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  • Regarding Sqlite Datbase connectivity in iphone

    - by Prash.......
    hi.. I am developing an application in iphone in which i have to do the database connectivity using sqlite. I have made a "clsDBManage" class which contains 4 functions open_database, close_database, is_database_open, getdatabase_connection, which are globally defined ,i have a screen called "user details" in which i am filling the user details such as name , mobileno , email-id , password, i want that when user feeds the info it should get connected with database and store the details entered and should authenticate the user the next time he logs in. (Just as we have yahoo login,gmail login screen) clsDBManage.h +(int) openDBConnection; +(int) closeDBConnection; +(BOOL) IsDatabaseOpen; +(sqlite3 *)getDBConnection; clsDBManage.m import "clsDBManage.h" import "Types.h" sqlite3 *DBConnection=nil; @implementation clsDBManage +(int) openDBConnection { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *path = [documentsDirectory stringByAppendingPathComponent:@"iphone.sqlite"]; //Before if ([self IsDatabaseOpen] == YES) [self closeDBConnection]; // Open the database. The database was prepared outside the application. if (sqlite3_open([path UTF8String], &DBConnection ) == SQLITE_OK) { ifdef _DEBUG NSLog(@"Database Successfully Opened :)"); endif return CON_RET_SUCCESSFUL; } else { ifdef _DEBUG NSLog(@"Error in opening database :("); endif return CON_RET_ERROR; } } +(BOOL) IsDatabaseOpen { if(DBConnection != nil) { //add if condition to check database is in open state or close state return YES; } else { return NO; } } +(int) closeDBConnection { @try { if(DBConnection != nil) { sqlite3_close(DBConnection); DBConnection = nil; return CON_RET_SUCCESSFUL; } else { return CON_RET_ERROR; } } @catch (NSException * e) { NSLog([e reason]); } } +(sqlite3 *)getDBConnection { if ([self openDBConnection] == 1) return DBConnection; else return nil; } @end //classDBManage file is my handler class where i have written code to open database //my addprofile functions -(NSInteger)addProfile:(NSString *)mobileno:(NSString *)country:(NSString *)username:(NSString *)screenname:(NSString *)emailid:(NSString *)password:(NSString *)retypepassword { @try { sqlite3 *db =[clsDBManage getDBConnection]; if (db != nil) { sqlite3_stmt *statement =nil; const char *sql = "insert into SPCaccountdetails(MobileNo , Country , UserName , ScreenName, EmailId, Password, RetypePawssword) Values(?,?,?,?,?,?,?)"; if(sqlite3_prepare_v2(db, sql, -1, &statement, NULL) != SQLITE_OK) { //NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(db)); } sqlite3_bind_text(statement, 1, [mobileno UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 2, [country UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 3, [username UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 4, [screenname UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 5, [emailid UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 6, [password UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 7, [retypepassword UTF8String], -1, SQLITE_TRANSIENT); if(SQLITE_DONE != sqlite3_step(statement)) { NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(db)); } sqlite3_finalize(statement); } } @catch(NSException *e) { //[clsMessageBox ShowMessageOK:@CON_MESSAGE_TITLE_MESSAGE_USER_PROFILE :[e reason]]; } return CON_RET_SUCCESSFUL; } //button click event where i am calling addprofile function;_ [self addProfile:txtMobile :txtCountry :txtName :txtScreenname :txtemailid :txtpassword :txtretypepassword];

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  • Question About TransactionScope in .NET

    - by peace
    using (TransactionScope scope = new TransactionScope()) { int updatedRows1 = custPh.Update(cust.CustomerID, tempPh1, 0); int updatedRows2 = custPh.Update(cust.CustomerID, tempPh2, 1); int updatedRows3 = cust.Update(); if (updatedRows1 > 0 && updatedRows2 > 0 && updatedRows3 > 0) { scope.Complete(); } } Is the above TransactionScope code structured correctly? This is my first time using it so i'm trying to make as simple as i can.

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  • Ant database rebuild script, avoiding interactive prompting

    - by fras85
    Hi Guys. I'm writing an ant script to rebuild our database i.e. dropping everything and rebuilding from scratch. The problem our DBA adds a Y/N prompt before executing the rest of the script, and therefore we can't call this from an automated build process. Does anyone have any suggestions to circumvent the Y/N prompt? Obviously we could create seperate scripts, one for the DBA's and one for the automated build - but this requires maintaning both. We're running on Windows so it's not as easy as using sed to strip out the prompt...but i'm thinking something along those lines. Not sure if that's clear enough but hope you can help. Cheers.

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  • MySQL: Count occurrences of known (or enumerated) distinct values

    - by Eilidh
    After looking at how to count the occurrences of distinct values in a field, I am wondering how to count the occurrences of each distinct value if the distinct values are known (or enumerated). For example, if I have a simple table - TrafficLight Colour ------------ ------ 1 Red 2 Amber 3 Red 4 Red 5 Green 6 Green where one column (in this case Colour) has known (or enumerated) distinct values, how could I return the count for each colour as a separate value, rather than as an array, as in the linked example. To return an array with a count of each colour (using the same method as in the linked example), the query would be something like SELECT Colour COUNT(*) AS ColourCount FROM TrafficLights GROUP BY Colour, and return an array - Colour ColourCount ------ ----------- Red 3 Amber 1 Green 2 What I would like to do is to return the count for each Colour AS a separate total (e.g. RedCount). How can I do this?

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  • Date and time Query - problem

    - by Gold
    hi i try to run this query: select * from WorkTbl where ((Tdate = '20100414' AND Ttime = '06:00') and (Tdate <= '20100415' AND Ttime <= '06:00')) i have this date: 14/04/2010 and time: 14:00 i cant see hem, how to fix the query ? thank's in advance

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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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  • How can I perform this query between related tables without using UNION?

    - by jeremy
    Suppose I have two separate tables that I watch to query. Both of these tables has a relation with a third table. How can I query both tables with a single, non UNION based query? I want the result of the search to rank the results by comparing a field on each table. Here's a theoretical example. I have a User table. That User can have both CDs and books. I want to find all of that user's books and CDs with a single query matching a string ("awesome" in this example). A UNION based query might look like this: SELECT "book" AS model, name, ranking FROM book WHERE name LIKE 'Awesome%' UNION SELECT "cd" AS model, name, ranking FROM cd WHERE name LIKE 'Awesome%' ORDER BY ranking DESC How can I perform a query like this without the UNION? If I do a simple left join from User to Books and CDs, we end up with a total number of results equal to the number of matching cds timse the number of matching books. Is there a GROUP BY or some other way of writing the query to fix this?

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  • Error when restoring SSAS cube: MemberKeyesUnique element at line xxx cannot appear under (...)/Hier

    - by Phil
    Hi, I'm getting this error when trying to restore an SSAS database from a backup: The ddl2:MemberKeysUnique element at line 63, column 4862 (namespace http://schemas.microsoft.com/analysisservices/2003/engine/2) cannot appear under Load/ObjectDefinition/Dimension/Hierarchies/Hierarchy. Google hasn't turned up any helpful solutions. (a lot of people found that installing SP2 made the error go away but this has always previously worked in our environment) I don't really understand what the error means. Can somebody interpret or suggest a fix? Thanks, Phil

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  • Single Query returning me 4 tables, How to get all of them back into dataset ?

    - by Shantanu Gupta
    How to fill multiple tables in a dataset. I m using a query that returns me four tables. At the frontend I am trying to fill all the four resultant table into dataset. Here is my Query. Query is not complete. But it is just a refrence for my Ques Select * from tblxyz compute sum(col1) suppose this query returns more than one table, I want to fill all the tables into my dataset I am filling result like this con.open(); adp.fill(dset); con.close(); Now when i checks this dataset. It shows me that it has four tables but only first table data is being displayed into it. rest 3 dont even have schema also. What i need to do to get desired output

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  • Writing a query to find MAX number in PL/SQL

    - by user2461116
    I am suppose to Write a query that will display the largest number of movies rented by one member and that member's name. Give the output column a meaningful name such as MAXIMUM NUMBER. This is what I have. select max(maximum_movies) from (select count(*)maximum_movies from mm_member join mm_rental on mm_rental.member_id = mm_member.member_id group by first, last); I got the maximum number but the output should be like this. First Last Maximum_movies John Doe 4 But the output is Maximum_movies 4 Any suggestions?

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  • Insert Stored Procedure, Using Asp.Net WebForm to Insert new [Customer]

    - by user2953815
    Can someone please help me create a stored procedure to insert a new customer from a web form. I am having difficulty making the state a drop down list for customer to pick a state from the list and having that inserted into the database. INSERT INTO Customer ( Cust_First, Cust_Middle, Cust_Last, Cust_Phone, Cust_Alt_Phone, Cust_Email, Add_Line1, Add_Line2, Add_Bill_Line1, Add_Bill_Line2, City, State_Prov_Name, Postal_Zip_Code, Country_ID ) VALUES ( @Cust_First, @Cust_Middle, @Cust_Last, @Cust_Phone, @Cust_Alt_Phone, @Cust_Email, @Add_Line1, @Add_Line2, @Add_Bill_Line1, @Add_Bill_Line2, @City, @State_Prov_Name, @Postal_Zip_Code, @Country_ID )"> <InsertParameters> <asp:Parameter Name="Cust_First" Type="String"></asp:Parameter> <asp:Parameter Name="Cust_Middle" Type="String"></asp:Parameter> <asp:Parameter Name="Cust_Last" Type="String"></asp:Parameter> <asp:Parameter Name="Cust_Phone" Type="String"></asp:Parameter> <asp:Parameter Name="Cust_Alt_Phone" Type="String"></asp:Parameter> <asp:Parameter Name="Cust_Email" Type="String"></asp:Parameter> <asp:Parameter Name="Add_Line1" Type="String"></asp:Parameter> <asp:Parameter Name="Add_Line2" Type="String"></asp:Parameter> <asp:Parameter Name="Add_Bill_Line1" Type="String"></asp:Parameter> <asp:Parameter Name="Add_Bill_Line2" Type="String"></asp:Parameter> <asp:Parameter Name="City" Type="String"></asp:Parameter> <asp:Parameter Name="Postal_Zip_Code" Type="String"></asp:Parameter> <asp:Parameter Name="Cust_ID" Type="Int32"></asp:Parameter> <asp:Parameter Name="State_Prov_Name" Type="String"></asp:Parameter> <asp:Parameter Name="Country_Name" Type="String"></asp:Parameter> </InsertParameters>

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  • LinQ XML mapping to a generic type

    - by Manuel Navarro
    I´m trying to use an external XML file to map the output from a stored procedure into an instance of a class. The problem is that my class is of a generic type: public class MyValue<T> { public T Value { get; set; } } Searching through a lot of blogs an articles I've managed to get this: <?xml version="1.0" encoding="utf-8" ?> <Database Name="" xmlns="http://schemas.microsoft.com/linqtosql/mapping/2007"> <Table Name="MyValue" Member="MyNamespace.MyValue`1" > <Type Name="MyNamespace.MyValue`1"> <Column Name="Category" Member="Value" DbType="VarChar(100)" /> </Type> </Table> <Function Method="GetResourceCategories" Name="myprefix_GetResourceCategories" > <ElementType Name="MyNamespace.MyValue`1"/> </Function> </Database> The MyNamespace.MyValue`1 trick works fine, and the class is recognized. I expect four rows from the stored procedure, and I'm getting four MyValue<string> instances, but the big problem is that the property Value for the all four instances is null. The property is not getting mapped and I don't really get why. Maybe worth noting that the property Value is generic, and that when the mapping is done using attributes it works perfect. Anyone have a clue? BTW the method GetResourceCategories: public ISingleResult<MyValue<string>> GetResourceCategories() { IExecuteResult result = this.ExecuteMethodCall( this, (MethodInfo)MethodInfo.GetCurrentMethod()); return (ISingleResult<MyValue<string>>)result.ReturnValue; }

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  • Best performance approach to history mechanism?

    - by Royi Namir
    We are going to create History Mechanism for our changes in DB (DART in pic) via Triggers. we have 600 tables. Each record that will be changed - the trigger will insert the deleted one into XXX. regarding to the XXX : option 1 : clone each table in "Dart" DB and each table now will have a "sister table" e.g. : Table1 will have Table1_History problems : we will have 1200 tables programmer can do mistakes by working on wrong tables... option 2 : make a new DB (DART_2005 in pic) and the history tables will be there option 3 : use linked server which stores the Db which will contain the history tables. question : 1) which option gives the best performance ( I guess 3 is not - but is it 1 or 2 or same ?) 2) Does option 2 is acting like "linked server" ( in queries we will need to select from both DB's...) 3) What is the best practice approach ?

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  • Observing social web behavior: to log or populate databases?

    - by jlafay
    When considering social web app architecture, is it a better approach to document user social patterns in a database or in logs? I thought for sure that behavior, actions, events would be strictly database stored but I noticed that some of the larger social sites out there also track a lot by logging what happens. Is it good practice to store prominent data about users in a database and since thousands of user actions can be spawned easily, should they be simply logged?

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  • How Can i Create This Complicated Query ?

    - by mTuran
    Hi, I have 3 tables: projects, skills and project_skills. In projects table i hold project's general data. Second table skills i hold skill id and skill name also i have projects_skills table which is hold project's skill relationships. Here is scheme of tables: CREATE TABLE IF NOT EXISTS `project_skills` ( `project_id` int(11) NOT NULL, `skill_id` int(11) NOT NULL, KEY `project_id` (`project_id`), KEY `skill_id` (`skill_id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_turkish_ci; CREATE TABLE IF NOT EXISTS `projects` ( `id` int(11) NOT NULL AUTO_INCREMENT, `employer_id` int(11) NOT NULL, `project_title` varchar(100) COLLATE utf8_turkish_ci NOT NULL, `project_description` text COLLATE utf8_turkish_ci NOT NULL, `project_budget` int(11) NOT NULL, `project_allowedtime` int(11) NOT NULL, `project_deadline` datetime NOT NULL, `total_bids` int(11) NOT NULL, `average_bid` int(11) NOT NULL, `created` datetime NOT NULL, `active` tinyint(1) NOT NULL, PRIMARY KEY (`id`), KEY `created` (`created`), KEY `employer_id` (`employer_id`), KEY `active` (`active`), FULLTEXT KEY `project_title` (`project_title`,`project_description`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_turkish_ci AUTO_INCREMENT=3 ; CREATE TABLE IF NOT EXISTS `skills` ( `id` int(11) NOT NULL AUTO_INCREMENT, `category` int(11) NOT NULL, `name` varchar(100) COLLATE utf8_turkish_ci NOT NULL, `seo_name` varchar(100) COLLATE utf8_turkish_ci NOT NULL, `total_projects` int(11) NOT NULL, PRIMARY KEY (`id`), KEY `seo_name` (`seo_name`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_turkish_ci AUTO_INCREMENT=224 ; I want to select projects with related skill names. I think i have to use JOIN but i don't know how can i do. Thanks

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  • GridView will not update underlying data source

    - by John Christensen
    So I'm been pounding on this problem all day. I've got a LinqDataSource that points to my model and a GridView that consumes it. When I attempt to do an update on the GridView, it does not update the underlying data source. I thought it might have to do with the LinqDataSource, so I added a SqlDataSource and the same thing happens. The aspx is as follows (the code-behind page is empty): <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="Data Source=devsql32;Initial Catalog=Steam;Persist Security Info=True;" ProviderName="System.Data.SqlClient" SelectCommand="SELECT [LangID], [Code], [Name] FROM [Languages]" UpdateCommand="UPDATE [Languages] SET [Code]=@Code WHERE [LangID]=@LangId"> </asp:SqlDataSource> <asp:GridView ID="_languageGridView" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="LangId" DataSourceID="SqlDataSource1"> <Columns> <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" /> <asp:BoundField DataField="LangId" HeaderText="Id" ReadOnly="True" /> <asp:BoundField DataField="Code" HeaderText="Code" /> <asp:BoundField DataField="Name" HeaderText="Name" /> </Columns> </asp:GridView> <asp:LinqDataSource ID="_languageDataSource" ContextTypeName="GeneseeSurvey.SteamDatabaseDataContext" runat="server" TableName="Languages" EnableInsert="True" EnableUpdate="true" EnableDelete="true"> </asp:LinqDataSource> What in the world am I missing here? This problem is driving me insane.

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  • Should I use integer primary IDs?

    - by arthurprs
    For example, I always generate an auto-increment field for the users table, but I also specify a UNIQUE index on their usernames. There are situations that I first need to get the userId for a given username and then execute the desired query, or use a JOIN in the desired query. It's 2 trips to the database or a JOIN vs. a varchar index. Should I use integer primary IDs? Is there a real performance benefit on INT over small VARCHAR indexes?

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  • How do I replace NOT EXISTS with JOIN?

    - by YelizavetaYR
    I've got the following query: select distinct a.id, a.name from Employee a join Dependencies b on a.id = b.eid where not exists ( select * from Dependencies d where b.id = d.id and d.name = 'Apple' ) and exists ( select * from Dependencies c where b.id = c.id and c.name = 'Orange' ); I have two tables, relatively simple. The first Employee has an id column and a name column The second table Dependencies has 3 column, an id, an eid (employee id to link) and names (apple, orange etc). the data looks like this Employee table looks like this id | name ----------- 1 | Pat 2 | Tom 3 | Rob 4 | Sam Dependencies id | eid | Name -------------------- 1 | 1 | Orange 2 | 1 | Apple 3 | 2 | Strawberry 4 | 2 | Apple 5 | 3 | Orange 6 | 3 | Banana As you can see Pat has both Orange and Apple and he needs to be excluded and it has to be via joins and i can't seem to get it to work. Ultimately the data should only return Rob

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  • Removing "Using temporary; Using filesort" from this MySQL select+join+group by query

    - by claytontstanley
    I have the following query: select t.Chunk as LeftChunk, t.ChunkHash as LeftChunkHash, q.Chunk as RightChunk, q.ChunkHash as RightChunkHash, count(t.ChunkHash) as ChunkCount from chunksubset as t join chunksubset as q on t.ID = q.ID group by LeftChunkHash, RightChunkHash And the following explain table: id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE subsets ref PRIMARY,IDIndex,SubsetIndex SubsetIndex 767 const 522014 "Using where; Using temporary; Using filesort" 1 SIMPLE subsets eq_ref PRIMARY,IDIndex,SubsetIndex PRIMARY 771 sotero.subsets.Id,const 1 "Using where; Using index" 1 SIMPLE c ref IDIndex IDIndex 4 sotero.subsets.Id 12 "Using where" 1 SIMPLE c ref IDIndex IDIndex 4 sotero.subsets.Id 12 note the "using temporary; using filesort". When this query is run, I quickly run out of RAM (presumably b/c of the temp table), and then the HDD kicks in, and the query slows to a halt. I thought it might be an index issue, so I started adding a few that sort of made sense: Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment chunks 0 PRIMARY 1 ChunkId A 17796190 NULL NULL BTREE chunks 1 ChunkHashIndex 1 ChunkHash A 243783 NULL NULL BTREE chunks 1 IDIndex 1 Id A 1483015 NULL NULL BTREE chunks 1 ChunkIndex 1 Chunk A 243783 NULL NULL BTREE chunks 1 ChunkTypeIndex 1 ChunkType A 2 NULL NULL BTREE chunks 1 chunkHashByChunkIDIndex 1 ChunkHash A 243783 NULL NULL BTREE chunks 1 chunkHashByChunkIDIndex 2 ChunkId A 17796190 NULL NULL BTREE chunks 1 chunkHashByChunkTypeIndex 1 ChunkHash A 243783 NULL NULL BTREE chunks 1 chunkHashByChunkTypeIndex 2 ChunkType A 261708 NULL NULL BTREE chunks 1 chunkHashByIDIndex 1 ChunkHash A 243783 NULL NULL BTREE chunks 1 chunkHashByIDIndex 2 Id A 17796190 NULL NULL BTREE But still using the temporary table. The db engine is MyISAM. How can I get rid of the using temporary; using filesort in this query? Just changing to InnoDB w/o explaining the underlying cause is not a particularly satisfying answer. Besides, if the solution is to just add the proper index, then that's much easier than migrating to another db engine.

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  • Ordering Wordpress posts by most recently commented on

    - by Hardseat
    What's the query to list wordpress posts by most recent, with posts most recently commented on going to the top of the order? (Standard "message board" style) This post looked promising: http://stackoverflow.com/questions/698438/ordering-wordpress-posts-by-most-recent-comment But the query is clearly wrong. Can anyone help?

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