macOS sqlite updation query

[moon25]

if (![txt_odays.text isEqualToString""] && ![txt_pdays.text isEqualToString: @""] && ![txt_hmdcycle.text isEqualToString""] && ![txt_hmdpstart.text isEqualToString""] && ![txt_hmdplast.text isEqualToString""] && ![txt_pstartdate.text isEqualToString""])
{

NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
NSString *str_username=[defaults stringForKey"keyforusername"];

{
const char* updateSql;

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent"DatingDB.sql"];

//NSUInteger fromRow = [fromIndexPath row]+1;
//NSUInteger toRow = [toIndexPath row]+1;

//1000 is used as temporary SoundbrdID
if(sqlite3_open([writableDBPath UTF8String],&db)==SQLITE_OK)
{
updateSql=[[NSString stringWithFormat"UPDATE Userdates SET P_Start_Date='%@',HMD_cycle='%@',HMD_Plast='%@',HMD_Pstart='%@',P_days='%@',O_days='%@' WHERE UserName='%@'",txt_pstartdate.text,txt_hmdcycle.text,txt_hmdplast.text,txt_hmdpstart.text,txt_pdays.text,txt_odays.text,str_username]cStringUsingEncoding:NSUTF8StringEncoding];
retVal=sqlite3_exec(db,updateSql,NULL,NULL,&str1);

}

else
{
UIAlertView *alert =[[UIAlertView alloc] initWithTitle"alert" message"Not entered complete data"delegate:self cancelButtonTitle"Ok" otherButtonTitles:nil];
[alert show];
[alert release];
}
sqlite3_close(db);


}


}



This is my code it is not updating my row plz help me??
thanks in advance..plz provide correction in the same code..