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• Best performance approach to history mechanism?

  - by Royi Namir

  We are going to create History Mechanism for our changes in DB (DART in pic) via Triggers. we have 600 tables. Each record that will be changed - the trigger will insert the deleted one into XXX. regarding to the XXX : option 1 : clone each table in "Dart" DB and each table now will have a "sister table" e.g. : Table1 will have Table1_History problems : we will have 1200 tables programmer can do mistakes by working on wrong tables... option 2 : make a new DB (DART_2005 in pic) and the history tables will be there option 3 : use linked server which stores the Db which will contain the history tables. question : 1) which option gives the best performance ( I guess 3 is not - but is it 1 or 2 or same ?) 2) Does option 2 is acting like "linked server" ( in queries we will need to select from both DB's...) 3) What is the best practice approach ?

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• Month to Date in SQL Server 2008

  - by Aaron Smith

  Hopefully this will be an easy one to answer. I am working on a table that requires MTD data. One of our SQL guys told me to use MONTH (@monthtodate)= 11 Where @monthtodate is set to GetDate() in the parameter list in SQL Server Management Studio. So in "theory", he says, it should select the month (11) and then get today and return all the requested data in between those two dates. But I'm thinking this isn't correct. In looking at my data I'm starting to think that It's just returning data for the whole month of November instead of just MTD. I guess, technically, anything that has 0 won't be calculated. However that just means it's poorly written code correct? In your opinions, would this be the better way to return MTD data: production_date <= @today and Production_Date >= DATEADD(mm, DATEDIFF(mm, 0, @today), 0) Thanks in advance everyone!

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• option & jQuery .click() won't work together

  - by meow

  Hello, this works great in FF but not in IE, Chrome or Safari. $('#countryDropDown option').click(function() { var countryID = $(this).val(); dostuff(); }); // countryDropDown = id of select So, as you can see I want to attach a click event to each option. I alos tried var allOpts = $('#countryDropDown option'), l = allOpts.length, i = 0; for (i = 0; i < l; i += 1) { $(allOpts[i]).click(function() { var countryID = $(this).val(); doStuff(); }); } It still does not want to work in any other browser but FF. What am I doing wrong? Thanks

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• SQL help - find the table that has 'somefieldId' as the primary key?

  - by Kettenbach

  Hello All, How can I search my sql database for a table that contains a field 'tiEntityId'. This field is referenced in a stored procedure, but I am unable to identify which table this id is a primary key for? Any suggestions? I currently look through stored procedure definitions for references to text by using something like this Declare @Search varchar(255) SET @Search='[10.10.100.50]' SELECT DISTINCT o.name AS Object_Name,o.type_desc FROM sys.sql_modules m INNER JOIN sys.objects o ON m.object_id=o.object_id WHERE m.definition Like '%'+@Search+'%' ORDER BY 2,1 Any SQL guru's out there know what I need to use to find the table that contains the field, 'preferably the table where that field is the Primary Key. Thanks so much for any tips. Cheers, ~ck in San Diego

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• How to know the Geometry coordinates for google Maps

  - by Sam

  I found a sample script on Google Code about : Google Maps Javascript API V3 Overlays - http://code.google.com/apis/maps/documentation/javascript/overlays.html#OverlaysOverview And I want to apply this code to other countries (France, spain...) but I don't know where/how to find the Geometry code like in this script (see commented line) Here is the code: var australia = new google.maps.LatLng(-25, 133); map = new google.maps.Map(document.getElementById('map_canvas'), { center: australia, zoom: 4, mapTypeId: google.maps.MapTypeId.ROADMAP }); layer = new google.maps.FusionTablesLayer({ query: { select: 'geometry', from: '815230' // This one }, styles: [{ polygonOptions: { fillColor: "#00FF00", fillOpacity: 0.3 } }, { where: "birds > 300", polygonOptions: { fillColor: "#0000FF" } }, { where: "population > 5", polygonOptions: { fillOpacity: 1.0 } }] }); layer.setMap(map); P.S. I tried to change the google.maps.LatLng(-25, 133) to France Lat&Long but this is used only to center the map on that position. Thank you for your help

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• MySQL: Get unique values across multiple columns in alphabetical order

  - by RuCh

  Hey everyone, If my table looks like this: id | colA | colB | colC =========================== 1 | red | blue | yellow 2 | orange | red | red 3 | orange | blue | cyan What SELECT query do I run such that the results returned are: blue, cyan, orange, red, yellow Basically, I want to extract a collective list of distinct values across multiple columns and return them in alphabetical order. I am not concerned with performance optimization, because the results are being parsed to an XML file that will serve as a cache (database is hardly updated). So even a dirty solution would be fine. Thanks for any help!

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• Equivalent of Switch Statement in MySql 5

  - by Robert Gowland

  Using MySql 5, I have a task where I need to update one table based on the contents of another table. For example, I need to add 'A1' to table 'A' if table 'B' contains 'B1'. I need to add 'A2a' and 'A2b' to table 'A' if table 'B' contains 'B2', etc.. In our case, the value in table 'B' we're interested is an enum. Right now I have a stored procedure containing a series of statements like: INSERT INTO A SELECT 'A1' FROM B WHERE B.Value = 'B1'; --Repeat for 'B2' -> 'A2a', 'A2b'; 'B3' -> 'A3', etc... Is there a nicer more DRY way of accomplishing this?

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• Silverlight Cascading Combobox

  - by lidermin

  Hi, I have an issue trying to implement cascading comboboxes on Silverlight 3. I have two comboboxes: Product Type Sub Cathegory The user need to select the Product type, and based on his selection, the second combobox must load the sub cathegories. Binding the first combobox is a piece of cake: <ComboBox x:Name="cmbProductType" Margin="11,2,8,5" MaxDropDownHeight="100" Grid.Column="1 /> cmbProductType.ItemsSource = objFactory.ProductTypes; objFactory.Load(objFactory.GetProductTypesQuery()); My issue is trying to load the second combobox based on the first seleccion. I tryied to implement the SelectionChanged event on the first combobox, but it didn't worked for me: private void cmbProductType_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e) { FactoryDS objFactory = new FactoryDS(); cmbSubCat.ItemsSource = objFactMetas.Campos; objFactory.Load(objFactory.GetSubCathegoryQuery(((SybCathegroy)cmbProductType.SelectedItem).Id)); } How should I do this? (I'm new on Silverlight). thanks in advance.

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• PHP PDO fetch null

  - by Jacob

  How do you check if a columns value is null? Example code: $db = DBCxn::getCxn(); $sql = "SELECT exercise_id, author_id, submission, result, submission_time, total_rating_votes, total_rating_values FROM submissions LEFT OUTER JOIN submission_ratings ON submissions.exercise_id=submission_ratings.exercise_id WHERE id=:id"; $st = $db->prepare($sql); $st->bindParam(":id", $this->id, PDO::PARAM_INT); $st->execute(); $row = $st->fetch(); if($this->total_rating_votes == null) // this doesn't seem to work even though there is no record in submission_ratings???? { ... }

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• Drop down value setting

  - by Harish

  Whenever a new window is opened and the drop value by default is 'yyyy'(For eg: yyyy for years), onclick of the drop down the value should automatically change to current year, which will be one of the values in the dropdown list (any place in the drop down). So now the value will be set to the current year. Again if the user clicks on the dropdown, the user can change the value to any(For eg: select 'yyyy'). So now the value set in drop down is 'yyyy'. condition 3, if the user clicks on the drop down since the value is 'yyyy' , focus should be the current year and also the value automatically. Please give the sloution for the mentioned requirement????

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• Different Paramater Value Results In Slow Query

  - by alphadogg

  I have an sproc in SQL Server 2008. It basically builds a string, and then runs the query using EXEC(): SELECT * FROM [dbo].[StaffRequestExtInfo] WITH(nolock,readuncommitted) WHERE [NoteDt] < @EndDt AND [NoteTypeCode] = @RequestTypeO AND ([FNoteDt] >= @StartDt AND [FNoteDt] <= @EndDt) AND [FStaffID] = @StaffID AND [FNoteTypeCode]<>@RequestTypeC ORDER BY [LocName] ASC,[NoteID] ASC,[CNoteDt] ASC All but @RequestTypeO and @RequestTypeF are passed in as sproc parameters. The other two are built from a parameter into local variables. Normally, the query runs under one second. However, for one particular value of @StaffID, the execution plan is different and about 30x slower. In either case, the amount of data returned is generally the same, but execution time goes way up. I tried to recompile the sproc. I also tried to "copy" @StaffID into a local @LocalStaffID. Neither approach made any difference. Any ideas?

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• Can I use SQL to update multiple rows with multiple values from another table?

  - by stu

  I've got a one to many table with ids and traits for those users. I want to copy one user's settings to another. userid trait onoff ------ ----- ----- 1 1 on 1 2 on 1 3 on 1 4 on 2 1 off 2 2 off 2 3 off 2 4 off So I want to copy the onoff values from user 1 to 2, so that user2 has everything on when I'm done. update table set onoff = (select onoff from table where userid=1) where userid=2 that's the basic idea, but obviously doesn't work. I imagine I want the server to think in terms of a correlated subquery, but the outer part isn't a query, it's an update. Is this even possible in one step?

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• I cannot get this Jquery Image ComboBox to Work

  - by WillingLearner

  Im trying to use this plugin: http://www.marghoobsuleman.com/jquery-image-dropdown I cannot get it to work in my file. I copied and pasted the code from the example files and made the necessary links to the js and css files just to test, and i still cant get it to work. Everytime i run it, i get this error: Error: Result of expression '$(".mydds").msDropDown' [undefined] is not a function The script im using to run the file is: <script language="javascript" type="text/javascript"> function showvalue(arg) { alert(arg); //arg.visible(false); } $(document).ready(function() { try { oHandler = $(".mydds").msDropDown().data("dd"); oHandler.visible(true); //alert($.msDropDown.version); //$.msDropDown.create("body select"); $("#ver").html($.msDropDown.version); } catch(e) { alert("Error: "+e.message); } }) </script> Why am I getting these errors and how can I fix it?

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• Custom Grid LINQ to SQL help

  - by user488361

  Following is my custome cotrol grid... public partial class LinqGrid : UserControl { object tmpDataTable = new object(); public LinqGrid() { InitializeComponent(); } public void Bind(System.Data.Linq.Table listSource) where T : class { Project.dbClassesDataContext dbc = new Project.dbClassesDataContext(); tmpDataTable = listSource; var query = (from c in listSource select c); dgvRecords.DataSource = query.Take(10).ToList(); } private void btnNext_Click(object sender, EventArgs e) { // now what i have to do here if i want next 10 records.....means how to retrive tmpDataTable object here... ??? i can't find Type of variable....?? plz help me.... } }

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• update a column in input file by taking value from Database in perl.

  - by Rahul Singh

  input file: 1,a,USA,, 2,b,UK,, 3,c,USA,, i want to update the 4th column in the input file from taking values from one of the table. my code looks like this: my $customer_dbh = DBI-connect("DBI:Oracle:$INST", $USER, $PASS ) or die "Couldn't connect to datbase $INST"; my $cust_smh; print "connected \n "; open FILE , "+$input_file" or die "can't open the input file"; print "echo \n"; while(my $line=) { my @line_a=split(/\,/,$line); my $customer_id=$line_a[3]; print "$customer_id\n"; $cust_smh = $customer_dbh-prepare("SELECT phone_no from book where number = $line_a[0]"); $cust_smh-execute() or die "Couldn't execute stmt, error : $DBI::errstr"; my $number = $cust_smh-fetchrow_array(); $line_a[3]=$number; }

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• Linq DataContext.Log - logging sql comman with parameters

  - by dzajdol

  Hi. I using Linq DataContext.Log and I want to save sql command with parameters. how may I do this?? Now to log is writing: SELECT [t0].[Id_User], [t0].[FirstName], [t0].[LastName], [t0].[UserName], [t0].[Password], [t0].[District_Id], [t0].[Active], [t0].[MobileDevice_Id], [t0].[IsMobile], [t0].[IsWWW], [t0].[IsWholesaler], [t0].[Acc_Admin], [t0].[Warehouse_Id], [t0].[PIN], [t0].[ValidFrom], [t0].[ValidTo], [t0].[IsExternal], [t0].[UserType], [t0].[DefaultDepartment_Id], [t0].[Code], [t0].[RowsOnPage], [t0].[ClientGroup_Id], [t0].[ClientGroup2_Id], [t0].[ServerHash], [t0].[CanOrderInPacks], [t0].[Email], [t0].[IsAdmin], [t0].[HasAccessToAllInferiorsData], [t0].[IsSupplier], [t0].[Position], [t0].[syncstamp] AS [Syncstamp], [t0].[Source], [t0].[Deleted], [t0].[DefaultClient_Id] FROM [dbo].[Users] AS [t0] WHERE ([t0].[UserName] = @p0) AND ([t0].[Deleted] = @p1) I want write @p0 and @p1 to log Regards

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• MySQL - Selecting rows with a minimum number of occurences

  - by RC

  Hi all, I have this query: SELECT DISTINCT brand_name FROM masterdata WHERE in_stock = '1' ORDER BY brand_name It works well, except that I get far too many results. How do I limit this such that rather than just looking for distinct entries, it will only give me distinct entries that exist a minimum of 3 times (for example)? Basically, if the column had this data... brand_name ========== apple banana apple apple orange banana orange orange ...my current query would return "apple, banana, orange". How do I get it such that it only returns "apple, orange" (ignoring banana because it has less than three occurrences)? I'm using PHP to build the query, if it matters. Thanks!

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• Connect to a MySQL database and count the number of rows.

  - by Hugo

  Hi there! I need to connect to a MySQL database and then show the number of rows. This is what I've got so far; <?php include "connect.php"; db_connect(); $result = mysql_query("SELECT * FROM hacker"); $num_rows = mysql_num_rows($result); echo $num_rows; ?> When I use that code I end up with this error; Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in C:\Documents and Settings\username\Desktop\xammp\htdocs\news2\results.php on line 10 Thanks in advance :D

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• MySQL Delete from 1 table, using multiple tables

  - by nute

  I would like to delete all the rows found by that query: SELECT cart_abandon.* FROM cart_abandon, cart_product, txn_product, users WHERE cart_abandon.cartid = cart_product.cartid AND cart_product.productid = txn_product.productid AND txn_product.username = users.username AND users.id = cart_abandon.userid AND txn_product.txndate >= cart_abandon.abandondate The thing to keep in mind is that the query here uses 4 different tables, however I only want to delete rows from 1 table (cart_abandon). Is there an easy way to do that? Maybe this: ? DELETE cart_abandon FROM cart_abandon, cart_product, txn_product, users WHERE cart_abandon.cartid = cart_product.cartid AND cart_product.productid = txn_product.productid AND txn_product.username = users.username AND users.id = cart_abandon.userid AND txn_product.txndate >= cart_abandon.abandondate Is that valid? Correct?

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• expand a varchar column very slowly , why?

  - by francs

  Hi We need to modify a column of a big product table , usually normall ddl statments will be excutely fast ,but the above ddl statmens takes about 10 minnutes?I wonder know the reason! I just want to expand a varchar column?The following is the detailsl --table size wapreader_log= select pg_size_pretty(pg_relation_size('log_foot_mark')); pg_size_pretty ---------------- 5441 MB (1 row) --table ddl wapreader_log= \d log_foot_mark Table "wapreader_log.log_foot_mark" Column | Type | Modifiers -------------+-----------------------------+----------- id | integer | not null create_time | timestamp without time zone | sky_id | integer | url | character varying(1000) | refer_url | character varying(1000) | source | character varying(64) | users | character varying(64) | userm | character varying(64) | usert | character varying(64) | ip | character varying(32) | module | character varying(64) | resource_id | character varying(100) | user_agent | character varying(128) | Indexes: "pk_log_footmark" PRIMARY KEY, btree (id) --alter column wapreader_log= \timing Timing is on. wapreader_log= ALTER TABLE wapreader_log.log_foot_mark ALTER column user_agent TYPE character varying(256); ALTER TABLE Time: 603504.835 ms

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• In html <a href> tag, how to call servlet before opening file dialog for download (save as)?

  - by deepthinker121

  Hi All, I am developing a web-app where I want to provide a download link to users - so they can download a zip file from my server. Now, my requirement is that I want to execute some processing logic contained in a servlet before displaying the file dialog to the user for 'zip' files. So If I write <a href="abc.zip".......> then it opens a file dialog asking the user to select the location where this file can be saved But if I want a servlet's doGet method to do some preprocessing - say like building the zip file , then how can I first call the servlet and then open the file dialog. Will the following snippet work? <a href="MyHandlerServlet;abc.zip".......> Thanks for your help !!

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• Downloading HTTP URLs asynchronously in C++

  - by Joey Adams

  What's a good way to download HTTP URLs (e.g. such as http://0.0.0.0/foo.htm ) in C++ on Linux ? I strongly prefer something asynchronous. My program will have an event loop that repeatedly initiates multiple (very small) downloads and acts on them when they finish (either by polling or being notified somehow). I would rather not have to spawn multiple threads/processes to accomplish this. That shouldn't be necessary. Should I look into libraries like libcurl? I suppose I could implement it manually with non-blocking TCP sockets and select() calls, but that would likely be less convenient.

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• I have a SID of a user account, and I want the SIDs of the groups it belongs to. (C#)

  - by JCCyC

  This has to be obtained from a remote machine. The following query works not for SIDs, but for group and account names. "SELECT GroupComponent FROM Win32_GroupUser WHERE PartComponent = \"Win32_UserAccount.Domain='" + accountDomain + "',Name='" + accountName + "'\"" The Win32_Group objects it returns come in the forms of strings, and they only have domain and name (even though Win32_Group has a SID property). I have this sinking feeling I'll have to: Turn the SID into an account name by querying Win32_SID; Perform the query above; Turn each of the resulting group names into SIDs by querying Win32_Group. PLEASE tell me there's a better way.

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• Can I prevent iPhone from using 3G under any circumstances?

  - by dageshi

  I'm writing a travel guide related app that will download large databases (60meg) potentially overseas, with the reachability code I can tell when a host is reachable via wifi or 3g BUT I'm worried that if for some reason the wifi connection breaks for a minute or so as some DSL connections are likely to do on occasion the iphone will switch transparently to 3G and without realising I could be racking up someones phone bill with overseas data charges! So I'm wondering if anyone has any experience, in the event of such break in wifi connectivity (wifi still works but it's connection to the net is down) would the reachability code report ReachableViaWWAN? So I could wait till my download code returns, check how the host is currently reachable and if it's via 3g I could abort? Is it possible to select what type of connection I can use aka 3g or wifi exclusively?

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• Comparing date in access database

  - by Simon

  How can i compare the day in the access database to a given day in c#? The date column in the database is an general date(day/month/year) try { database = new OleDbConnection(connectionString); database.Open(); date = DateTime.Now.ToShortDateString(); string queryString = "SELECT user_name,zivila.naziv " + "FROM (users LEFT JOIN obroki_save ON obroki_save.ID_uporabnika=users.ID)" + " LEFT JOIN zivila ON zivila.ID=obroki_save.ID_zivila " + " WHERE users.ID= " + a.ToString() + " AND obroki_save.datum=# " + date; loadDataGrid(queryString); } catch (Exception ex) { MessageBox.Show(ex.Message); return; }

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