Insert records in sqlite database - ios

Question

I have a sqlite db and i want to insert row in it . I used this code .
-(void)InsertRecords{
NSString *insertSQL = [NSString stringWithFormat:
#"INSERT INTO notes (id, title, content,dataAdd,category) VALUES (\"%#\", \"%#\", \"%#\" ,\"%#\",\"%#\")",
#"1",
#"mountain",
#"Prahova",
#"12.09.2019",
#"public"];
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_stmt *updateStmt = nil;
sqlite3_prepare_v2(contactDB, insert_stmt, -1, &statement, NULL);
if(sqlite3_prepare_v2(contactDB, insert_stmt, -1, &statement, NULL) == SQLITE_OK){
if (sqlite3_step(statement) == SQLITE_DONE)
{
NSLog(#"data inserted");
}
else{
NSLog(#"Error while creating update statement. '%s'", sqlite3_errmsg(contactDB));
}
}
else{
NSLog(#"Error while creating update statement. '%s'", sqlite3_errmsg(contactDB));
}
sqlite3_finalize(statement);
sqlite3_close(contactDB);
}
and it's log : data inserted .
When i do this :
querySQL1 = #"select id from notes where category LIKE 'public'";
const char *query_stmt = [querySQL1 UTF8String];
sqlite3_prepare_v2(contactDB, query_stmt, -1, &statement, NULL);
NSString *idNr;
while (sqlite3_step(statement) == SQLITE_ROW)
{
idNr =[[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 0)];
}
NSLog(#"%#",idNr);
idNr is null .
ANy ideea what is happening ? Any help will be appreciate . Thanks.

Answer 1

The NSString allocation was wrong statement, There were no need to alloc NSString object.
I changed :
NSString *idNr=#"";
while (sqlite3_step(statement) == SQLITE_ROW)
{
idNr =[NSString stringWithUTF8String:
(const char *) sqlite3_column_text(statement, 0)];
}

Answer 2

Try to use this snippet:
sqlite3 *database;
if (sqlite3_open(<#DBPath#>, &database)
!= SQLITE_OK) {
sqlite3_close(database);
NSAssert(0, #"Failed to open database");
return nil;
}
char *update = "INSERT OR REPLACE INTO <#Table name#> (<#key1#>,<#key2#>) VALUES (?,?);";
sqlite3_stmt *stmt;
if (sqlite3_prepare_v2(database, update, -1, &stmt, nil)
== SQLITE_OK) {
sqlite3_bind_text(stmt, <#the index#>,<#The text value#> , -1, NULL);
sqlite3_bind_int(stmt, <#the index#>, <#the int value#>);
}
if (sqlite3_step(stmt) != SQLITE_DONE){
NSLog(#"Error inserting version in table <#tablename#>");
return;
}
sqlite3_finalize(stmt);
sqlite3_close(database);
It uses the sqlite3_bind* functions to bind the values to the keys.