how to edit sqlite DB - ios

Question

I create one application that store data from NSDictionary in SQLite. this NSDictionary get own information from many NSArray and store in SQLite DB. this is my code:
- (void)viewDidLoad
{
[super viewDidLoad];
int number = [self GetNumberOfRecord]; //this method get number of rows in sqlite
NSArray *idd = #[#"122", #"234", #"453", #"53464", #"4565", #"1111", #"2222"];
NSArray *name = #[#"janatan", #"fred", #"john", #"cristiano", #"vein", #"emma", #"shyla"];
NSArray *age = #[#"23", #"35", #"12", #"24", #"22", #"34", #"56"];
NSArray *sex = #[#"male", #"male", #"male", #"male", #"male", #"famale", #"famale"];
NSString *query2 = [NSString stringWithFormat:#"select * from table1 where name = '%#'", [name lastObject]];
//NSLog(#"query : %#", query2);
BOOL recordExist = [self recordExistOrNot:query2];
if (!recordExist) {
for (int i = number; i < [idd count]; i++)
{
NSString *a = [idd objectAtIndex:i];
NSString *b = [name objectAtIndex:i];
NSString *c = [age objectAtIndex:i];
NSString *d = [sex objectAtIndex:i];
NSString *query = [NSString stringWithFormat:#"insert into table1 (id, name, age, sex) values ('%#', '%#', '%#', '%#')", a, b, c, d];
NSLog(#"%#", query);
[self executeQuery:query];
}
}
}
I want two things but I not found any thing about it.
First: If in above code one or two of names changed (for example NSArray *name was:
{#"janatan", #"louis", #"john", #"fredrick", #"vein", #"emma", #"shyla"}
how I can edit my table SQLite DB and replace louis & fredrick instead fred & cristiano?)
Second: If in above code one or two names removed (for example NSArray *name was:
{#"janatan", #"john", #"vein", #"emma", #"shyla"}
how I can remove Record the name of the deleted?)
thanks a lot.

Answer 1

for that you can use UPDATE Query.
try like this run for loop with unique identification value and update the values.
UPDATE table1 SET ContactName='newName' WHERE id=uniqu_id
Use this one.
NSString *query = [NSString stringWithFormat:#"UPDATE table1 SET name='%#' WHERE id='%#' ,[dic objectForKey:#"name"],[dic objectForKey:#"id"]];
EDIT:
NSString *query = [NSString stringWithFormat:#"UPDATE table1 SET name='%#',age='%#' WHERE id='%#' ,[dic objectForKey:#"name"],[dic objectForKey:#"age"],[dic objectForKey:#"id"]];