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  • Oracle custom sort

    - by Carter
    The query... select distinct name from myTable returns a bunch of values that start with the following character sequences... ADL* FG* FH* LAS* TWUP* Where '*' is the remainder of the string. I want to do an order by that sorts in the following manner... ADL* LAS* TWUP* FG* FH* But then I also want to sort within each name in the standard order by fashion. So, an example, if I have the following values LAS-21A TWUP-1 FG999 FH3 ADL99999 ADL88888 ADL77777 LAS2 I want it to be sorted like this... ADL77777 ADL88888 ADL99999 LAS2 TWUP-1 FG999 FH3 I initially thought I could accomplish this vias doing an order by decode(blah) with some like trickery inside of the decode but I've been unable to accomplish it. Any insights?

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  • How to JOIN a COUNT from a table, and then effect that COUNT with another JOIN

    - by jakenoble
    Hi I have three tables Post ID Name 1 'Something' 2 'Something else' 3 'One more' Comment ID PostId ProfileID Comment 1 1 1 'Hi my name is' 2 2 2 'I like cakes' 3 3 3 'I hate cakes' Profile ID Approved 1 1 2 0 3 1 I want to count the comments for a post where the profile for the comment is approved I can select the data from Post and then join a count from Comment fine. But this count should be dependent on if the Profile is approved or not. The results I am expecting is CommentCount PostId Count 1 1 2 0 3 1 Thanks for any help.

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  • Predicate problem in ToSelectList

    - by Stefanvds
    the ToSelectList method I have: public static IList<SelectListItem> ToSelectList<T>(this IEnumerable<T> itemsToMap, Func<T, string> textProperty, Func<T, string> valueProperty, Predicate<T> isSelected) { var result = new List<SelectListItem>(); foreach (var item in itemsToMap) { result.Add(new SelectListItem { Value = valueProperty(item), Text = textProperty(item), Selected = isSelected(item) }); } return result; } when I call this method here: public static List<SelectListItem> lesgeverList(int selectedID) { NASDataContext _db = new NASDataContext(); var lesg = (from l in _db.Lesgevers where l.LG_Naam != "leeg" orderby l.LG_Naam select l).ToSelectList(m => m.LG_Naam + " " + m.LG_Vnaam, m => m.LG_ID.ToString(), m => m.LG_ID == selectedID); return lesg.ToList(); } the selectlist I get has the selectedID as selected. now, when I want to have multiple selected items, I give a list of Lesgevers public static List<SelectListItem> lesgeverList(List<Lesgever> lg) { NASDataContext _db = new NASDataContext(); var test = (from l in _db.Lesgevers where l.LG_Naam != "leeg" && lg.Contains(l) orderby l.LG_Naam, l.LG_Vnaam select l).ToList(); var lesg = (from l in _db.Lesgevers where l.LG_Naam != "leeg" orderby l.LG_Naam, l.LG_Vnaam select l).ToSelectList(m => m.LG_Naam + " " + m.LG_Vnaam, m => m.LG_ID.ToString(), m => lg.Contains(m)); return lesg.ToList(); } the var test does return the Lesgevers that i have in the lg List, in my 'var lesg', there are no selectlistitem's selected at all. where is my mistake? :) how do I fix thix?

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  • Foreign key reference to a two-column primary key

    - by Adam Ernst
    One of my tables has a two-column primary key: CREATE TABLE tournament ( state CHAR(2) NOT NULL, year INT NOT NULL, etc..., PRIMARY KEY(state, year) ); I want a reference to the tournament table from another table, but I want this reference to be nullable. Here's how I might do it, imagining that a winner doesn't necessarily have a tournament: CREATE TABLE winner ( name VARCHAR NOT NULL, state CHAR(2) NULL, year INT NULL ); If state is null but year is not, or vice-versa, the table would be inconsistent. I believe the following FOREIGN KEY constraint fixes it: ALTER TABLE winner ADD CONSTRAINT FOREIGN KEY fk (name, state) REFERENCES tournament (name, state); Is this the proper way of enforcing consistency? Is this schema properly normalized?

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  • C# SqlDataReader = null?

    - by tom
    myConnection.Open(); SqlDataReader myreader; myreader = SqlCom.ExecuteReader(); int id = -1; ErrorBox.InnerHtml = "Username:" + sUserName + ":" + sPassword + ":<br/>"; while (myreader.HasRows) { id = (int)myreader["id"]; String sUser = (String)myreader["Username"]; String sPass = (String)myreader["Password"]; ErrorBox.InnerHtml += "UserId is <b>" + id + "</b> " + sUser + ":" + sPass + ":<br >"; Session["LoginID"] = id; Server.Transfer(ReturnPage); } if (id == -1) { ErrorBox.InnerHtml = "Incorrect Password"; } myConnection.Close(); I added a breakpoint at myreader = SqlCom.ExecuteReader(); and it keeps returning myreader as null and HasRows = False, but it does have rows. So, it keeps validating my login as incorrect since id = -1, Help?

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  • how to get mysql query as xml?

    - by mobibob
    I recall reading about XML support from MySql. Does anyone know how to get XML without writing code? My client-protocol expects XML and I have a data source that I can access from a web app (JSP using JDBC).

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  • Query that ignore the spaces.

    - by xRobot
    What's the best way to run a query so that spaces in the fields are ignored? For example the following queries.... SELECT * FROM mytable WHERE username = "JohnBobJones" SELECT * FROM mytable WHERE username = "John Bob Jones" . would find the following entries: John Bob Jones JohnBob Jones JohnBobJones . I am using php or python but I think this doesn't matter.

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  • Row Number for group by ?

    - by Damien Joe
    I have table structure like Category EmpName 1 Harry 1 John 1 Ford 2 James 2 Mark 2 Shane 3 Oliver 3 Ted I want results like Category EmpName RowNumber 1 Harry 1 1 John 2 1 Ford 3 2 James 1 2 Mark 2 2 Shane 3 3 Oliver 1 3 Ted 2 I am using db2 and row_number() is not working for different groups of records.

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  • Oracle TNS names not showing when adding new connection to sqldeveloper

    - by Americus
    Hello, I'm trying to connect to an oracle database with sqldeveloper. I've installed the .Net oracle drivers and placed the tnsnames.ora file at C:\Oracle\product\11.1.0\client_1\Network\Admin. I'm using the following format in tnsnames.ora. dev = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.XXX.XXX)(PORT = XXXX)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = idpdev2) ) ) In sqldeveloper, when I try to create a new connection, no tns names show up as options. Is there something I'm missing?

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  • How to select from tableA sum of grouped numbers from tableB above their sums average in Oracle?

    - by Nazgulled
    I have data like this: tableA.ID --------- 1 2 3 tableB.ID tableB.NUM -------------------- 1 10 1 15 2 18 3 12 2 15 3 13 1 12 I need to select tableA IDs where the sum of their NUMs in tableB is above the average of all tableA IDs sums. In other words: SUM ID=1 -> 10+15+12 = 37 SUM ID=2 -> 18+12+15 = 45 SUM ID=3 -> 12+13 = 25 AVG ALL IDs -> (37+45+25)/3 = 35 The SELECT must only show ID 1 and 2 because 37 35, 45 35 but 25 < 35. This is my current query which is working fine: SELECT tableA.ID FROM tableA, tableB WHERE tableA.ID = tableB.ID HAVING SUM(tableB.NUM) > ( SELECT AVG(MY_SUM) FROM ( SELECT SUM(tableB.NUM) MY_SUM FROM tableA, tableB WHERE tableA.ID = tableB.ID GROUP BY tableA.ID ) ) GROUP BY tableA.ID But I have a feeling there might be a better way without all those nested SELECTs. Perhaps 2, but 3 feels like too much. I'm probably wrong though. For instance, why can't I do something simple like this: SELECT tableA.ID FROM tableA, tableB WHERE tableA.ID = tableB.ID HAVING SUM(tableB.NUM) > AVG(SUM(tableB.NUM)) GROUP BY tableA.ID Or this: SELECT tableA.ID, SUM(tableB.NUM) MY_SUM FROM tableA, tableB WHERE tableA.ID = tableB.ID HAVING MY_SUM > AVG(MY_SUM) GROUP BY tableA.ID

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  • mdx datediff error

    - by Roberto Durand
    select measures.name datediff("d", [Fecha].[Date].currentmember.member_value, [Dim Date].[Date].currentmember.member_value) on 1 from cube Error: Execution of the managed stored procedure datediff failed with the following error: Exception has been thrown by the target of an invocation.Argument 'Date1' cannot be converted to type 'Date' Is there any requirements to do datediff in mdx? In the dimension these member are defined as datetime, not sure if this influence in anyway the result...

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  • Prevent full table scan for query with multiple where clauses

    - by Dave Jarvis
    A while ago I posted a message about optimizing a query in MySQL. I have since ported the data and query to PostgreSQL, but now PostgreSQL has the same problem. The solution in MySQL was to force the optimizer to not optimize using STRAIGHT_JOIN. PostgreSQL offers no such option. Here is the explain: Here is the query: SELECT avg(d.amount) AS amount, y.year FROM station s, station_district sd, year_ref y, month_ref m, daily d LEFT JOIN city c ON c.id = 10663 WHERE -- Find all the stations within a specific unit radius ... -- 6371.009 * SQRT( POW(RADIANS(c.latitude_decimal - s.latitude_decimal), 2) + (COS(RADIANS(c.latitude_decimal + s.latitude_decimal) / 2) * POW(RADIANS(c.longitude_decimal - s.longitude_decimal), 2)) ) <= 50 AND -- Ignore stations outside the given elevations -- s.elevation BETWEEN 0 AND 2000 AND sd.id = s.station_district_id AND -- Gather all known years for that station ... -- y.station_district_id = sd.id AND -- The data before 1900 is shaky; insufficient after 2009. -- y.year BETWEEN 1980 AND 2000 AND -- Filtered by all known months ... -- m.year_ref_id = y.id AND m.month = 12 AND -- Whittled down by category ... -- m.category_id = '001' AND -- Into the valid daily climate data. -- m.id = d.month_ref_id AND d.daily_flag_id <> 'M' GROUP BY y.year It appears as though PostgreSQL is looking at the DAILY table first, which is simply not the right way to go about this query as there are nearly 300 million rows. How do I force PostgreSQL to start at the CITY table? Thank you!

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  • How effective can this Tagging solution be?

    - by Pablo
    Im working on an image sharing site and want to implement tagging for the images. I've read Questions #20856 and #2504150 I have few concerns with the approach on the questions above. First of all it looks easy to link an image to a tag. However getting images by tag relation is not as easy. Not easy because you will have to get the image-to-tag relation from one table and then make a big query with a bunch of OR statements( one OR for every image). Before i even research the tagging topic i started testing the following method: This tables as examples: Table: Image Columns: ItemID, Title, Tags Table: Tag Columns: TagID, Name The Tags column in the Image table takes a string with multiple tagID from the Tag table enclosed by dashes(-). For example: -65-25-105- Links an image with the TagID 65,25 and 105. With this method i find it easier to get images by tag as i can get the TagID with one query and get all the images with another simple query like: SELECT * FROM Image WHERE Tags LIKE %-65-% So if i use this method for tagging, How effective this is? Is querying by LIKE %-65-% a slow process? What problems can i face in the future?

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  • MySQL stored procedure, handling multiple cursors and query results

    - by Tirithen
    How can I use two cursors in the same routine? If I remove the second cursor declaration and fetch loop everthing works fine. The routine is used for adding a friend in my webapp. It takes the id of the current user and the email of the friend we want to add as a friend, then it checks if the email has a corresponding user id and if no friend relation exists it will create one. Any other routine solution than this one would be great as well. DROP PROCEDURE IF EXISTS addNewFriend; DELIMITER // CREATE PROCEDURE addNewFriend(IN inUserId INT UNSIGNED, IN inFriendEmail VARCHAR(80)) BEGIN DECLARE tempFriendId INT UNSIGNED DEFAULT 0; DECLARE tempId INT UNSIGNED DEFAULT 0; DECLARE done INT DEFAULT 0; DECLARE cur CURSOR FOR SELECT id FROM users WHERE email = inFriendEmail; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1; OPEN cur; REPEAT FETCH cur INTO tempFriendId; UNTIL done = 1 END REPEAT; CLOSE cur; DECLARE cur CURSOR FOR SELECT user_id FROM users_friends WHERE user_id = tempFriendId OR friend_id = tempFriendId; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1; OPEN cur; REPEAT FETCH cur INTO tempId; UNTIL done = 1 END REPEAT; CLOSE cur; IF tempFriendId != 0 AND tempId != 0 THEN INSERT INTO users_friends (user_id, friend_id) VALUES(inUserId, tempFriendId); END IF; SELECT tempFriendId as friendId; END // DELIMITER ;

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  • Removing table prefixes on ASP.NET MVC DataModel entities

    - by Tim Shults
    My database tables have prefixes on them and when the DataModel generates the EntityObjects they have the prefixes at the beginning of the class name. Is there anyway that I can have those prefixes ignored when the DataModel is updating/creating the classes? I've found the below question, but with no solution. http://stackoverflow.com/questions/1800065/removing-table-prefix-in-linq2sql-setup/2525827#2525827 Thanks in advance, Tim Shults

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  • Problem with write query

    - by phenevo
    Hi, I've got collection of geo objects in database: There are four Tables: Countries Regions Provinces Cities Cities has inter alia ProvinceCode Provinces has inter alia regionCode Regions has inter alia CountryCode And there is fifth Table: Descriptions ObjectCode ObjectType(country, region, province, city) Description. How to get from Descriptions table, all descriptions from objects which are in the definite country ??

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  • LINQ error when deployed - Security Exception - cannot create DataContext

    - by aximili
    The code below works locally, but when I deploy it to the server it gives the following error. Security Exception Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. The code is protected void Page_Load(object sender, EventArgs e) { DataContext context = new DataContext(Global.ConnectionString); // <-- throws the exception //Table<Group> _kindergartensTable = context.GetTable<Group>(); Response.Write("ok"); } I have set full write permissons on all files and folders on the server. Any suggestions how to solve this problem? Thanks in advance.

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  • Relative path reference in WebConfig.ConnectionString

    - by Ngu Soon Hui
    Is it possible to specify a relative path reference in connectionstring, attachDbFileName property in a web.config? For example, In my database is located in the App_data folder, I can easily specify the AttachDBFilename as|DataDirectory|\mydb.mdf and the |Datadirectory| will automatically resolve to the correct path. Now, suppose that web.config file is located in A folder, but the database is located in B\App_data folder, where A and B folder is located in the same folder. Is there anyway to use relative path reference to resolve to the correct path?

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  • How to avoid using duplicate savepoint names in nested transactions in nested stored procs?

    - by Gary McGill
    I have a pattern that I almost always follow, where if I need to wrap up an operation in a transaction, I do this: BEGIN TRANSACTION SAVE TRANSACTION TX -- Stuff IF @error <> 0 ROLLBACK TRANSACTION TX COMMIT TRANSACTION That's served me well enough in the past, but after years of using this pattern (and copy-pasting the above code), I've suddenly discovered a flaw which comes as a complete shock. Quite often, I'll have a stored procedure calling other stored procedures, all of which use this same pattern. What I've discovered (to my cost) is that because I'm using the same savepoint name everywhere, I can get into a situation where my outer transaction is partially committed - precisely the opposite of the atomicity that I'm trying to achieve. I've put together an example that exhibits the problem. This is a single batch (no nested stored procs), and so it looks a little odd in that you probably wouldn't use the same savepoint name twice in the same batch, but my real-world scenario would be too confusing to post. CREATE TABLE Test (test INTEGER NOT NULL) BEGIN TRAN SAVE TRAN TX BEGIN TRAN SAVE TRAN TX INSERT INTO Test(test) VALUES (1) COMMIT TRAN TX BEGIN TRAN SAVE TRAN TX INSERT INTO Test(test) VALUES (2) COMMIT TRAN TX DELETE FROM Test ROLLBACK TRAN TX COMMIT TRAN TX SELECT * FROM Test DROP TABLE Test When I execute this, it lists one record, with value "1". In other words, even though I rolled back my outer transaction, a record was added to the table. What's happening is that the ROLLBACK TRANSACTION TX at the outer level is rolling back as far as the last SAVE TRANSACTION TX at the inner level. Now that I write this all out, I can see the logic behind it: the server is looking back through the log file, treating it as a linear stream of transactions; it doesn't understand the nesting/hierarchy implied by either the nesting of the transactions (or, in my real-world scenario, by the calls to other stored procedures). So, clearly, I need to start using unique savepoint names instead of blindly using "TX" everywhere. But - and this is where I finally get to the point - is there a way to do this in a copy-pastable way so that I can still use the same code everywhere? Can I auto-generate the savepoint name on the fly somehow? Is there a convention or best-practice for doing this sort of thing? It's not exactly hard to come up with a unique name every time you start a transaction (could base it off the SP name, or somesuch), but I do worry that eventually there would be a conflict - and you wouldn't know about it because rather than causing an error it just silently destroys your data... :-(

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