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  • What is a 'better' approach to query/save from server: DTO or Wcf Data Services?

    - by bonefisher
    From my perspective, the Data Services and their query approach is useful when querying simple object graphs from your server-side domain model. But when you want to query complex dependencies I couldn't create anything good out of it. The classic DTO approach is fine-grained and can handle everything, but the downside is that you have to create Dto classes for every type of server-request which is time consuming and you have to synchronize the Dto type with your domain entity/business logic.

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  • How do I get results from a Linq query in the order of IDs that I provide?

    - by Keltex
    I'm looking to get query results back from Linq in the order that I pass IDs to the query. So it would look something like this: var IDs = new int [] { 5, 20, 10 } var items = from mytable in db.MyTable where IDs.Contains(mytable.mytableID) orderby // not sure what to do here select mytable; I'm hoping to get items in the order of IDs (5, 20, 10). (Note this is similar to this question, but I would like to do it in Linq instead of SQL)

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  • Can I write this query using the criteria API or am I stuck with HQL?

    - by Yannis
    hi all. I have the following query which I would like to write using the criteria api of NH. select status, count(1) from (select distinct Status, post_id from post_statistics) tbl group by status each post_id can exist multiple times in post_statistics e.g. id post_id status 1 1 open 1 1 edit 1 1 open 1 2 open so the query should return the following results: status count open 2 edit 1 thx in advance.

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  • What version of mongodb was full $text query operator introduced?

    - by Marc Maxson
    Stupid question, right? But the official docs for 'text index' say: http://docs.mongodb.org/manual/core/index-text/ Text Indexes New in version 2.4. To perform queries that access the text index, use the $text query operator. Whereas if you click on the help for searching the index you created with the $text operator, it reads: http://docs.mongodb.org/manual/reference/operator/query/text/#op._S_text $text New in version 2.6. Seems to be 2.4 but still having problems wiht it.

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  • Any way to make this PostgreSQL count query any faster?

    - by Ben Dauphinee
    I'm running a case-insensitive search on a table with 7.2 million rows, and I was wondering if there was any way to make this query any faster? Currently, it takes approx 11.6 seconds to execute, with just one search parameter, and I'm worried that as soon as I add more than one, this query will become massively slow. SELECT count(*) FROM "exif_parse" WHERE (description ~* 'canon')

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  • Where does the query language sit within the MVC pattern?

    - by weesilmania
    I'd assume that since the query language sits within the controller (typically) that it belongs to that component, but if I play devil's advocate I'd argue that the query language is execute within the domain of the model, and is tightly coupled to that component so it might also be a part of it. Anyone know the answer? Is there a straight answer or is it technology specific?

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  • PL/SQL 'select in' from a list of values whose type are different from the outer query

    - by Attilah
    I have the following tables : Table1 ( Col1 : varchar2, Col2 : number, Col3 : number) Table2 ( Col1 : number, Col2 : varchar2, Col3 : varchar2) I want to run a query like this : select distinct Col2 from Table1 where Col1 in ( select Col1 from Table2 ) Table1.Col1 is of type varchar2 while Table2.Col1 is of type number. so, I need to do some casting, it seems but it fails to succeed. The problem is that any attempts to run the query returns the following error : ORA-01722: invalid number 01722. 00000 - "invalid number" *Cause: *Action: Table1.Col1 contains some null values.

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  • How can I change column length using HQL query?

    - by gmugmu
    I tried session.createSQLQuery("ALTER TABLE People MODIFY address VARCHAR(1000);").executeUpdate(); but this throws org.hibernate.exception.SQLGrammarException: could not execute native bulk manipulation query After a lot of googling, the recommendation is to use HQL instead of SQL query to do bulk updates. Not sure how to use HQL to accomplish this. There seems to be no decent HQL documentation for updating column length in a table. Thanks so much for the help.

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  • Option To AutoFormat Query Syntax in SSMS 2005 or 2008?

    - by dragon77
    In TOAD (for SQL or Oracle), there is a simple AUTOFORMAT button that will nicely format your query - I couldn't find that option in SSMS 2005, but was advised by a co-worker that it was available in SSMS 2008. I am unable to locate the option there either. This is VERY helpful when pasting a query from another source. Thanks for any assistance.

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  • Help with simple query - why isn't an index being used?

    - by Randy Minder
    I have the following query: SELECT MAX([LastModifiedTime]) FROM Workflow There are approximately 400M rows in the Workflow table. There is an index on the LastModifiedTime column as follows: CREATE NONCLUSTERED INDEX [IX_Workflow_LastModifiedTime] ON [dbo].[Workflow] ( [LastModifiedTime] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 100) The above query takes 1.5 minutes to execute. Why wouldn't SQL Server use the above index and simply retrieve the last row in the index to get the maximum value? Thanks.

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  • How would I add an if statement into MSQLI query?

    - by Josh
    Okay so I'm just learning mysqli and I'm having a little trouble putting this code together. I've posted the mysqli query below and then below that is the code I'm trying to combine with the mysqli query and I can't seem to get it to work. Maybe what I'm doing isn't possible, but the third section below is how I had the query written for mysql and it's working fine. Answers in code are appreciated! Thanks! MYSQLI QUERY: <?php require("../config.php"); if ($stmt = $mysqli->prepare("SELECT firstname,lastname,spousefirst,phonecell,email,date,contacttype,status FROM contacts WHERE contacttype IN ('Buyer','Seller','Buyer / Seller','Investor') ORDER BY date DESC")) { $stmt->execute(); $stmt->bind_results($firstname,$lastname,$spousefirst,$phonecell,$email,$date,$contacttype,$status); while ($stmt->fetch()) { echo ''.$firstname.' '." ".' '.$lastname.' '.",".' '.$spousefirst.' '.",".' '.$phonecell.' '.",".' '.$email.' '.",".' '.$date.' '.",".' '.$contacttype.' '.",".' '.$status.'</br>'; } $stmt->close(); } $mysqli->close(); ?> WHAT I'M TRYING TO COMBINE THE ABOVE WITH: if (($_GET['date'] == 'today')) { $sql = "SELECT * FROM contacts WHERE contacttype IN ('Buyer','Seller','Buyer / Seller','Investor') AND date = DATE(NOW()) ORDER BY date DESC"; } WHAT I HAD BEFORE WITH MYSQL THAT WORKS: <?php require("../config.php"); $sql = "SELECT * FROM contacts WHERE contacttype IN ('Buyer','Seller','Buyer / Seller','Investor') AND status = 'New' ORDER BY date DESC"; if (($_GET['date'] == 'today')) { $sql = "SELECT * FROM contacts WHERE contacttype IN ('Buyer','Seller','Buyer / Seller','Investor') AND date = DATE(NOW()) ORDER BY date DESC"; } ?>

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  • Can IF be used to start a MySQL query?

    - by Littledot
    Hi there, I have a query that looks like this: mysql_query("IF EXISTS(SELECT * FROM predict WHERE uid=$i AND bid=$j) THEN UPDATE predict SET predict_tfidf=$predict_tfidf WHERE uid=$i AND bid=$j ELSE INSERT INTO predict (uid, bid, predict_tfidf) VALUES('$i','$j','$predict_tfidf') END IF")or die(mysql_error()); But it dies and mysql tells me to check the syntax near IF EXISTS(....) Can we not use an IF statement to start a mysql query? Thank you in advance.

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  • The least amount of code possible for this MySQL query?

    - by ddan
    I have a MySQL query that: gets data from three tables linked by unique id's. counts the number of games played in each category, from each user and counts the number of games each user has played that fall under the "fps" category It seems to me that this code could be a lot smaller. How would I go about making this query smaller. http://sqlfiddle.com/#!2/6d211/1 Any help is appreciated even if you just give me links to check out.

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  • How do I create a query which displays dots (....) after a certain number of characters within the field

    - by Marchese Il Chihuahua
    I would like to create a query on a field which after a certain number of characters adds/displays a number of dots to show the user that there is additional text to read. At the moment there is a syntax error using the following code in which it doesn't like the "Left" instruction: X:IIF(len(description) > 5, Left(description, 5) & "....", description) Note: "X" is what i am naming the field 'description' in my query screen in Access

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  • Is it faster to compute values in a query, call a Scalar Function (decimal(28,2) datatype) 4 times,

    - by Pulsehead
    I have a handful of queries I need to write in SQL Server 2005. Each Query will be calculating 4 unit cost values based on a handful of (up to 11) fields. Any time I want 1 of these 4 unit cost values, I'll want all 4. Which is quicker? Computing in the SQL Query ((a+b+c+d+e+f+g+h+i)/(j+k)), calling ComputeScalarUnitCost(datapoint.ID) 4 times, or joining to ComputeUnitCostTable(datapoint.ID) one time?

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  • Why is one query consistently ~25ms faster than another in postgres?

    - by Emory
    A friend wrote a query with the following condition: AND ( SELECT count(1) FROM users_alerts_status uas WHERE uas.alert_id = context_alert.alert_id AND uas.user_id = 18309 AND uas.status = 'read' ) = 0 Seeing this, I suggested we change it to: AND NOT EXISTS ( SELECT 1 FROM users_alerts_status uas WHERE uas.alert_id = context_alert.alert_id AND uas.user_id = 18309 AND uas.status = 'read' ) But in testing, the first version of the query is consistently between 20 and 30ms faster (we tested after restarting the server). Conceptually, what am I missing?

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  • why headers of query results display sometimes in button sometimes in links format ?

    - by I Like PHP
    Hello All, it's just my curiosity to know that why phpmyadmin behavior in different manner when we modify query a bit( putting extra space) then headers of query results, sometime comes in Button format( on hover it say sort, but sorting not working at all) and sometimes in blue link is there any difference for this or it just causing by some othe reason? i m attaching both images. Button headers Link headers

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