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  • Getting Null Pointer Exception while reading sqlite database

    - by user1597569
    I have to read values from SQLite database but getting null pointer exception when I execute private final String DB_NAME = "UserDb"; private final String TABLE_NAMES = "tbluser"; SQLiteDatabase sampleDB; Cursor c=null; c= sampleDB.rawQuery("SELECT * from " +TABLE_NAMES+" where did='"+deviceDec+"' ", null); Please suggest me why I am getting the exception because at one function it is running but in other it is not. and the deviceDec value also i am getting I have checked in Log

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  • Getting specific data from database

    - by ifsession
    I have a table called Categorie with a few columns and I'm trying to get only a few out of my database. So I've tried this: $sql = 'SELECT uppercat AS id, COUNT(uppercat) AS uppercat FROM categorie GROUP BY uppercat;'; $d = Yii::app()->db->createCommand($sql)->query(); But I find the output strange. I was trying to do an array_shift but I get an error that this isn't an array. When I do a var_dump on $d: object(CDbDataReader)[38] private '_statement' => object(PDOStatement)[37] public 'queryString' => string 'SELECT uppercat AS id, COUNT(uppercat) AS uppercat FROM categorie GROUP BY uppercat;' (length=100) private '_closed' => boolean false private '_row' => null private '_index' => int -1 private '_e' (CComponent) => null private '_m' (CComponent) => null Ok.. then I did a foreach on $d: array 'id' => string '0' (length=1) 'uppercat' => string '6' (length=1) array 'id' => string '3' (length=1) 'uppercat' => string '2' (length=1) array 'id' => string '6' (length=1) 'uppercat' => string '1' (length=1) array 'id' => string '7' (length=1) 'uppercat' => string '2' (length=1) array 'id' => string '9' (length=1) 'uppercat' => string '2' (length=1) Then why do I get the message that $d isn't an array while it contains arrays? Is there any other way on how to get some specific data out of my database and that I can then do an array_shift on them? I've also tried doing this with findAllBySql but then I can't reach my attribute for COUNT(uppercat) which is not in my model. I guess I'd have to add it to my model but I wouldn't like that because I need it just once.

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  • Change the logical name of sql server express 2005 database file?

    - by oob
    In Microsoft SQL Server Management Studio Express for Sql Server Express 2005, I needed to copy a database for testing and keep it on the same server as the old database. I did the following: Right Click on Databases Created new database Detached the database I wanted to copy "Restored" my new database from the backup file of my old database. I did this by clicking the 'Overwrite the existing database' box on the Options pane, and I changed the paths in the 'restore as' options so that they pointed to my new .mdf and .ldf files. Everything is working like I want. Problem is, when I right-click - Properties - Files on my new database, the logical name of the .mdf file is the same as the logical name of the old .mdf file. They are actually different files - they just share the same logical name? I guess maybe this isn't a short-term problem, but I can see it confusing somebody down the road. Any way to change the logical name of the .mdf file? UPDATE EDIT - Apparently you can just change the logical name through the GUI by, get this, clicking on it and typing a new name. I could swear that was not possible when I posted this, but maybe it was and I somehow missed it! Either way - the solution below should still work but doing it through the GUI is also an option.

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  • SQL Error (2003): Can't connect to MySQL server on 'X.X.X.X.' (10051) - What does this error mean?

    - by BeeS
    I get following error when i try to connect via "HeidiSQL" to my database server (local network) SQL Error (2003): Can't connect to MySQL server on 'X.X.X.X.' (10051) SSH Connection via Putty works fine. I checked the my.cnf file on the server (Ubuntu), but settings like bind_address are correct. Is it possible that my wireless modem (SpeedTouch) makes this trouble? (Because my provider changed the download speed) !? Thank you very much for your help!

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  • How to achieve zero down time

    - by Hiral Lakdavala
    For an application we want to achieve zero database and application down time using Active Active configuration. Our dB is Oracle Following are my questions: How can we achieve active active configuration in Oracle? Will introducing Cassandra/HBase(or any other No SQL dbs) cloud help in zero downtime or it is only for fast retrieval of data in a large db? Any other options? Thanks and Regards, Hiral

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  • Hidden features of MySQL

    - by Binoj Antony
    In the long tradition of having hidden features, let us have a list of hidden features in MySQL. Do put one feature per answer. Also See: Hidden Features of Linux Hidden Features of PowerShell Hidden features of Oracle Database Hidden Features of Windows 2008 Hidden Features of Solaris/OpenSolaris Hidden Features of SQL Server Hidden Features of IIS (6.0 / 7.0)

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  • Access to SQL Server when administrator account deleted

    - by Shiraz Bhaiji
    An interesting situation here. We have a database server, used for testing only, where someone went in and deleted the administrator login. Since this is a test server the was no other admin level login on the server. Is there a way to get access to the server again without reinstalling SQL Server? We do not need the data in the databases, these are droped and recreated everytime the tests are run.

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  • What steps should I take to remove an employee from a linux server?

    - by user146059
    I was recently hired as the main developer of a small web company. It seems that I will be taking his place and I don't have much system admin experience. My non-technical bosses have instructed me to ensure that he will not be able to cause any damage to our system/database/application when he is gone. I know the basics of what needs to be done but was hoping to have a definitive list before it happens.

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  • What permissions do I need to run SQL*Loader?

    - by Jason Baker
    What permissions does a database user need to be able to run oracle's sql loader? For instance, since sql loader will disable indexes and triggers, does it need ALTER permissions for those items? This seems like a simple question, but I can't find any documentation on this in the manual.

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  • What is the standard system architecture for MongoDB

    - by learner
    I know this question is too vague, so I would like to add some key numbers to give insights about what the scenario is Each Document size - 360KB Total Documents - 1.5 million Document created/day - 2k read intensive - YES Availability requirement - HIGH With these requirements in mind, here is what I believe should be the architecture, but not too sure, please share your experiences and point me to right directions 2 Linux Box(Ubuntu 11 would do)(on a different rack setup for availability) 64-bit Mongo Database 1-master(for read/wr1te) and 1-slave(read-only with replication ON) Sharding not needed at this point in time Thank you in advance

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  • Tomcat - Persistent Object

    - by David
    I am running a servlet that recommends items based on a data model. The data model has to be loaded into an object from a database each time user makes a request to the sever and since the data is the same for all the users I would like this object to be loaded once only. I am very new to Tomcat and don't know where to look so any advice will be appreciated. Thanks!

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  • Error! File In use: SQLSERVER

    - by Asad Butt
    I am trying to copy a database from one folder to another. There is no program at all running except operating system.(I mean all windows shut) I keep getting this : The action cannot be completed because the file is open is another program close file and try again Try again, Try again , Try again ......... what the hell on earth is holding that file and how can I carry on with copy / delete / overwrite files(DB) as this problem is something very common. Thanks

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  • multiple VM vs multiple named instance

    - by thushya
    Hi , I am looking for some comparison or data for sql 2008 deployment , what are the advantages and disadvantages installing multiple VM vs multiple named instance ? How can i save license cost using VMs vs physical server for sql 2008 ? is there a way to find out what is maximum number of connections to database at any time or in the past - need to calculate needed CAL license ? Thanks.

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  • What is the best Linux filesystem for MySQL (InnoDB)?

    - by Continuation
    I tried to look for benchmark on the performances of various filesystems with MySQL InnoDB but couldn't find any. My database workload is the typical web-based OLTP, about 90% read, 10% write. Random IO. Among popular filesystems such as ext3, ext4, xfs, jfs, Reiserfs, Reiser4, etc. which one do you think is the best for MySQL?

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  • Connection problem to MySQL on another machine on LAN

    - by Ankur
    I'm having trouble connecting to a MySQL database on the other machine on the same network. Could not connect to the specified instance. MySQL error number 1130 Host 'abc' is not allowed to connect to this MySQL server (Pinging ok time 1-3 ms ttl =128) I've checked out the following: TCP/IP enabled RegEdit under hlocal machine .... parameters .. maxUserpORT And timedelay.. Grant all . to 'root'@'Myipaddress'

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  • PostgreSQL Backup/Restore

    - by Ian
    What's the best way to backup a postgresql database? I've tried using the documentation at www.postgresql.org, but I always get integrity errors when restoring. Right now I'm using this for backup: pg_dump -U myuser -d mydatabase db.pg.dump for restore: pg_restore -c -r -U myuser -d mydatabase db.pg.dump But I'm not getting the desired results..

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  • Designing a web application to scale

    - by Fahim Akhter
    Hi, While designing a web application facebook application to be precise. Which can spike and increase rapidly because of it vitality and is right intensive. What point should one keep in mind while designing the DB. For example what things should I leave room for if I need to shard or have a Master/Slave combination later (with memcache) Considering I use Relational Database with mySQL

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  • I'm managing SQLite, MySQL and PostgreSQL databases and want a tool for this locally

    - by littlejim84
    I develop web applications on Mac OSX in SQLite, MySQL and PostgreSQL and these are then put on the webserver. I want to be able to take the brunt out of looking at the terminal locally when dealing with these databases - is there any software available (free or otherwise) that can handle all three of these database technologies in a GUI for the Mac that is actually decent and worth it?

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  • ORA-00942: table or view does not exist & ORA-01031: insufficient privileges

    - by Forza
    I can't access any tables on my oracle database. When selecting the table product I get ORA-00942: table or view does not exist I have tried this solution but I don't have sufficiënt rights to add a new user. I get ORA-01031: insufficient privileges I am logged on as ADMIN to oracle application express. The environment we use is windows server 2003. What can I do to 1) access my tables and 2) get back the administration rights I am supposed to have?

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  • IIS/MSSQL HA on two servers? NLB + Mirroring

    - by Igor K
    Currently have the one server doing MSSQL/IIS. Can use NLB with two servers running IIS for HA and can use database mirroring and put the failover partner in the connection string for HA. Can we use NLB + Mirroring together? So if one of the servers died (ie power plug removed), everything will continue to work (after the timeout for the mirror to become the principal)?

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  • What is the best way to determine what's locking up SQL Server using a query?

    - by Aplato
    Recently our SQL Server is getting bogged down by something. I was wondering what is the best way to check what could be causing the problem by querying the database. This is the best I've found so far: SELECT SPID = s.spid , BlockingSPID = s.blocked , DatabaseName = DB_NAME(s.dbid) , ProgramName = s.program_name , [Status] = s.[status] , LoginName = s.loginame , ObjectName = OBJECT_NAME(objectid, s.dbid) , [Definition] = CAST([text] AS VARCHAR(MAX)) FROM sys.sysprocesses s CROSS APPLY sys.dm_exec_sql_text (sql_handle) WHERE s.spid > 50 ORDER BY DatabaseName , loginName

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