to_have_single_process_grab ) RETURNING row_id If I could do "FOR UPDATE ON my_table" at the end of the subquery, that'd be devine (and fix my other question/problem). But, that won't work: can't have this AND a "GROUP BY" (which is necessary for figuring out the COUNT of trans_nbr's). Then I could just take those trans_nbr's and do a query first to get the (soon-to-be-) former processing_by values. I've tried doing like: UPDATE my_table SET processing_by = our_id_info -- unique to this instance FROM my_table old_my_table JOIN ( SELECT trans_nbr FROM my_table GROUP BY trans_nbr HAVING COUNT(trans_nbr) > 1 LIMIT our_limit_to_have_single_process_grab ) sub_my_table ON old_my_table.trans_nbr = sub_my_table.trans_nbr WHERE my_table.trans_nbr = sub_my_table.trans_nbr AND my_table.processing_by = old_my_table.processing_by RETURNING my_table.row_id, my_table.processing_by, old_my_table.processing_by But that can't work; "old_my_table" is not viewable outside of the join; the RETURNING clause is blind to it. I've long since lost count of all the attempts I've made; I have been researching this for literally hours. If I could just find a bullet-proof way to lock the rows in my subquery - and ONLY those rows, and WHEN the subquery happens - all the concurrency issues I'm trying to avoid disappear... UPDATE: [WIPES EGG OFF FACE] Okay, so I had a typo in the non-generic code of the above that I wrote "doesn't work"; it does... thanks to Erwin Brandstetter, below, who stated it would, I re-did it (after a night's sleep, refreshed eyes, and a banana for bfast). Since it took me so long/hard to find this sort of solution, perhaps my embarrassment is worth it? At least this is on SO for posterity now... : What I now have (that works) is like this: UPDATE my_table SET processing_by = our_id_info -- unique to this instance FROM my_table AS old_my_table WHERE trans_nbr IN ( SELECT trans_nbr FROM my_table GROUP BY trans_nbr HAVING COUNT(*) > 1 LIMIT our_limit_to_have_single_process_grab ) AND my_table.row_id = old_my_table.row_id RETURNING my_table.row_id, my_table.processing_by, old_my_table.processing_by AS old_processing_by The COUNT(*) is per a suggestion from Flimzy in a comment on my other (linked above) question. (I was more specific than necessary. [In this instance.])

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  • How do you write "Select (all) From (table) Where posting=$posting except this posting? (Mysql)

    - by ggfan
    I want to write a Mysql statement that selects all from a table(posting) where title is like $title except for the title of $title. Basically I want to display all related posting of a certain posting. I want the query to select all the postings in the table that has the title name in the title and detail. But I don't want the posting to display in the related postings. $query="Select * From posting Where title,detail, like %$title% except $title"; how do I write the except part?

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  • rails: include statement with two ON conditions

    - by Markus
    Hi, I have tree tables books bookmarks users where there is a n to m relation from books to users trough bookmarks. Im looking for a query, where I get all the books of a certain user including the bookmarks. If no bookmarks are there, there should be a null included... my sql statement looks like: SELECT * FROM `books` LEFT OUTER JOIN `bookmarks ` ON bookmarks.book_id = books.id AND bookmarks.user_id = ? In rails I only know the :include statement, but how can I add the second bookmarks.user_id = ? statement in the ON section of this query? if I put it in the :conditions part, no null results would get returned! Thanks! Markus

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  • C# MySQL Lost Connection

    - by Adam
    Hi. I have C# application and I'm using MySQL database. Everything seems to be fine except one thing. Our computer network is little bit unstable. When I'm trying to execute query and the computer simultaneously loses connection to the mysql server (I'm simulating this situation by unplugging the network cable from computer which is mysql server), the program is trying to do something for long time (tens seconds). I would like to specify something like timeout which ends the query by exception or something similar. I tried to add timeout parameters to connection string but with no effect (I've used ConnectionTimeout and DefaultCommandTimeout). Is there any other way to identify lost connection after few seconds? Thank you Adam P.S. Sorry for my english, I'm not native speaker.

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  • HTTP Builder/Groovy - get source text _and_ XmlSlurper output?

    - by Misha Koshelev
    Dear All: I am reading here: http://groovy.codehaus.org/modules/http-builder/doc/get.html I seem to be able to get i) XMLSlurper output as parsed by NekoHTML using: def http = new HTTPBuilder('http://www.google.com') def html = http.get( path : '/search', query : [q:'Groovy'] ) ii) Raw text using: http.get( path : '/search', contentType : TEXT, query : [q:'Groovy'] ) { resp, reader -> println "response status: ${resp.statusLine}" println 'Headers: -----------' resp.headers.each { h -> println " ${h.name} : ${h.value}" } println 'Response data: -----' System.out << reader println '\n--------------------' } I am having some trouble and would like to get BOTH (i) and (ii) to debug my XmlSlurper code on the actual html I am getting. Any suggestions how I might go about doing this? I can easily instantiate an XmlSlurper object with the relevant string using the parseString(string) method or the parse(reader) method, but I cannot seem to get the Neko processing step correct. Any hints? Thank you! Misha

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  • XPATH - Select all child nodes with a specific attribute

    - by David
    Hi, what would be the xpath for the following: Find all child nodes with a specific attibute value but starting from a node with a specific attribute value. This is kind of related to a question I posted earlier about parsing and rdf xml file - I thought I had solved it but not quite yet. For example I am trying to parse and grab all of the rdf:about attribute values. I have this working fine. I need to add the following condition though - parsing needs to start after a specific rdf:about value is found. I am working in php and and using DomDocument and am using the following xpath query: $xpath-query('//@rdf:about') - it is finding all rdf:about attributes fine. I need to extend this to only find thos attributes that come after the node who rdf:about attribute is equal to something. Hope this makes sense.

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  • Get children count via HQL

    - by Thomas Lötzer
    Hi, I have a one-to-many mapping between a parent entity and child entities. Now I need to find the number of children associated with each parent for a list of parents. I am trying to do this with HQL but I am not sure how I can get the list of parents in there. Also, I don't know how I can return the entity itself and not just its ID. My current HQL query is: select new map(parent.id as parentId, count(*) as childCount) from Parent parent left join parent.children children group by parent.id but this only returns the ID and does not filter on specific parents. EDIT Based on Pascal's answer I have modified the query to select new map(parent as parent, count(elements(parent.children)) as childCount) from Parent parent group by parent That does work, but is prohibitively slow: 30 seconds instead of 400 ms on the same database.

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  • Perl TDS character sets

    - by skiphoppy
    I'm using the FreeTDS driver with DBD::Sybase, connecting to an MS SQL Server. When I query certain values of certain records, I get this error: DBD::Sybase::st fetchrow_arrayref failed: OpenClient message: LAYER = (0) ORIGIN = (0) SEVERITY = (9) NUMBER = (99) Server , database Message String: WARNING! Some character(s) could not be converted into client's character set. Unconverted bytes were changed to question marks ('?'). This seems to happen for records that contain special Windows character-set characters, such as curly quotes, copied and pasted from people's Outlook and Word messages. Unfortunately, I do not have any control of this database; sanitizing the input on the way in is obviously the way to go, but is not available to me. What FreeTDS settings do I need to change to be able to successfully query these records?

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  • Codeigniter: Combining activeRecord with manual queries?

    - by Industrial
    Hi everybody, I've though a bit about the activerecord vs. manual queries in Codeigniter. ActiveRecord is awesome when it's all about standard queries and holds development time really low. However, when there's a need to add some complexity to the queries, the ActiveRecord gets quite complicated to work with. Sub queries or complex joins gives atleast me a lot of headache. Since the current "$this-db-query" -call immediately executes the set query, it can't be combined with normal activeRecord calls. So, what can I do to combine the two methods? Thanks!

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  • C# Linq Entity Conversion Error on Nonexistent Value?

    - by Ryan
    While trying to query some data using the Linq Entity Framework I'm receiving the following exception: {"Conversion failed when converting the varchar value '3208,7' to data type int."} The thing that is confusing is that this value does not even exist in the view I am querying from. It does exist in the table the view is based on, however. The query I'm running is the following: return context.vb_audit_department .Where(x => x.department_id == department_id && x.version_id == version_id) .GroupBy(x => new { x.action_date, x.change_type, x.user_ntid, x.label }) .Select(x => new { action_date = x.Key.action_date, change_type = x.Key.change_type, user_ntid = x.Key.user_ntid, label = x.Key.label, count = x.Count(), items = x }) .OrderByDescending(x => x.action_date) .Skip(startRowIndex) .Take(maximumRows) .ToList(); Can somebody explain why LINQ queries the underlying table instead of the actual view, and if there is any way around this behavior?

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  • How does Fluent NHibernate support the Import Entity

    - by Bender
    I want to create a strongly type object from a fluent NHibernate query. If I were using HQL and NHibernate I belive I would need: the class for the output Namespace Model Public Class namecount Public Overridable Property lastname() as string ... Public Overridable Property lastnamecount() as integer ... Public Sub New(lastname as string, count as integer) ... End Class End Namespace an .hbm.xml file <?xml ...> <hibernate-mapping ...> <import class="model.namecount,model"> </hibernate-mapping> and of course the query _session.createquery("select new namecount(lastname, count(lastname)) ...") (The above is a paraphrased example taken from one of the 2008 SummerofNHibernate videos) I cannot find any examples of how to do this with fluent (even in C#), is it possible? If it isn't is there a VB example of how to mix Fluent and .hbm.xml

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  • How to create a custom ADO Multi Dimensional Catalog with no database

    - by Alan Clark
    Does anyone know of an example of how to dynamically define and build ADO MD (ActiveX Data Objects Multidimensional) catalogs and cube definitions with a set of data other than a database? Background: we have a huge amount of data in our application that we export to a database and then query using the usual SQL joins, groups, sums etc to produce reports. The data in the application is originally in objects and arrays. The problem is the amount of data is so large the export can take 2 hours. So I am trying to figure out a good way of querying the objects in memory, either by a custom OLAP algorithm or library, or ADO MD. But I haven't been able to find an example of using ADO MD without a database behind it. We are using Delphi 2010 so would use ADO ActiveX but I imagine the ADO.NET MD is similar. I realize that if the application data was already stored in a database the problem would solve itself. Also if Delphi had LINQ capability I could query the objects and arrays that way.

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  • LEFT OUTER JOIN in NHibernate with SQL semantics

    - by Yuval
    Hi, Is it possible to use HQL/ICritera to produce a query with the same semantics as the following SQL query: select table1.A, table2.B, count(*) from table1 left join (select table2.parent_id, table2.B from table2 where table2.C = 'Some value') as table2 on table2.parent_id = table1.id group by table1.A, table2.B order by table1.A In particular, what I'd like is to receive rows (that is, objects) from table1 that have no matching rows in table2. However, I only get the rows from table1 that have matches in table2. Is this the meaning of 'LEFT JOIN' in HQL? And if so, how can I get it to join on a subquery? Tnx.

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  • How to use IObservable/IObserver with ConcurrentQueue or ConcurrentStack

    - by James Black
    I realized that when I am trying to process items in a concurrent queue using multiple threads while multiple threads can be putting items into it, the ideal solution would be to use the Reactive Extensions with the Concurrent data structures. My original question is at: http://stackoverflow.com/questions/2997797/while-using-concurrentqueue-trying-to-dequeue-while-looping-through-in-parallel/ So I am curious if there is any way to have a LINQ (or PLINQ) query that will continuously be dequeueing as items are put into it. I am trying to get this to work in a way where I can have n number of producers pushing into the queue and a limited number of threads to process, so I don't overload the database. If I could use Rx framework then I expect that I could just start it, and if 100 items are placed in within 100ms, then the 20 threads that are part of the PLINQ query would just process through the queue. There are three technologies I am trying to work together: Rx Framework (Reactive LINQ) PLING System.Collections.Concurrent structures

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  • LIKE operator with $variable

    - by skarama
    This is my first question here and I hope it is simple enough to get a quick answer! Basically, I have the following code: $variable = curPageURL(); $query = 'SELECT * FROM `tablename` WHERE `columnname` LIKE '$variable' ; If I echo the $variable, it prints the current page's url( which is a javascript on my page) Ultimately, what I want, is to be able to make a search for which the search-term is the current page's url, with wildcards before and after. I am not sure if this is possible at all, or if I simply have a syntax error, because I get no errors, simply no result! I tried : $query = 'SELECT * FROM `tablename` WHERE `columnname` LIKE '"echo $variable" ' ; But again, I'm probably missing or using a misplaced ' " ; etc. Please tell me what I'm doing wrong!

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  • How to do an IF statement based on the value of a MySQL table cell?

    - by Susan
    How can I do an if statement based on the value of a mysql table cell. For example, I have a table of people with a column called marital_status. This column has one of two values: yes or no. But this doesn't work: $query = mysql_query("SELECT marital_status FROM people WHERE first_name = 'John'"); while ($row = mysql_fetch_assoc($query)) { $maritalStatus = $row['marital_status']; } if ($maritalStatus == "yes") { echo "This person is married."; } else { echo "This person is NOT married."; } $maritalStatus == "yes" doesn't return as true even though that is exactly the value in that cell.

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  • ROW_NUMBER() VS. DISTINCT

    - by ramadan2050
    Dear All, I have a problem with ROW_NUMBER() , if i used it with DISTINCT in the following Query I have 2 scenarios: 1- run this query direct : give me for example 400 record as a result 2- uncomment a line which start with [--Uncomment1--] : give me 700 record as a result it duplicated some records not all the records what I want is to solve this problem or to find any way to show a row counter beside each row, to make a [where rownumber between 1 and 30] --Uncomment2-- if I put the whole query in a table, and then filter it , it is work but it still so slow waiting for any feedback and I will appreciate that Thanks in advance SELECT * FROM (SELECT Distinct CRSTask.ID AS TaskID, CRSTask.WFLTaskID, --Uncomment1-- ROW_NUMBER() OVER (ORDER By CRSTask.CreateDate asc ) AS RowNum , CRSTask.WFLStatus AS Task_WFLStatus, CRSTask.Name AS StepName, CRSTask.ModifiedDate AS Task_ModifyDate, CRSTask.SendingDate AS Task_SendingDate, CRSTask.ReceiveDate AS Task_ReceiveDate, CRSTask.CreateDate AS Task_CreateDate, CRS_Task_Recipient_Vw.Task_CurrentSenderName, CRS_Task_Recipient_Vw.Task_SenderName, CRS_INFO.ID AS CRS_ID, CRS_INFO.ReferenceNumber, CRS_INFO.CRSBeneficiaries, CRS_INFO.BarCodeNumber, ISNULL(dbo.CRS_FNC_GetTaskReceiver(CRSTask.ID), '') + ' ' + ISNULL (CRS_Organization.ArName, '') AS OrgName, CRS_Info.IncidentID, COALESCE(CRS_Subject.ArSubject, '??? ????') AS ArSubject, COALESCE(CRS_INFO.Subject, 'Blank Subject') AS CRS_Subject, CRS_INFO.Mode, CRS_Task_Recipient_Vw.ReceiverID, CRS_Task_Recipient_Vw.ReceiverType, CRS_Task_Recipient_Vw.CC, Temp_Portal_Users_View.ID AS CRS_LockedByID, Temp_Portal_Users_View.ArabicName AS CRS_LockedByName, CRSDraft.ID AS DraftID, CRSDraft.Type AS DraftType, CASE WHEN CRS_Folder = 1 THEN Task_SenderName WHEN CRS_Folder = 2 THEN Task_SenderName WHEN CRS_Folder = 3 THEN Task_CurrentSenderName END AS SenderName, CRS_Task_Folder_Vw.CRS_Folder, CRS_INFO.Status, CRS_INFO.CRS_Type, CRS_Type.arName AS CRS_Type_Name FROM CRS_Task_Folder_Vw LEFT OUTER JOIN CRSTask ON CRSTask.ID = CRS_Task_Folder_Vw.TaskID LEFT OUTER JOIN CRS_INFO ON CRS_INFO.ID = CRSTask.CRSID LEFT OUTER JOIN CRS_Subject ON COALESCE( SUBSTRING( CRS_INFO.Subject, CHARINDEX('_', CRS_INFO.Subject) + 1, LEN(CRS_INFO.Subject) ), 'Blank Subject' ) = CRS_Subject.ID LEFT OUTER JOIN CRSInfoAttribute ON CRS_INFO.ID = CRSInfoAttribute.ID LEFT OUTER JOIN CRS_Organization ON CRS_Organization.ID = CRSInfoAttribute.SourceID LEFT OUTER JOIN CRS_Type ON CRS_INFO.CRS_Type = CRS_Type.ID LEFT OUTER JOIN CRS_Way ON CRS_INFO.CRS_Send_Way = CRS_Way.ID LEFT OUTER JOIN CRS_Priority ON CRS_INFO.CRS_Priority_ID = CRS_Priority.ID LEFT OUTER JOIN CRS_SecurityLevel ON CRS_INFO.SecurityLevelID = CRS_SecurityLevel.ID LEFT OUTER JOIN Portal_Users_View ON Portal_Users_View.ID = CRS_INFO.CRS_Initiator LEFT OUTER JOIN AD_DOC_TBL ON CRS_INFO.DocumentID = AD_DOC_TBL.ID LEFT OUTER JOIN CRSTask AS Temp_CRSTask ON CRSTask.ParentTask = Temp_CRSTask.ID LEFT OUTER JOIN Portal_Users_View AS Temp_Portal_Users_View ON Temp_Portal_Users_View.ID = AD_DOC_TBL.Lock_User_ID LEFT OUTER JOIN Portal_Users_View AS Temp1_Portal_Users_View ON Temp1_Portal_Users_View.ID = CRS_INFO.ClosedBy LEFT OUTER JOIN CRSDraft ON CRSTask.ID = CRSDraft.TaskID LEFT OUTER JOIN CRS_Task_Recipient_Vw ON CRSTask.ID = CRS_Task_Recipient_Vw.TaskID --LEFT OUTER JOIN CRSTaskReceiverUsers ON CRSTask.ID = CRSTaskReceiverUsers.CRSTaskID AND CRS_Task_Recipient_Vw.ReceiverID = CRSTaskReceiverUsers.ReceiverID LEFT OUTER JOIN CRSTaskReceiverUserProfile ON CRSTask.ID = CRSTaskReceiverUserProfile.TaskID WHERE Crs_Info.SUBJECT <> 'Blank Subject' AND (CRS_INFO.Subject NOT LIKE '%null%') AND CRS_Info.IsDeleted <> 1 /* AND CRSTask.WFLStatus <> 6 AND CRSTask.WFLStatus <> 8 */ AND ( ( CRS_Task_Recipient_Vw.ReceiverID IN (1, 29) AND CRS_Task_Recipient_Vw.ReceiverType IN (1, 3, 4) ) ) AND 1 = 1 )Codes --Uncomment2-- WHERE Codes.RowNum BETWEEN 1 AND 30 ORDER BY Codes.Task_CreateDate ASC

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  • XPath and special characters

    - by Bryan
    I am having an issue with an XPath query I'm performing for a Sitecore CMS system. This query works fine: /root/content/Meta-Data/Tips/* But when I try this: /root/content/Meta-Data/Tips/*[@SomeAttribute='somekey'] I get an error which says "End of string expected at position 22" which is where the dash character is found. I was under the impression that the dash was not a special character in XML... am I doing something wrong here? Do I need to encode this in some way? Or is this a bug in the XPath parser? Any suggested workarounds?

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  • Idiots guide to app engine and memcache

    - by Gareth Simpson
    I am struggling to find a good tutorial or best practices document for the use of memcache in app engine. I'm pretty happy with it on the level presented in the docs. Get an object by ID, checking memcache first, but I'm unclear on things like: If you cache a query, is there an accepted method for ensuring that the cache is cleared/updated when an object stored in that query is updated. What are the effects of using ReferenceProperties ? If a cache a Foo object with a Bar reference. Is my foo.bar in memcache too and in need of clearing down if it gets updated from some other part of my application. I don't expect answers to this here (unless you are feeling particularly generous!), but pointers to things I could read would be very gratefully received.

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  • ADO.NET Entity Model and LINQ

    - by Richard
    Hi all I'm using an ADO.NET Entity Model which I'm trying to query using LINQ. The problem I'm having is that I can't specify the where clause as I'd like. For instance, consider the following query: AccountsDM db = new AccountsDM(ConfigurationManager.ConnectionStrings["PrimaryEF"].ConnectionString); var accounts = from a in db.Accounts select a; foreach (var account in accounts) { foreach (var ident in account.Identifiers) { if (ident.Identifier == identifier) { // ident.Identifier is what I'd like to be filtering in the WHERE clause below } } } Ideally, I'd like that to become: var accounts = from a in db.Accounts where a.Identifiers.Identifier == identifier select a; I'm guessing I've probably not set up my Entity Model correctly in VS2010. Any advice you can offer would be gratefully received. Thanks, Richard.

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