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  • How to find out whether SqlCe query Has rows?

    - by Tomas
    Hi, In my simple db I use SqlCe and I cannot figure out how to correctly find out whether the query has rows or not. HasRows does not work. So far I have this: _DbCommand.CommandText="SELECT * FROM X" SqlCeDataReader reader=_DbCommand.ExecuteQuery(); if (reader.FieldCount!=0) //I thought it could work (O rows - 0 fields?), but its true even with 0 rows { while (reader.Read()) { // } } Thanks

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  • Multi-Part form in Codeigniter

    - by Kevin Brown
    I'm building a survey w/ Codeigniter, and it's getting cumbersomely long...so I want to split it up into sections (about 5). If I want each section to validate, and submit to db after the user clicks "next", what is the best way to do this? I've never made a multi-step process before. Any advice for a noob? :)

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  • How to test crontab entry?

    - by Mark
    I have an entry in my crontab that looks like this: 0 3 * * * pg_dump mydb | gzip > ~/backup/db/$(date +%Y-%m-%d).psql.gz That script works perfectly when I execute it from the shell, but it doesn't seem to be running every night. I'm assuming there's something wrong with the permissions, maybe crontab is running under a different user or something. How can I debug this? I'm a shared hosting environment (WebFaction).

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  • How do I Store / Access Translations Efficiently?

    - by Gilbert
    I am trying to translate some of the phrases of my website into various languages. so, in my database, I have a table with rows of ID//text//dest_language//text_in_dest_language At the moment, I retreive each translation one by one: get text_in_dest_language where text="Hello World" and dest_languge="zh" This results in 40-50 db calls per page, which, on the app engine, is rather slow. What can I do to mitigate this slowdown?

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  • Will this SQL screw up

    - by Joshua
    I'm sure everyone knows the joys of concurrency when it comes to threading. Imagine the following scenario on every page-load on a noobily set up MySQL db: UPDATE stats SET visits = (visits+1) If a thousand users load the page at same time, will the count screw up? is this that table locking/row locking crap? Which one mysql use.

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  • Is it worth a try LINQ to SQL as a beginner to an ORM?

    - by Pandiya Chendur
    Thus far used sql server stored procedures for all my web applications... Now thought of moving to an ORM... I would like to ask SO users about LINQ to SQL Is Linq to sql worth a try as a beginner to an ORM? or should i look for some others... Any suggestion... EDIT: I have a sql server 2005 database with all tables.... How to use this db with Linq to sql?

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  • iPad / iPhone Sync (WLAN or Inet)

    - by tobi
    I have actually one app with a SQLite DB and i port this at the moment to the ipad. My idea is a sync between iPad and iPhone for one table... But the Problem is "Person A" edit/change, create or delete a data record on iphone and "Person B" make the same or delete the edited record from Person A on the same time. Has anybody a idea for this? Or a nice lib for this?

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  • mapping Field with variable type using Hibernate Annotaion

    - by Zahra
    Hi. how can I have a field with variable type in my class? I use hibernate annotation for mapping to DB. I tried to use java.io.Serializable as field's type, but it mapped to database as a 01 amount which is true if I get it's object and cast it to it's true type. but I need to run a query on this objects that needs true amount of field.(right now I can't compare an integer field with a number) Does anyone have any idea how can I do this? Thanks in advance.

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  • Does it make sense to fragment cache static partials

    - by ash34
    Hi, I have my views and layouts split into multiple partials, some of them are static partials i.e, no data from the database being displayed here. Does it make sense to cache these to prevent the erb templating system from generating the html each time or it only makes sense to cache in situations where something needs to be retrieved from the db each time. thanks, ash

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  • Accessing MySQL database from iphone

    - by Jayshree
    Hi i am trying to connect my iphone aap directly to the MySQL database. I did a lot of reading, and i found that by using MCPkit we can access the database. Now i also found that the mcpkit is not supported in iphone, while it runs in simulater. Can somebody tell me whats the deal with this. I know the other alternative is web services, but i have to directly connect to the DB. so please can somebody help me with this problem.

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  • Tree View in c# with recursive

    - by user188886
    hi there i have table in DB with 3 column = ParentId , Id , Text i wanna make Tree in C# by the Records that we have saved in this table i dont know how should i write my recursive method in c# please help me thanks

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  • calling a function in a click event

    - by KATy
    hi, i ve data in d sql DB using those values i ve to call a function in the system.. data in sql location of func:c:\ namespace:calci class name:arith function name:add parameter 1: 1 parameter 2: 2 now we ve use the values c:\,calci,arith,add,1,2 using this we ve to calculate the result.. thanx..

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  • DataSet v/s Database

    - by Hemanshu Bhojak
    While designing applications it is a very good practice to have all the business logic in one place. So why then we sometimes have the business logic in stored procs? Can we fetch all data from the DB and store it in a DataSet and then process it? What would be the performance of the app in this scenario?

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  • How do i convert a string to a JSON object in JQuery?

    - by Rob
    I have a string in my db I want to pull into my page and convert to a json object. [ {id: 1,title: "Long Event", start: new Date(2009, 5, 6, 14, 0),end: new Date(2009, 5, 11)}, {id: 2,title: "Repeating Event", start: new Date(2009, 5, 2)}, {id: 3,title: "Meeting", start: new Date(2009, 5, 20, 9, 0)}, {id: 4,title: "Click for Facebook", start: new Date(2009, 5, 27, 16),end: new Date(2009, 5, 29), url: "http://facebook.com/"} ] How can I do this using JQuery?

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  • What's the best, Escape then store Or store then escape the output?

    - by Axel
    Hi, After doing a long search on stackoverflow i didn't find any one talked about this even if it's a big choice, the Question is what's the best in order to prevent both of XSS and SQL injection, Escaping the data then store it in the DB or Store it as it is and escape when output it? Note: it is better if you give some examples of practics if possible. Thanks

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  • friendship database schema

    - by Daniel Hertz
    I'm creating a db schema that involves users that can be friends, and I was wondering what the best way to model the ability for these friends to have friendships. Should it be its own table that simply has two columns that each represent a user? Thanks!

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  • Error while running ASP site

    - by KSD
    Hi I have set Data Source(ODBC) for running ASP Site in my local Computer selected Microsoft Access Driver. Now I can run the whole site with out error.But If i apply leave then it will show an error. Microsoft OLE DB Provider for ODBC Drivers (0x80004005) [Microsoft][ODBC Microsoft Access Driver] Operation must use an updateable query. /eleave/leaveApplicationOut.asp, line 39

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  • Hibernate3: Self-Referencing Objects

    - by monojohnny
    Need some help on understanding how to do this; I'm going to be running recursive 'find' on a file system and I want to keep the information in a single DB table - with a self-referencing hierarchial structure: This is my DB Table structure I want to populate. DirObject Table: id int NOT NULL, name varchar(255) NOT NULL, parentid int NOT NULL); Here is the proposed Java Class I want to map (Fields only shown): public DirObject { int id; String name; DirObject parent; ... For the 'root' directory was going to use parentid=0; real ids will start at 1, and ideally I want hibernate to autogenerate the ids. Can somebody provide a suggested mapping file for this please; as a secondary question I thought about doing the Java Class like this instead: public DirObject { int id; String name; List<DirObject> subdirs; Could I use the same data model for either of these two methods ? (With a different mapping file of course). --- UPDATE: so I tried the mapping file suggested below (thanks!), repeated here for reference: <hibernate-mapping> <class name="my.proj.DirObject" table="category"> ... <set name="subDirs" lazy="true" inverse="true"> <key column="parentId"/> <one-to-many class="my.proj.DirObject"/> </set> <many-to-one name="parent" class="my.proj.DirObject" column="parentId" cascade="all" /> </class> ...and altered my Java class to have BOTH 'parentid' and 'getSubDirs' [returning a 'HashSet']. This appears to work - thanks, but this is the test code I used to drive this - I think I'm not doing something right here, because I thought Hibernate would take care of saving the subordinate objects in the Set without me having to do this explicitly ? DirObject dirobject=new DirObject(); dirobject.setName("/files"); dirobject.setParent(dirobject); DirObject d1, d2; d1=new DirObject(); d1.setName("subdir1"); d1.setParent(dirobject); d2=new DirObject(); d2.setName("subdir2"); d2.setParent(dirobject); HashSet<DirObject> subdirs=new HashSet<DirObject>(); subdirs.add(d1); subdirs.add(d2); dirobject.setSubdirs(subdirs); session.save(dirobject); session.save(d1); session.save(d2);

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  • Multiple dynamic method calls or declaring a variable in Grails

    - by user303979
    In my view, if I have a situation where I need to use a dynamic method (such as Domain.findByName("name")) in multiple places, would it be better to define a variable with and refer to that, rather than have the dynamic method in multiple places? I know this seems like an obvious answer, but I just wanted to make sure Grails doesn't cache it or something, and indeed two DB calls are being made.

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  • How can I correctly quote query parameters using DBI?

    - by imerez
    I am dumping the a number of things including the following into a db INSERT statement \"$rec->{reqHdrs}\" However when for example my value for reqHdrs contains quotes it causes the statement to end and thus cause invalid sql. e.g. bla;bla="http://www.yahoo.com/xhtml",bla bla How do I escape the double quotes inside this statement ?

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