Short intro to FMDB, an Objective-C API or SQLite.

4. - ( NSMutableArray *) getStates{ NSMutableArray *states = [[ NSMutableArray alloc ] init ]; NSString *query = @"SELECT id, name, latitude, longitude FROM states" ; sqlite3_stmt *statement; int result = ( sqlite3_prepare_v2 ( database , [query UTF8String ], - 1 , &statement, nil )); if (result == SQLITE_OK ) { while ( sqlite3_step (statement) == SQLITE_ROW ) { State *state = [[ State alloc ] initWithId : sqlite3_column_int (statement, 0 ) withName :[ self checkForNull :( char *) sqlite3_column_text (statement, 1 )] withLatitude :[ self checkForNull :( char *) sqlite3_column_text (statement, 2 )] withLongitude :[ self checkForNull :( char *) sqlite3_column_text (statement, 3 )]]; [states addObject :state]; [state release ]; } sqlite3_finalize (statement); } return states; }

5. - ( NSMutableArray *) getStates { NSMutableArray *states = [[ NSMutableArray alloc ] init ]; NSString *query = @"SELECT id, name, latitude, longitude FROM states" ; FMResultSet *rs = [db executeQuery :query]; while ([rs next ]) { State *state = [[ State alloc ] initWithId :[rs intForColumnIndex : 0 ] withName :[rs stringForColumnIndex : 1 ] withLatitude :[rs stringForColumnIndex : 2 ] withLongitude :[rs stringForColumnIndex : 3 ]]; [states addObject :state]; [state release ]; } [rs close ]; return states; }

7. Do This [db executeUpdate : @"insert into test (a, b, c, d, e) values (?, ?, ?, ?, ?)" , @"hi'" , // look! I put in a ', and I'm not escaping it! @"number 10" , [ NSNumber numberWithInt :i], [ NSDate date ], [ NSNumber numberWithFloat : 2.2f ]];

8. Not This char *errorMsg; char *update = "INSERT INTO favorites (object_id) VALUES (?);" ; sqlite3_stmt *stmt; if ( sqlite3_prepare_v2 ( database , update, - 1 , &stmt, nil ) == SQLITE_OK ) { sqlite3_bind_int (stmt, 1 , objectID); } if ( sqlite3_step (stmt) != SQLITE_DONE ) { NSAssert1 ( 0 , @"Error updating table: %s" , &errorMsg); } sqlite3_finalize (stmt);

13. Selecting Records FMResultSet *rs = [db executeQuery : @"select * from test where a = ?" , @"hi’" ]; while ([rs next ]) { NSLog ( @"%d %@ %@ %f" , [rs intForColumn : @"c" ], [rs stringForColumn : @"b" ], [rs dateForColumn : @"d" ], [rs doubleForColumn : @"e" ]); } [rs close ]; Note - the parameters passed into executeQuery are quote-safe (escaped)

14. Inserting Records int i = 0 ; while (i++ < 20 ) { [db executeUpdate : @&quot;insert into test (a, b, c, d, e) values (?, ?, ?, ?, ?)&quot; , @&quot;hi&quot; , [ NSString stringWithFormat : @&quot;number %d&quot; , i], [ NSNumber numberWithInt :i], [ NSDate date ], [ NSNumber numberWithFloat : 2.2f ]]; }

17. DEMO