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  • LINQ to Entity, joining on NOT IN tables

    - by SlackerCoder
    My brain seems to be mush right now! I am using LINQ to Entity, and I need to get some data from one table that does NOT exist in another table. For example: I need the groupID, groupname and groupnumber from TABLE A where they do not exist in TABLE B. The groupID will exist in TABLE B, along with other relevant information. The tables do not have any relationship. In SQL it would be quite simply (there is a more elegant and efficient solution, but I want to paint a picture of what I need) SELECT GroupID, GroupName, GroupNumber, FROM TableA WHERE GroupID NOT IN (SELECT GroupID FROM TableB) Is there an easy/elegant way to do this? Right now I have a bunch of queries hitting the db, then comparing, etc. It's pretty messy. Thanks.

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  • Mysql - Grouping the result based on a mathematical operation and SUM() function

    - by SpikETidE
    Hi all... I'm having the following two tables... Table : room_type type_id type_name no_of_rooms max_guests rate 1 Type 1 15 2 1254 2 Type 2 10 1 3025 Table : reservation reservation_id start_date end_date room_type booked_rooms 1 2010-04-12 2010-04-15 1 8 2 2010-04-12 2010-04-15 1 2 Now... I have this query SELECT type_id, type_name FROM room_type WHERE id NOT IN (SELECT room_type FROM reservation WHERE start_date >= '$start_date' AND end_date <= '$end_date') What the query does is it selects the rooms that are not booked between the start date and end date. Also, as you can see from the reservation table, we also have 'number of rooms booked between the two dates' factor also... I need to add this 'no.of booked rooms between the two dates' factor also in to the query... The query should return the type of rooms for which at least one room is free between the two dates. I worked out the logic but just can't represent it as a query....! How will you do this...? Thanks for your suggestions..!

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  • Clever "add tag" javascript help needed

    - by Camran
    I have this function for adding options to a Select list: function addOption(selectbox, value, text, cl ) { var optn = document.createElement("OPTION"); optn.text = text; optn.value = value; if (cl==1){ optn.className = "nav_option_main"; } selectbox.options.add(optn); } I have just discovered the "optgroup" tag, but I don't know how to implement it to the drop list. The function above is called on another selectboxes "OnChange" event, to fill sub-select-box with the desired options. I don't think it should be too difficult to add the "optgroup" tag into this, or is it? Thanks and if you need more input let me know...

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  • Planning a competition

    - by Jérôme
    I need to produce the schedule of a sport-event. There are 30 teams. Each team has to play 8 matches. This means that it is not possible for each team to compete again all other teams, but I need to avoid that two team compete more than once against each other. My idea was to generate all possible matches (for 30 teams: (30*29)/2 = 435 matches) and select from this list 120 matches (8 match for each team: 8 * 30 / 2 = 120 matches). This is where I'm having a hard time: how can I select these 120 matches? I tried some simple solutions (take first match of the list, then the last, and so on) but they don't seem to work with 30 teams. I also tried to generate all possible match combination and find which one is working but with 30 team, this is too much calculation time. Is there an existing algorithm that I could implement?

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  • C# Convert negative int to 11 bits

    - by Klemenko
    I need to convert numbers in interval [–1024, 1016]. I'm converting to 11 bits like that: string s = Convert.ToString(value, 2); //Convert to binary in a string int[] bits = s.PadLeft(11, '0') // Add 0's from left .Select(c => int.Parse(c.ToString())) // convert each char to int .ToArray(); // Convert IEnumerable from select to Array This works perfectly for signed integers [0, 1016]. But for negative integers I get 32 bits result. Do you have any idea how to convert negative integers to 11 bits array?

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  • how to change the value to a name depending on case

    - by ZeroSoul13
    i've created a select button with 3 option <%= f.label :prioridad %><br/> <%= f.select :prioridad, options_for_select([['Alta', 1], ['Medio', 2], ['Baja', 3]]) %> The value gets inserted to the DataBase but when i display it i see the number op the option selected (which is correct). What i would like to know is how i can change that so on the index the user can see the name and not the value: def convertidor case llamada.prioridad when prioridad == '1' puts "Alta" when prioridad == '2' puts "Media" else puts "Baja" end end This didn't worked. Regars

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  • android existing activity read intent of file from OnResume

    - by manhon
    I have associated my app with txt file. So user can select a file in File explorer app and select my app to open it. In OnCreate: Intent intent = getIntent(); String action = intent.getAction(); if (action != null && action.equals(Intent.ACTION_VIEW)) { txtFilePath = intent.getData().getPath(); } However, when user did not close my app, and he goes back to file explorer and open another file, OnCreate is not called. OnResusme is called instead. I put below code in OnResume: Intent intent = getIntent(); String action = intent.getAction(); if (action != null && action.equals(Intent.MAIN)) { txtFilePath = intent.getData().getPath(); } However, txtFilePath is null. Why? Thank a lot for help.

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  • How to convert full outer join query to O-R query?

    - by Kugel
    I'm converting relational database into object-relational in Oracle. I have a query that uses full outer join in the old one. Is it possible to write the same query for O-R database without explicitly using full outer join? For normal inner join it simple, I just use dot notation together with ref/deref. I'm interested in this in general so let's say the relational query is: select a.attr, b.attr from a full outer join b on (a.fk = b.pk); I want to know if it's a good idea to do it this way: select a.attr, b.attr from a_obj a full outer join b_obj b on (a.b_ref = ref(b));

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  • How can I combine xsl:attribute and xsl:use-attribute-sets to conditionally use an attribute set?

    - by Peter
    We have an xml node "item" with an attribute "style", which is "Header1". This style can change however. We have an attribute set named Header1 which defines how this should look in a PDF, generated through xsl:fo. This works (the use-attribute-sets is mentioned inline, in the fo:table-cell node): <xsl:template match="item[@type='label']"> <fo:table-row> <fo:table-cell xsl:use-attribute-sets="Header1"> <fo:block> <fo:inline font-size="8pt" > <xsl:value-of select="." /> </fo:inline> </fo:block> </fo:table-cell> </fo:table-row> </xsl:template> But this doesn't (using xsl:attribute, because the attribute @style can also be Header2 for example). It doesn't generate an error, the PDF is created, but the attributes aren't applied. <xsl:template match="item[@type='label']"> <fo:table-row> <fo:table-cell> <xsl:attribute name="xsl:use-attribute-sets"> <xsl:value-of select="@style" /> </xsl:attribute> <fo:block> <fo:inline font-size="8pt" > <xsl:value-of select="." /> </fo:inline> </fo:block> </fo:table-cell> </fo:table-row> </xsl:template> Does anyone know why? And how we could achieve this, preferably without long xsl:if or xsl:when stuff?

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  • How can i have different LINQ to XML quries based on two different condition?

    - by Subhen
    Hi , We want the query result should be assigned with two results based on some condition like following: var vAudioData = (from xAudioinfo in xResponse.Descendants(ns + "DIDL-Lite").Elements(ns + "item") if((xAudioinfo.Element(upnp + "artist")!=null) { select new RMSMedia { strAudioTitle = ((string)xAudioinfo.Element(dc + "title")).Trim() }; } else select new RMSMedia { strGen = ((string)xAudioinfo.Element(dc + "Gen")).Trim() }; The VarAudioData should contain both if and else condition values. I have added the if condition just to project , what is my needs, m quite sure though that we can not use if and else. Please help if there are any other approach to accomplish this. Thanks, Subhen

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  • How to build a SQL statement when any combination of user input to the table is possible?

    - by Greg McNulty
    Example: the user fills in everything but the product name. I need to search on what is supplied, so in this case everything but productName= This example could be for any combination of input. Is there a way to do this? Thanks. $name = $_POST['n']; $cat = $_POST['c']; $price = $_POST['p']; if( !($name) ) { $name = some character to select all? } $sql = "SELECT * FROM products WHERE productCategory='$cat' and productName='$name' and productPrice='$price' "; EDIT Solution does not have to protect from attacks. Specifically looking at the dynamic part of it.

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  • How to filter entities by their parents in ManyToOne side in Google App Engine

    - by palto
    I use Google App Engine. When I try to do a JPA query like this: "SELECT p FROM Participant p WHERE p.party.id = :partyKey AND p.name=:participantName" I get the following error Caused by: org.datanucleus.store.appengine.FatalNucleusUserException: SELECT FROM Participant p WHERE p.party.id = :partyKey AND p.name=:participantName: Can only reference properties of a sub-object if the sub-object is embedded. I gave the key of the Party object as a parameter to the "partyKey" named parameter. The model is like this: Party has multiple Participants. I want to query a participant based on the party and the name of the participant. I just can't figure out how to filter using the party. What options do I have?

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  • retrieve columns from sqlite3

    - by John Smith
    I have two tables in sqlite: CREATE TABLE fruit ('fid' integer, 'name' text); CREATE TABLE basket ('fid1' integer, 'fid2' integer, 'c1' integer, 'c2' integer); basket is supposed to have count c1 of fruit fid1 and c2 of fruit fid2 I created a view fruitbasket; create view fruitbasket as select * from basket inner join fruit a on a.fid=basket.fid1 inner join fruit b on b.fid=basket.fid2; it works (almost) as expected. When I type pragma table_info(fruitbasket); I get the following output 0|fid1|integer|0||0 1|fid2|integer|0||0 2|c1|integer|0||0 3|c2|integer|0||0 4|fid|integer|0||0 5|name|text|0||0 6|fid:1|integer|0||0 7|name:1|text|0||0 The problem is that I cannot seem to SELECT name:1. How can I do it other than going back and re-aliasing the columns?

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  • How to retrieve row count of one-to-many relation while also include original entity?

    - by kaa
    Say I have two entities Foo and Bar where Foo has-many Bar's, class Foo { int ImportantNumber { get; set; } IEnumerable<Bar> Bars { get; set; } } class FooDTO { Foo Foo { get; set; } int BarCount { get; set; } } How can I efficiently sum up the number of Bars per Foo in a DTO using a single query, preferrably only with the Criteria interface. I have tried any number of ways to get the original entity out of a query with ´SetProjection´ but no luck. The current theory is to do something like SELECT Foo.*, BarCounts.counts FROM Foo LEFT JOIN ( SELECT fooId, COUNT(*) as counts FROM Bar GROUP BY fooId ) AS BarCounts ON Foo.id=BarCounts.fooId but with Criterias, and I just can't seem to figure out how.

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  • LINQ Equivalent query

    - by GilliVilla
    I have a List<string> List<string> students; students.Add("123Rob"); students.Add("234Schulz"); and a Dictionary<string,string> Dictionary<string, string> courses = new Dictionary<string, string>(); courses .Add("Rob", "Chemistry"); courses .Add("Bob", "Math"); courses .Add("Holly", "Physics"); courses .Add("Schulz", "Botany"); My objective now is to get a List with the values - {Chemistry,Botany} . In other words, I am trying to get the LINQ equivalent of select value from [courses] where [courses].key in ( select [courses].key from courses,students where [students].id LIKE '%courses.key%' ) How should the LINQ query be framed?

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  • Assign values from same table

    - by Reddy S R
    I have a database table with parent child relationships between different rows. 1 parent can have any number of children. Children do not have children. I want to copy 'Message' from 'Parent Category' to child categories. CategoryID Name Value Message ParentID DeptId 1 Books 9 Specials 1 2 Music 7 1 3 Paperback 25 1 1 4 PDFs 26 1 2 5 CDs 35 2 1 If that was sample data, Paperback should have Specials as it's Message after the query is run. I have gotten the child rows (the query runs very slow, don't know why), but how do I get the data and assign it to appropriate child rows? --@DeptId = 1 select * from Categories where ParentID in( select CategoryID from Categories where DeptID = @DeptId ) I would like to see a solution that would not use cursors. Thanks

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  • All possible combinations for two column data

    - by Alec Dobbie
    I have a two column view Product Id Tag ---------------------- 1 Leather 1 Watch 2 Red 2 Necklace 2 Pearl I'm trying to get all possible combinations of tags for a product as such: 1 Leather 1 Leather,Watch 2 Pearl 2 Pearl,Necklace 2 Pearl Necklace,Red 2 Necklace 2 Necklace, Red 2 Red I've found and stolen some SQL that give me the complete list for all but not the small versions, its below. Any ideas, it's started to make my head hurt. A virtual pint for the best answer. SELECT ProductId, (SELECT CAST(Tag + ', ' AS VARCHAR(MAX)) FROM ProductByTagView WHERE Product.ProductId = ProductByTagView.ProductId order by tag FOR XML PATH ('')) AS Tags FROM Product

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  • Having a Link Only Appear If a Logged-In User Appears on a Dynamic List

    - by John
    Hello, For the function below, I would like the link <div class="footervote"><a href="http://www...com/.../footervote.php">Vote</a></div> to only appear if the logged in user currently appears on editorlist.php. (I. e. if the loginid in the function corresponds to any of the usernames that currently appear in editorlist.php.) Appearing on editorlist.php is something that is dynamic. How can I do this? Thanks in advance, John function show_userbox() { // retrieve the session information $u = $_SESSION['username']; $uid = $_SESSION['loginid']; // display the user box echo '<div id="userbox"> <div class="username">'.$u.'</div> <div class="submit"><a href="http://www...com/.../submit.php">Submit an item.</a></div> <div class="changepassword"><a href="http://www...com/.../changepassword.php">Change Password</a></div> <div class="logout"><a href="http://www...com/.../logout.php">Logout</a></div> <div class="footervote"><a href="http://www...com/.../footervote.php">Vote</a></div> </div>'; } On editorlist.php: $sqlStr = "SELECT l.loginid, l.username, l.created, DATEDIFF(NOW(), l.created) AS days, COALESCE(s.total, 0) AS countSubmissions, COALESCE(c.total, 0) AS countComments, COALESCE(s.total, 0) * 10 + COALESCE(c.total, 0) AS totalScore, DATEDIFF(NOW(), l.created) + COALESCE(s.total, 0) * 10 + COALESCE(c.total, 0) AS totalScore2 FROM login l LEFT JOIN ( SELECT loginid, COUNT(1) AS total FROM submission GROUP BY loginid ) s ON l.loginid = s.loginid LEFT JOIN ( SELECT loginid, COUNT(1) AS total FROM comment GROUP BY loginid ) c ON l.loginid = c.loginid GROUP BY l.loginid ORDER BY totalScore2 DESC LIMIT 10"; $result = mysql_query($sqlStr); $arr = array(); echo "<table class=\"samplesrec1edit\">"; while ($row = mysql_fetch_array($result)) { echo '<tr>'; echo '<td class="sitename1edit1"><a href="http://www...com/.../members/index.php?profile='.$row["username"].'">'.stripslashes($row["username"]).'</a></td>'; echo '<td class="sitename1edit2">'.($row["countSubmissions"]).'</td>'; echo '<td class="sitename1edit2">'.($row["countComments"]).'</td>'; echo '<td class="sitename1edit2">'.($row["days"]).'</td>'; echo '<td class="sitename1edit2">'.($row["totalScore2"]).'</td>'; echo '</tr>'; } echo "</table>";

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  • How to structure this query...?

    - by SpikETidE
    Hi Everyone... Consider the following table.... hotel facilities 1 internet 1 swimming pool 1 wi-fi 1 parking 2 swimming pool 2 sauna 2 parking 3 toilets 3 bungee-jumping 3 internet 4 parking 4 swimming pool I need to select only the hotels that have parking, swimming pool and internet....? I worked out the following.... SELECT hotel FROM table WHERE facilties IN(internet, swimming pool, parking) This query selects the hotels that has atleast one among the choices. But what i need is a query that selects the hotels that has ALL of the selected facilities... Thanks for your suggestions....

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  • How to skip the invalid rows while inserting the data into Database

    - by Dinesh
    We have a statement., that is inserting some rows in a temporary table (say e.g., 10 rows), while inserting 5th row, it has some issue with one of the column format and giving an error and then it stopped inserting the rows. What I want is, it should skip the error rows and insert valid rows. For those error rows, it can skip that error column and insert with some null value & different status. create table #tb_pagecontent_value (pageid int,formid uniqueidentifier, id_field xml,fieldvalue xml,label_final xml) … … insert into #tb_pagecontent_xml select A.pageid,B.formid,A.PageData.query('/CPageDataXML/control') from Pagedata A inner join page B on A.PageId=B.PageId inner join FormAssociation C on B.FormId=C.FormId where B.pageid in (select pageId from jobs where jobtype='zba' and StatusFlag!=1) in the above e.g., I want to apply that logic. Any help is appreciated.

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  • Use where condition with unjoined table

    - by Dragos D
    I have the following problem: I am trying to retreive a sum value based on one condition. Problem is that I can't join the conditional value since my tables aren't joined. Here is my syntax: SELECT SUM(value) FROM value v join day d on v.day_id = d.day_id join budget b on d.budget_id = b.budget_id join unit u on v.unit_id = u.unit_id where #output.class = (SELECT distinct s.class FROM sale s where s.id = #output.sale_id) AND u.unit_name in ('electronics') With this sybtax I get no error but neither values. Can you please tell me where I do wrong?

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  • Opening an Excel file in c#

    - by Jan de Jager
    So there are a lot of questions regarding this method on SO, but none seem to answer my question. I firstly had an issue with the connectionstring (although it seems to work in other areas of my code correctly). This was resolved easily. Now the issue is with a simple SELECT query via a OLEDBCommand (Text) that keeps popping up the following error? "SELECT [Opportunity#],[BidManager],[Prob %],[Opportunity_Stage].[Opportunity_Status],[Term],[Sign Date] FROM [Sheet1$];" No value given for one or more required parameters. but their are no parameters???? Checked and double checked the columns names, but to no avail. Also tried removing the special characters from the column names, but still the same exception.

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  • Need help on nested loop of queries in php and mysql?

    - by mysqllearner
    Hi, I am trying to get do this: <?php $good_customer = 0; $q = mysql_query("SELECT user FROM users WHERE activated = '1'"); // this gives me about 40k users while($r = mysql_fetch_assoc($q)){ $money_spent = 0; $user = $r['user']; // Do queries on another 20 tables for($i = 1; $i<=20 ; $i++){ $tbl_name = 'data' . $i; $q2 = mysql_query("SELECT money_spent FROM $tbl_name WHERE user = '{$user}'"); while($r2 = mysql_fetch_assoc($q2)){ $money_spend += $r2['money_spent']; } if($money_spend > 1000000){ $good_customer += 1; } } } This is just an example. I am testing on localhost, for single user, it returns very fast. But when I try 1000, it takes forever, not even mentioned 40k users. Anyway to optimise/improve this code? EDIT: By the way, each of the others 20 tables has ~20 - 40k records

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  • Loop through multiple tables to execute same query

    - by pcvnes
    Hi, I have a database wherein per day a table is created to log process instances. The tables are labeled MESSAGE_LOG_YYYYMMDD Currently i want to sequentially execute the same QUERY against all those tables. I wrote the PL/SQL below, but got stuck at line 10. How can i execute the SQL statement against successfully against all tables here ? DECLARE CURSOR all_tables IS SELECT table_name FROM all_tables WHERE TABLE_NAME like 'MESSAGE_LOG_2%' ORDER BY TABLE_NAME ; BEGIN FOR msglog IN all_tables LOOP SELECT count(*) FROM TABLE msglog.TABLE_NAME ; END LOOP; END; / Cheers, Peter

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