How to read one column from SQLite and store in Array - ios

Question

I have SQLite database with 5 columns named: Name, ID, ChildID, ParentID, BrotherID.
In this database I have many records and I want to store one of all columns value in array and return this array. For example I want to get all value in ParentID column. I use this query code:
Select ParentID from Table1 (Table1 is name of table)
This is my code for get array from certain column :
/*==================================================================
METHOD FOR GETTING MIDIFIED FROM DATABASE
==================================================================*/
- (NSMutableArray*)readingModified
{
ModiArray = [[NSMutableArray alloc] init];
// Setup the database object
sqlite3 *database2;
// Open the database from the users filessytem
if(sqlite3_open([[self DatabaseSqlite] UTF8String], &database2) == SQLITE_OK)
{
// Setup the SQL Statement and compile it for faster access
//SQLIte Statement
NSString *sqlStatement_userInfo =[NSString stringWithFormat:#"Select ParentID from Table1"];
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(database2, [sqlStatement_userInfo UTF8String], -1, &compiledStatement, NULL) == SQLITE_OK)
{
// Loop through the results and add them to the feeds array
while(sqlite3_step(compiledStatement) == SQLITE_ROW)
{
// Init the Data Dictionary
NSMutableDictionary *_dataDictionary2=[[NSMutableDictionary alloc] init];
NSString *_recordParentID = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)];
[_dataDictionary2 setObject:[NSString stringWithFormat:#"%#",_recordModified] forKey:#"ParentID"];
[array addObject:_dataDictionary2];
}
}
else
{
NSLog(#"No Data Found");
}
// Release the compiled statement from memory
sqlite3_finalize(compiledStatement);
}
sqlite3_close(database2);
return ModiArray;
}
please tell me my mistake.

Answer 1

my friend a few be careful.
this code is right but in line you mistake :
[array addObject:_dataDictionary2];
instead array put ModiArray
/*==================================================================
METHOD FOR GETTING MIDIFIED FROM DATABASE
==================================================================*/
- (NSMutableArray*)readingModified
{
ModiArray = [[NSMutableArray alloc] init];
// Setup the database object
sqlite3 *database2;
// Open the database from the users filessytem
if(sqlite3_open([[self DatabaseSqlite] UTF8String], &database2) == SQLITE_OK)
{
// Setup the SQL Statement and compile it for faster access
//SQLIte Statement
NSString *sqlStatement_userInfo =[NSString stringWithFormat:#"Select ParentID from Table1"];
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(database2, [sqlStatement_userInfo UTF8String], -1, &compiledStatement, NULL) == SQLITE_OK)
{
// Loop through the results and add them to the feeds array
while(sqlite3_step(compiledStatement) == SQLITE_ROW)
{
// Init the Data Dictionary
NSMutableDictionary *_dataDictionary2=[[NSMutableDictionary alloc] init];
NSString *_recordParentID = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)];
[_dataDictionary2 setObject:[NSString stringWithFormat:#"%#",_recordModified] forKey:#"ParentID"];
[ModiArray addObject:_dataDictionary2];
}
}
else
{
NSLog(#"No Data Found");
}
// Release the compiled statement from memory
sqlite3_finalize(compiledStatement);
}
sqlite3_close(database2);
return ModiArray;
}

Answer 2

You are adding object to array and allocating and returning ModiArray.