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  • SQL Query with ORDER BY Part 2

    - by Brett
    Hi SQL'ers, This is a followup question to: SQL Query with ORDER BY But I think the SQL logic is going to be quite different, so I am posting it as separate question. I am trying to extend my sql SELECT query it and having some trouble: I have the table: id type radius ------------------------- 1 type1 0.25 2 type2 0.59 3 type1 0.26 4 type1 0.78 5 type3 0.12 6 type2 0.45 7 type3 0.22 8 type3 0.98 and I am trying to learn how to SELECT the second smallest radius for each given type. So the returned recordset should look like: id type radius ------------------------- 3 type1 0.26 2 type2 0.59 7 type3 0.22 (Note: in the referenced question, I was looking for the lowest radius, not the second lowest radius). I am assuming I have to use LIMIT and OFFSET, but if I use the MIN() won't that return a distinct record containing the minimum radius? Does anyone have any thoughts on how to attack this? Many thanks, Brett

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  • Django/MySQL - __istartswith not producing case-insensitive query.

    - by TheLizardKing
    I make use of generic views and I am attempting to query my MySQL db (utf8_bin collation) in a case insensitive manor to try to find all my song titles that start with a particular letter. view.py def tracks_by_title(request, starts_with): return object_list( request, queryset = Track.objects.filter(title__istartswith=starts_with), template_name = 'tlkmusic_base/titles_list.html', template_object_name = 'tracks', paginate_by = 25, ) and my urls.py urlpatterns = patterns('tlkmusic.apps.tlkmusic_base.views', (r'^titles/(?P<starts_with>\w)/$', tracks_by_title), ) the query it produces according to the django debug toolbar is: SELECT `tracks`.`id`, `tracks`.`url`, `tracks`.`artist`, `tracks`.`album`, `tracks`.`genre`, `tracks`.`year`, `tracks`.`title`, `tracks`.`comment`, `tracks`.`tracknumber`, `tracks`.`discnumber`, `tracks`.`bitrate`, `tracks`.`length`, `tracks`.`samplerate`, `tracks`.`filesize`, `tracks`.`createdate`, `tracks`.`modifydate` FROM `tracks` WHERE `tracks`.`title` LIKE a% LIMIT 1 specifically this line: WHERE `tracks`.`title` LIKE a% LIMIT 1 Why is it not ILIKE which is what I was expecting by using __istartswith? I am using Django 1.1.1 on Ubuntu.

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  • Django IN query as a string result - invalid literal for int() with base 10

    - by bmelton
    Trying to query a 'Favorites' model to get a list of items a user has favorited, and then querying against a different model to get the objects back from that query to present to the template, but I'm getting an error: "invalid literal for int() with base 10" Looking over all of the other instances of that error, I couldn't find any in which the asker actually wanted to work with a comma separated list of integers, so I'm kind of at a loss. Model class Favorite(models.Model): # key should be the model name, id is the model.id, and user is the User object. key = models.CharField(max_length=255, unique=True) val = models.IntegerField(default=0) user = models.ForeignKey(User) class Admin: list_display = ('key', 'id', 'user') View def index(request): favorites = Favorite.objects.filter(key='blog', user=request.user.pk) values = "" for favorite in favorites: values += "%s," % favorite.val #values = "[%s]" % values blogs = Blog.objects.filter(pk__in=values) return render_to_response('favorite/index.html', { "favorites" : favorites, "blogs" : blogs, "values" : values, }, context_instance=RequestContext(request) ) enter code here

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  • Additional/Optional query string parameters in URI Template in WCF

    - by Rajesh Kumar
    I have written a simple REST Service in WCF in which I have created 2 method using same URI Template but with different Method(POST and GET). For GET method I am also sending additional query parameters as follows: [WebInvoke(Method = "POST", UriTemplate = "users")] [OperationContract] public bool CreateUserAccount(User user) { //do something return restult; } [WebGet(UriTemplate = "users?userid={userid}&username={userName}")] [OperationContract] public User GetUser(int userid, string userName) { // if User ID then // Get User By UserID //else if User Name then // Get User By User Name //if no paramter then do something } when I call CreateUserAccount with method POST it is working fine but when I call GetUser method using GET and sending only one query string parameter(userID or UserName) it is giving error "HTTP Method not allowed" but if send both parameters its wokrs fine. Can anyone help me?

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  • excel import query error

    - by pmms
    mysql_connect("localhost","root",""); mysql_select_db("hitnrunf_db"); $result=mysql_query("select * from jos_users INTO OUTFILE 'users.csv' FIELDS ESCAPED BY '""' TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' "); header("Content-type: text/plain"); header("Content-Disposition: attachment; filename=your_desired_name.xls"); header("Content-Transfer-Encoding: binary"); header("Pragma: no-cache"); header("Expires: 0"); print "$header\n$data"; in the above code in query string i.e string in side mysql_quey we are getting following error Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING in C:\wamp\www\samples\mysql_excel\exel_outfile.php on line 8 in query string '\n' charter is not identifying as string thats why above error getting

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  • SQL Server 2005 Error 701 - out of memory

    - by Tufo
    I'm currently having following error message when executing a .sql file with about 26MB on SQL Server 2005: Msg 701, Level 17, State 123 There is insufficient system memory to run this query. I'm working with 4GB RAM, 64Bit Windows 7 Ultimate, Core2Duo T6400(2GHz)... Is there a way to execute it without receiving this message (maybe force SQL Server to use swap file?) or a way to execute it in parts (like 100 queries a time)... The file is basically a CREATE TABLE followed by thousads of INSERT queries and I have a lot of those (converted .DBF files to SQL queries using ABC DBF Converter) Any idea will be very appreciated!

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  • how to select the min value using having key word

    - by LOVE_KING
    I have created the table stu_dep_det CREATE TABLE `stu_dept_cs` ( `s_d_id` int(10) unsigned NOT NULL auto_increment, `stu_name` varchar(15) , `gender` varchar(15) , `address` varchar(15),`reg_no` int(10) , `ex_no` varchar(10) , `mark1` varchar(10) , `mark2` varchar(15) , `mark3` varchar(15) , `total` varchar(15) , `avg` double(2,0), PRIMARY KEY (`s_d_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC AUTO_INCREMENT=8 ; then Inserted the values INSERT INTO `stu_dept_cs` (`s_d_id`, `stu_name`, `gender`, `address`, `reg_no`, `ex_no`, `mark1`, `mark2`, `mark3`, `total`, `avg`) VALUES (1, 'alex', 'm', 'chennai', 5001, 's1', '70', '90', '95', '255', 85), (2, 'peter', 'm', 'chennai', 5002, 's1', '80', '70', '90', '240', 80), (6, 'parv', 'f', 'mumbai', 5003, 's1', '88', '60', '80', '228', 76), (7, 'basu', 'm', 'kolkatta', 5004, 's1', '85', '95', '56', '236', 79); I want to select the min(avg) using having keyword and I have used the following sql statement SELECT * FROM stu_dept_cs s having min(avg) Is it correct or not plz write the correct ans....

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  • SharePoint's CAML query the "Created By" field with username

    - by yellowblood
    Hey, I have a form for administrators where they insert a user name ("domain\name") and the code gets and sets some information out of it. It's a huge project and some of the lists contain the username as a string ("domain\name"), but some lists only count on the "Created By" column, which is auto-created. I want to know what's the fastest way to query these lists using the username string. I tried to use the same query as the one I use for the first kind of lists and it obviously didn't work - <Where><Eq><FieldRef Name='UserName'/><Value Type='Text'>domain\\username</Value></Eq></Where> Thank you.

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  • Problem with Linq query and date format

    - by Alan T
    Hi All I have a C# console application written using Visual Studio 2008. My system culture is en-GB. I have a Linq query that looks like this: var myDate = "19-May-2010"; var cus = from x in _dataContext.testTable where x.CreateDate == Convert.ToDateTime(myDate) select x; The resulting SQL query generates and error because it returns the dates as "19/05/2010" which it interprets as an incorrect date. For some reason even though my system culture is set to en-GB it looks like it's trying to intrepret it as a en-US date. Any ideas how I get around this? Thanks. Alan T

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  • SQL Self Join Query Help

    - by hdoe123
    Hi All, I'm trying to work out a query that self join itself on a table using the eventnumber. I've never done a self join before. What i'm trying to query is when a client has started off in a city which is chester to see what city they moved to. But I dont want to be able to see if they started off in another city. I would also like be only see the move once (So i'd only like to see if they went from chester to london rather then chester to london to wales) The StartTimeDate is the same EndDateTime if they moved to another city. Data example as follows if they started off in the city chester :- clientid EventNumber City StartDateTime EndDateTime 1 1 Chester 10/03/2009 11/04/2010 13:00 1 1 Liverpool 11/04/2010 13:00 30/06/2010 16:00 1 1 Wales 30/07/2010 16:00 the result I would like to see is on the 2nd row - so it only shows me liverpool. Could anyone point in the right direcetion please?

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  • Adjust SQL query to DB2

    - by Guy Roth
    Part of a complex query that our app is running contains the lines: ...(inner query) SELECT ... NULL as column_A, NULL as column_B, ... FROM ... This syntax of creating columns with null values is not allowed in DB2 altough it is totally OK in MSSQL and Oracle DBs. Technically I can change it to: '' as column_A, '' as column_B, But this doesn't have exactly the same meaning and can damage our calculation results. How can I create columns with null values in DB2 using other syntax??

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  • Multiple join query in eSql

    - by Syma
    Hi guys, This is my first question in stackoverflow but really not the first time to get solution here. I am struggling with multiple join in entity framework 4. I have three tables (Accounts, Users and AccountUsers) that am finding difficult to query. What I want is to get all the users for the provided accountId including the account creator. I can get all the account users with no problem but the hard side for me is getting the account creator since it's not added to AccountUsers table. below is a quick preview how the tables are related. Accounts AccountId UserId (account creator) ...other columns Users UserId ...other columns AccountUsers AccountId UserId I would prefer the query to be esql, but Linq to Entities will do. I trust you guys on stackoverflow, so I know this won't take long to get the 'Answer' mark. Thanks for even reading.

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  • Simple MySQL Query taking 45 seconds (Gets a record and its "latest" child record)

    - by Brian Lacy
    I have a query which gets a customer and the latest transaction for that customer. Currently this query takes over 45 seconds for 1000 records. This is especially problematic because the script itself may need to be executed as frequently as once per minute! I believe using subqueries may be the answer, but I've had trouble constructing it to actually give me the results I need. SELECT customer.CustID, customer.leadid, customer.Email, customer.FirstName, customer.LastName, transaction.*, MAX(transaction.TransDate) AS LastTransDate FROM customer INNER JOIN transaction ON transaction.CustID = customer.CustID WHERE customer.Email = '".$email."' GROUP BY customer.CustID ORDER BY LastTransDate LIMIT 1000 I really need to get this figured out ASAP. Any help would be greatly appreciated!

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  • Zend Framework - applying order by on a nested query

    - by Gublooo
    Hey guys This might be a very simple thing. Check out the normal sql query below (select * from shopping order by shopping_id desc limit 5) order by RAND() This query runs successfully in mysql - not sure if this is the right way of doing it - but it works. It gets the last 5 ids from shopping table and randomly orders them everytime I want to achieve this in Zend. I'm not sure how to execute the first part and then apply the RAND clause to the results - what I have below does not do that. $select = $this-select() -from(array('sh'='shopping')) -order('shopping_id desc') -limit(5) -order('RAND()');

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  • sqlite select query round of double value

    - by Scorpion
    I have stored location in my sqlite database. CREATE TABLE city ( latitude NUMERIC, longitude NUMERIC ) Below are the value :- latitude = 41.0776605;//actual value in db - NUMERIC stored as DB longitude = -74.170086;//actual value in db - NUMERIC stored as DB final String query = "SELECT * FROM city"; cursor = myDataBase.rawQuery(query, null); if (null != cursor) { while (cursor.moveToNext()) { Log.i(TAG, "Latitude == " + cursor.getDouble(cursor.getColumnIndex("latitude"))); Log.i(TAG, "Longitude == " + cursor.getDouble(cursor.getColumnIndex("longitude"))); } } Result :- Latitude = 40.4127 Longitude = -74.25252 I don't want round off this values. Is there any way to solve this problem.

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  • JPA optimistic lock - setting @Version to entity class cause query to include VERSION as column

    - by masato-san
    I'm using JPA Toplink Essential, Netbean6.8, GlassFish v3 In my Entity class I added @Version annotation to enable optimistic locking at transaction commit however after I added the annotation, my query started including VERSION as column thus throwing SQL exception. None of this is mentioned in any tutorial I've seen so far. What could be wrong? Snippet public class MasatosanTest2 implements Serializable { private static final long serialVersionUID = 1L; @Id @Basic(optional = false) @Column(name = "id") private Integer id; @Column(name = "username") private String username; @Column(name = "note") private String note; //here adding Version @Version int version; query used: SELECT m FROM MasatosanTest2 m Internal Exception: com.microsoft.sqlserver.jdbc.SQLServerException Call: SELECT id, username, note, VERSION FROM MasatosanTest2

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  • Grouping a query with php

    - by Tom Hoad
    Basic question! I have 2 tables FRUIT id | fruit_name ------------------- 1 | Apple 2 | Banana 3 | Carrot VARIETIES id | fk_fruit_id | variety_name --------------------------------------- 1 1 Cox 2 1 Braeburn 3 2 Chester 4 3 Kotaka 5 3 Imperial 6 3 Oneal I'd like to output a list of varieties per fruit e.g. APPLE - Cox, Braeburn BANANA - Chester CARROT - Kotaka, Imperial, Oneal My current code is $query = "SELECT * FROM produce, varieties WHERE produce.id = varieties.fk_fruit_id"; $result = mysql_query($query) or die('Error : ' . mysql_error()); while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) { $produce_fruit_code = $row['fruit_code']; $variety_name = $row['variety_name']; echo $produce_fruit_code.' - '.$variety_name.'<br/>'; } which outputs: Apple - Cox Apple - Braeburn Banana - Chester Carrot - Kotaka Carrot - Imperial Carrot - Oneal Not a million miles away, but still not there. Any help is much appreciated, thanks!

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  • Oracle - Parameterized Query has EXECUTIONS = PARSE_CALLS

    - by Cory Grimster
    We have a .NET application talking to Oracle 10g. Our DBA recently pulled a list of queries where executions is equal to parse_calls. We assumed that this would help us find all of the unparameterized queries in our code. Unexpectedly, the following query showed up near the top of this list, with 1,436,169 executions and 1,436,151 parses: SELECT bar.foocolumn FROM bartable bar, baztable baz WHERE bar.some_id = :someId AND baz.another_id = :anotherId AND baz.some_date BETWEEN bar.start_date AND (nvl(bar.end_date, baz.some_date + (1/84600)) - (1/84600)) Why is executions equal to parse_calls for this query?

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  • MVC and positional parameters in a query string

    - by Pete Nelson
    This is more of a question to satisfy my curiosity vs something I really need answered. Back in ASP.NET WebForms, I'd occasionally use a positional parameter in a query string if I only had to pass one thing to a page. For example: http://localhost/site/MyPage.aspx?ABCD1234 Then my code would look like this: string accountNumber = ""; if (Request.QueryString.Count > 0) accountNumber = Request.QueryString[0]; In MVC, can you pass a positional query string parameter to a controller method instead of accessing it through Request.QueryString?

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  • LINQ query and lambda expressions

    - by user329269
    I'm trying to write a LINQ query and am having problems. I'm not sure if lambda expressions are the answer or not but I think they may be. I have two combo boxes on my form: "State" and "Color". I want to select Widgets from my database based on the values of these two dropdowns. My widgets can be in one of the following states: Not Started, In Production, In Finishing, In Inventory, Sold. Widgets can have any color in the 'color' table in the database. The 'state' combobox has selections "Not Sold," "In Production/Finishing", "Not Started," "In Production," "In Finishing," "In Inventory," "Sold." (I hope these are self-explanatory.) The 'color' dropdown has "All Colors," and a separate item for each color in the database. How can I create a LINQ query to select the widgets I want from the database based on the dropdowns?

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  • MySQL slow query

    - by andrhamm
    SELECT items.item_id, items.category_id, items.title, items.description, items.quality, items.type, items.status, items.price, items.posted, items.modified, zip_code.state_prefix, zip_code.city, books.isbn13, books.isbn10, books.authors, books.publisher FROM ( ( items LEFT JOIN bookitems ON items.item_id = bookitems.item_id ) LEFT JOIN books ON books.isbn13 = bookitems.isbn13 ) LEFT JOIN zip_code ON zip_code.zip_code = items.item_zip WHERE items.rid = $rid` I am running this query to get the list of a user's items and their location. The zip_code table has over 40k records and this might be the issue. It currently takes up to 15 seconds to return a list of about 20 items! What can I do to make this query more efficient?

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  • Parameterized SQL statements vs. very simple method

    - by Philipp G
    When I started to write the first SQL-Statements in my programs I felt quite comfortable with protecting myself against SQL-Injection with a very simple method that a colleague showed me. It replaced all single quotes with two single quotes. So for example there is a searchfield in which you can enter a customername to search in the customertable. If you would enter Peter's Barbershop The SELECT Statement would look like SELECT * FROM Customers WHERE Customername = 'Peter''s Barbershop' If now an attacker would insert this: ';DROP TABLE FOO; -- The statement would look like: SELECT * FROM Customers WHERE Customername = ''';DROP TABLE FOO;--' It would not drop any table, but search the customertable for the customername ';DROP TABLE FOO;-- which, I suppose, won't be found ;-) Now after a while of writing statements and protecting myself against SQL-Injection with this method, I read that many developers use parameterized statements, but I never read an article where "our" method was used. So definitely there is a good reason for it. What scenarios would parameterized statements cover but our method doesn't? What are the advantages of parameterized statements compared to our method? Thanks Philipp

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