Question

I am trying to take the data from one table and move it over to another table. First I select all the records from the Items table in the db_data database. Then for every record that is in that table it should insert it into the Items table in the db_information database. I am only getting one record written into my Items table in the db_information database. I have 8 records in the Items table in the db_data database. So why is it not inserting all my records?

strSQL = @"SELECT GID FROM Items";
chrStmt = [strSQL UTF8String];
if(sqlite3_prepare_v2(db_data, chrStmt, -1, &cmpStmt, NULL) == SQLITE_OK){
    while(sqlite3_step(cmpStmt) == SQLITE_ROW){
        char *val = (char *)sqlite3_column_text(cmpStmt, 0);
        NSString *strVal = [NSString stringWithUTF8String:val];
        strSQL = [NSString stringWithFormat:@"INSERT INTO Items (GID) VALUES ('%@')", strVal];
        chrStmt = [strSQL UTF8String];
        if(sqlite3_prepare_v2(db_information, chrStmt, -1, &cmpStmt, NULL) == SQLITE_OK){
            sqlite3_step(cmpStmt);
        }
    }
}

Answer 1

I think that maybe you are falsely reusing your variables strSQL, chrStmt and especially cmpStmt. This is both used in the while loop condition and main body.

Try using separate variables for the other database.