How to insert data into a SQLite database in iPhone

Question

I am new to iPhone development. I want to insert certain data into my database and retrieve it and display it in a table. I have created Database data.sqlite wi

Answer 1

To insert a user with certain values, you need to create an SQL insert statement like. Lets say the User object has a first name and last name then it would look like:

NSString *insertStatement = [NSString stringWithFormat:@"INSERT INTO USER (FIRSTNAME, LASTNAME) VALUES (\"%@\", \"%@\")", user.firstName, user.lastName];

char *error;
if ( sqlite3_exec(databaseHandle, [insertStatement UTF8String], NULL, NULL, &error) == SQLITE_OK)

You can check a full example at: http://www.apptite.be/tutorial_ios_sqlite.php

Answer 2

You basically have two recommended options (and using the C class is not one of them). FMDB is used by many any developers as a wrapper to Sqlite. http://code.google.com/p/flycode/source/browse/trunk/fmdb FMDB is lightweight and pretty easy to use.

Here is an example call:

NSString *path = [documentsDirectory stringByAppendingPathComponent:@"mysqlite.db"];    
appSettings.dao = [FMDatabase databaseWithPath:path];
FMResultSet *rs = [[appSettings dao] executeUpdate:@"SELECT * FROM mytable"];
while ([rs next]){
  // do stuff ...
}

This assumes am ApplicationSettings instance inside your AppDelegate .m file.

ApplicationSettings *appSettings = [ApplicationSettings sharedApplicationSettings];

Inserts are easy too:

sql = [NSString stringWithFormat:@"INSERT INTO table (intCol1, strCol2) VALUES ('%d','%@')", myObj.theNumber, myObj.theString];
[appSettings.dao executeUpdate:sql];

The other option is to use Core Data (available as of SDK 3.0). Core Data is meant to be quite fast and optimized, although it does limit you from doing non-standard stuff. Although it can lead to slower SQL queries unless you give due consideration to how you use it.

There's a tutorial on the iPhone Dev Center here

Answer 3

please check:

dbName = @"db.sqlite";
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [documentPaths objectAtIndex:0];
dbPath = [documentsDir stringByAppendingPathComponent:dbName];
BOOL success;
NSFileManager *fileManager = [NSFileManager defaultManager];
success = [fileManager fileExistsAtPath:dbPath];
if(success) return;
NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:dbName];
[fileManager copyItemAtPath:databasePathFromApp toPath:dbPath error:nil];

and

 sqlite3 *database ;
[app checkAndCreateDatabase];
// Open the database from the users filessytem
if(sqlite3_open([app.dbPath UTF8String], &database) == SQLITE_OK)
{
    sqlite3_stmt *compiledStatement1;
    NSString* query;

   query=[NSString stringWithFormat:@ " insert into test ( name  ,  company ,  phone ,  email ,  address ,  country ,  state ,  city,  zip , online_id , in_time , flag_delete, flag_update,type_id) values (?, ?, ?,?,?, ?, ?, ?, ?,?,?,? ,?,?)"];



    const char *compiledStatement = [query UTF8String];
    if(sqlite3_prepare_v2(database, compiledStatement, -1, &compiledStatement1, NULL) == SQLITE_OK)
    {
        sqlite3_bind_text(compiledStatement1, 1, [text  UTF8String], -1, SQLITE_TRANSIENT);
        sqlite3_bind_text(compiledStatement1, 2, [text UTF8String], -1, SQLITE_TRANSIENT);
        sqlite3_bind_text(compiledStatement1, 3, [text UTF8String], -1, SQLITE_TRANSIENT);
}
    // Loop through the results and add them to the feeds array
       if(SQLITE_DONE != sqlite3_step(compiledStatement1))
        NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database));
    sqlite3_finalize(compiledStatement1);
    sqlite3_close(database);
   }

Answer 4

If you're really interested in learning how to use SQLite to manage data in an iPhone app, I would recommend you to complete the following tutorial, as it's a very good introduction:

iphone-programming-tutorial-creating-a-todo-list-using-sqlite-part-1

The tutorial handles Selecting, Updating, Inserting and Deleting data in an iPhone app, using SQLite.