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  • Select back things that _don't_ exist

    - by bobobobo
    I have this table. I want to select back the items that don't exist already, so I can create them. table tags +---------+-------+ | tagId | name | | 1 | C | | 2 | DX | | 3 | CG | Say SQL looks like: select name from tags where name in ( 'C', 'CG', 'RX' ) You get back 'C' and 'CG', so you know you have to create 'RX'. Is there a way to get a MySQL statement like this to return 'RX' instead, when 'RX' doesn't already exist?

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  • Using AVG() in Oracle SQL

    - by Viet Anh
    I have a table named Student as followed: CREATE TABLE "STUDENT" ( "ID" NUMBER(*,0), "NAME" VARCHAR2(20), "AGE" NUMBER(*,0), "CITY" VARCHAR2(20), PRIMARY KEY ("ID") ENABLE ) I am trying to get all the records of the students having a larger age than the average age. This is what I tried: SELECT * FROM student WHERE age > AVG(age) and SELECT * FROM student HAVING age > AVG(age) Both ways did not work!

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  • Multiple Row Selection in UIPickerView

    - by medma
    hi frends, Today I have a problem related to uipicker. I want to select multiple rows in picker, so I have an idea to show my data in a table and add this table as subview to picker. I have tried a lot but didn't succeed. Please help if u can?? Thanx Ankit

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  • MySQL database query returns empty result

    - by user1791096
    I am doing a data migration and getting empty result of simple query with one join. Following is the query Select * from users u INNER JOIN temp_users tu ON tu.uid = u.uid There hundreds of records which have same uid in both tables, but this query returns only one record. Following is the structure of tables users table uid: varchar(50) utf8_general_ci Yes NULL temp_users table uid: varchar(50) utf8_general_ci Yes NULL Is there anyone who faced same problem?

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  • text flowing out of border in pdf

    - by Jasim
    I have created a pdf using tcpdf in php. i have a table with one row and one column. when i put the content from a form which is a textarea, the content in the form flows out of the table border. how can i make it so that it is contained in the border itslef???

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  • How do I get the length of a regex match in vim?

    - by misfo
    If I want to get the length of each match within the parentheses in the following regex, how do I do it?: ^\(\-\+\s\)\+ I'm trying to modify the width of columns in a buffer with data that is laid out as a table. Since the first two rows of the table will look like this DESIGN_ID DESIGN_YEAR SOURCE_REFERENCE ---------- ----------- ---------------- I want to use the regular expression to find the current width of each column.

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  • rake db:migrate not executing new migrations

    - by Matt H
    Hi guys. I'm trying to add some columns to an existing table, so I generated a migration that did so. When I run db:migrate the new migration isn't run and the table isn't updated. I've had this problem many times before, and it's getting bloody annoying. Output from rake db:migrate $ rake db:migrate --trace (in /Users/one/app) ** Invoke db:migrate (first_time) ** Invoke environment (first_time) ** Execute environment ** Execute db:migrate ** Invoke db:schema:dump (first_time) ** Invoke environment ** Execute db:schema:dump

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  • Flex AS3: ProgressBar doesn't move

    - by jolierouge
    Hey All, I am a little stuck and need some advice/help. I have a progress bar: <mx:ProgressBar id="appProgress" mode="manual" width="300" label="{appProgressMsg}" minimum="0" maximum="100"/> I have two listener functions, one sets the progress, and one sets the appProgressMsg: public function incProgress(e:TEvent):void { var p:uint = Math.floor(e.data.number / e.data.total * 100); trace("Setting Perc." + p); appProgress.setProgress(p, 100); } public function setApplicationProgressStep(e:TEvent):void { trace("Setting step:" + e.data); appProgressMsg = e.data; } I want to reuse this progress bar alot. And not necessarily for ProgressEvents, but when going through steps. For instance, I loop over a bunch of database inserts, and want to undate the progress etc. Here is a sample: public function updateDatabase(result:Object):void { var total:int = 0; var i:int = 0; var r:SQLResult; trace("updateDatabase called."); for each (var table:XML in this.queries.elements("table")) { var key:String = table.attribute("name"); if (result[key]) { send(TEvent.UpdateApplicationProgressStep, "Updating " + key); i = 1; total = result[key].length; for each (var row:Object in result[key]) { //now, we need to see if we already have this record. send(TEvent.UpdateApplicationProgress, { number:i, total: total } ); r = this.query("select * from " + key + " where server_id = '" + row.id + "'"); if (r.data == null) { //there is no entry with this id, make one. this.query(table.insert, row); } else { //it exists, so let's update. this.update(key, row); } i++; } } } } Everything works fine. That is, the listener functions are called and I get trace output like: updateDatabase called. Setting step:Updating project Setting Perc 25 Setting Perc 50 Setting Perc 75 Setting Perc 100 The issue is, only the very last percent and step is shown. that is, when it's all done, the progress bar jumps to 100% and shows the last step label. Does anyone know why this is? Thanks in advance for any help, Jason

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  • Using a join model to relate a model to itself

    - by Gabe Hollombe
    I have two models: User MentoringRelationship MentoringRelationship is a join model that has a mentor_id column and a mentee_id column (both of these reference user_ids from the users table). How can I specify a relation called 'mentees' on the User class that will return all of the users mentored by this user, using the MentoringRelationships join table? What relations do we need to declare in the User model and in the MentoringRelationship model?

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  • How to count the length (number of lines) of a csv file in Rails?

    - by Mathias
    Hello, I have a form (Rails) which allows me to load a .csv file using the file_field. In the view: <% form_for(:upcsv, :html => {:multipart => true}) do |f| %> <table> <tr> <td><%= f.label("File:") %></td> <td><%= f.file_field(:filename) %></td> </tr> </table> <%= f.submit("Submit") %> <% end %> Clicking Submit redirects me to another page (create.html.erb). The file was loaded fine, and I was able to read the contents just fine in this second page. I am trying to show the number of lines in the .csv file in this second page. My controller (semi-pseudocode): class UpcsvController < ApplicationController def index end def create file = params[:upcsv][:filename] ... #params[:upcsv][:file_length] = file.length # Show number of lines in the file #params[:upcsv][:file_length] = file.size ... end end Both file.length and file.size returns '91' when my file only contains 7 lines. From the Rails documentation that I read, once the Submit button is clicked, Rails creates a temp file of the uploaded file, and the params[:upcsv][:filename] contains the contents of the temp/uploaded file and not the path to the file. And I don't know how to extract the number of lines in my original file. What is the correct way to get the number of lines in the file? My create.html.erb: <table> <tr> <td>File length:</td> <td><%= params[:upcsv][:file_length] %></td> </tr> </table> I'm really new at Rails (just started last week), so please bear with my stupid questions. Thank you!

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  • Querying Last Entries group by DeviceId

    - by TTCG
    I have the database table logs as the following: I would like to extract the last entry of device, pollDate, status. For eg. deviceId, pollDate, status 1, 2010-95-06 10:53:28, 1 3, 2010-95-06 10:26:28, 1 I tried to run the following query but the distinct only selects the first records, not the latest SELECT DISTINCT deviceId, pollDate, status FROM logs GROUP By deviceId ORDER BY pollDate DESC So, could you please help me to extract the latest entries from the table? Thanks.

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  • I could use some help with my SQL command

    - by SuperSpy
    I've got a database table called 'mesg' with the following structure: receiver_id | sender_id | message | timestamp | read Example: 2 *(«me)* | 6 *(«nice girl)* | 'I like you, more than ghoti' | yearsago | 1 *(«seen it)* 2 *(«me)* | 6 *(«nice girl)* | 'I like you, more than fish' | now | 1 *(«seen it)* 6 *(«nice girl)* | 2 *(«me)* | 'Hey, wanna go fish?' | yearsago+1sec | 0 *(«she hasn't seen it)* It's quite a tricky thing that I want to achieve. I want to get: the most recent message(=ORDER BY time DESC) + 'contact name' + time for each 'conversation'. Contact name = uname WHERE uid = 'contact ID' (the username is in another table) Contact ID = if(sessionID*(«me)*=sender_id){receiver_id}else{sender_id} Conversation is me = receiver OR me = sender For example: From: **Bas Kreuntjes** *(« The message from bas is the most recent)* Hey $py, How are you doing... From: **Sophie Naarden** *(« Second recent)* Well hello, would you like to buy my spam? ... *(«I'll work on that later >p)* To: **Melanie van Deijk** *(« My message to Melanie is 3th)* And? Did you kiss him? ... That is a rough output. QUESTION: Could someone please help me setup a good SQL command. This will be the while loup <?php $sql = "????"; $result = mysql_query($sql); while($fetch = mysql_fetch_assoc($result)){ ?> <div class="message-block"> <h1><?php echo($fetch['uname']); ?></h1> <p><?php echo($fetch['message']); ?></p> <p><?php echo($fetch['time']); ?></p> </div> <?php } ?> I hope my explanation is good enough, if not, please tell me. Please don't mind my English, and the Dutch names (I am Dutch myself) Feel free to correct my English UPDATE1: Best I've got until now: But I do not want more than one conversation to show up... u=user table m=message table SELECT u.uname, m.message, m.receiver_uid, m.sender_uid, m.time FROM m, u WHERE (m.receiver_uid = '$myID' AND u.uid = m.sender_uid) OR (m.sender_uid = '$myID' AND u.uid = m.receiver_uid) ORDER BY time DESC;

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  • Access Insert Query

    - by tecno
    Hi, I am using C# to write/read to an Access 2007 Database. The table is ID - AutoNumber [pkey] Fname - Text Lname - Text Address - Text The query string I Use is "Insert into TblMain (Fname,Lname,Address) Values ('"+fname+"','"+lname+"','"+adrs+"')" No errors are returned, the query executes but data is not added to the db. Inserting to table using which does not have an autonumber data column works perfectly. What am I missing?

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  • Question about DBD::CSB Statement-Functions

    - by sid_com
    From the SQL::Statement::Functions documentation: Function syntax When using SQL::Statement/SQL::Parser directly to parse SQL, functions (either built-in or user-defined) may occur anywhere in a SQL statement that values, column names, table names, or predicates may occur. When using the modules through a DBD or in any other context in which the SQL is both parsed and executed, functions can occur in the same places except that they can not occur in the column selection clause of a SELECT statement that contains a FROM clause. # valid for both parsing and executing SELECT MyFunc(args); SELECT * FROM MyFunc(args); SELECT * FROM x WHERE MyFuncs(args); SELECT * FROM x WHERE y < MyFuncs(args); # valid only for parsing (won't work from a DBD) SELECT MyFunc(args) FROM x WHERE y; Reading this I would expect that the first SELECT-statement of my example shouldn't work and the second should but it is quite the contrary. #!/usr/bin/env perl use warnings; use strict; use 5.010; use DBI; open my $fh, '>', 'test.csv' or die $!; say $fh "id,name"; say $fh "1,Brown"; say $fh "2,Smith"; say $fh "7,Smith"; say $fh "8,Green"; close $fh; my $dbh = DBI->connect ( 'dbi:CSV:', undef, undef, { RaiseError => 1, f_ext => '.csv', }); my $table = 'test'; say "\nSELECT 1"; my $sth = $dbh->prepare ( "SELECT MAX( id ) FROM $table WHERE name LIKE 'Smith'" ); $sth->execute (); $sth->dump_results(); say "\nSELECT 2"; $sth = $dbh->prepare ( "SELECT * FROM $table WHERE id = MAX( id )" ); $sth->execute (); $sth->dump_results(); outputs: SELECT 1 '7' 1 rows SELECT 2 Unknown function 'MAX' at /usr/lib/perl5/site_perl/5.10.0/SQL/Parser.pm line 2893. DBD::CSV::db prepare failed: Unknown function 'MAX' at /usr/lib/perl5/site_perl/5.10.0/SQL/Parser.pm line 2894. [for Statement "SELECT * FROM test WHERE id = MAX( id )"] at ./so_3.pl line 30. DBD::CSV::db prepare failed: Unknown function 'MAX' at /usr/lib/perl5/site_perl/5.10.0/SQL/Parser.pm line 2894. [for Statement "SELECT * FROM test WHERE id = MAX( id )"] at ./so_3.pl line 30. Could someone explaine me this behavior?

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  • T-SQL For Each Alternative?

    - by davemackey
    I need to take data from one table and import it into another table. In pseudocode, something like this: For Each row in table1 If row.personid is in table2 then update table2.row Else insert row into table2 End If Next What is the best way to do this in T-SQL? As I understand it T-SQL doesn't support For Each..Next, so what alternatives do I have?

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  • SQL Server Constraints Across Tables

    - by chama
    I have a SQL Server database with an Apartment table (which has columns FloorNum and BuildingID) and an ApartmentBuilding table (with column NumFloors). Is there any way to set up a constraint (using the SQL Server UI) to check that Apartment.FloorNum is greater than ApartmentBuilding.NumFloors? I tried this: FloorNum > ApartmentBuilding.NumFloors but now I realize that I somehow have to join the columns on the BuildingID, but I have no idea how to do that within a constraint. Thanks for your help!

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  • Modal PopUp Extender labels wont update on Asynchronous Postback

    - by newbie2k
    Hi everyone! I have a ModalPopUpExtender with an UpdatePanel on it. On the UpdatePanel,there few labels and componentart Grid which Updates from the server on every Asynchronous postback when an image button is clicked. The Problem is that the server code updates the modalpopupextender labels as the information on the grid but it wont display the Updated version of it on the modal Popup Extender. Need some Help... Heres the sample code:     Name:     Loyalty Mode:     Expire Mode:     LoadingPanelClientTemplateId="LoadingFeedbackTemplate3" LoadingPanelPosition="MiddleCenter" LoadingPanelFadeDuration="1000" LoadingPanelFadeMaximumOpacity="60" OnNeedDataSource="LItemGrid_NeedDataSource" OnNeedRebind="LItemGrid_NeedRebind" OnPageIndexChanged="LItemGrid_PageIndexChanged" OnFilterCommand="LItemGrid_FilterCommand" OnSortCommand="LItemGrid_SortCommand" ShowFooter="true" PageSize="10" PagerStyle="Numbered" </Columns> </ComponentArt:GridLevel> </Levels> <ClientTemplates><ComponentArt:ClientTemplate Id="ClientTemplate2"> <table width="200" ><tr><td valign="center" align="center"> <table cellspacing="0" cellpadding="0" border="0"> <tr> <td style="font-size:10px;font-family:Verdana;">Loading...&nbsp;</td> <td><img src="images/spinner.gif" width="16" height="16" border="0"></td> </tr> </table> </td></tr></table> </ComponentArt:ClientTemplate> </ClientTemplates> </ComponentArt:Grid></ContentTemplate> <asp:Button ID="btnClose" runat="server" Text="Close" /> </asp:Panel> <asp:ModalPopupExtender TargetControlID="SaveImageButton1" ID="pnlModal_ModalPopupExtender" runat="server" DynamicServicePath="" Enabled="True" BackgroundCssClass="modalBackground" PopupControlID="pnlModal" CancelControlID="btnClose" DropShadow="true"> </asp:ModalPopupExtender> </ContentTemplate> </asp:UpdatePanel>

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  • iPhone: How to Trigger the Loading of a View Using a UI Element in a Previous View

    - by Kevin Horvath
    I've been reading the Head First iPhone Development book and I understand how to get to a new view from a table but how exactly would I be able to get to a new view or view controller, by just simply pressing a button? Is that even possible? I mean there are some apps where you click a button, not a table cell and it loads a new view. How exactly is that done? If someone could help out a newbie it would be greatly appreciated!

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  • Getting fewer columns with hibernate

    - by Gandalf StormCrow
    I have a table with 11 columns, but I need to get only 2 of them in my application, I'm using spring/hibernate/DAO combination. For now I have a domain class which includes all 11 fields, and mapping file which maps all 11 columns in table. How do I use get just 2 of them not all?

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