database

COMP3311 20T3 The University of New South Wales Database Systems COMP3311 Database Systems 20T3 [Instructions] [Notes] [Database] [Course Website] [Cheat Sheets] [Q1] [Q2] [Q3] [Q4] [Q5] [Q6] [Q7] [Q8] [Q9] [Q10] [Q11] [Q12] Question 2 (6 marks) Write an SQL view that gives the names of all players who have scored more than one goal […]

COMP3311 20T3 SQLite Database Systems Summary information about what SQLite v3 provides. In the examples below, x, y, s, etc. are attributes. Data Types Base Data Types integer, real, char(N), varchar(N), text, date, time, datetime Domains create domain Name as BaseType check Constraint; Tuple Types create type Name as (Attr1 Type1, …, Attrn Typen); Expressions

COMP3311 20T3 The University of New South Wales Database Systems COMP3311 Database Systems 20T3 [Instructions] [Notes] [Database] [Course Website] [Cheat Sheets] [Q1] [Q2] [Q3] [Q4] [Q5] [Q6] [Q7] [Q8] [Q9] [Q10] [Q11] [Q12] Football/soccer/whatever is touted as the World Game†, and there are a plethora of sites dedicated particularly to international competition. Consider the following

COMP3311 20T3 The University of New South Wales Database Systems COMP3311 Database Systems 20T3 [Instructions] [Notes] [Database] [Course Website] [Cheat Sheets] [Q1] [Q2] [Q3] [Q4] [Q5] [Q6] [Q7] [Q8] [Q9] [Q10] [Q11] [Q12] Question 12 (6 marks) Consider the following simplified schema for a database representing employees and departments in a medium-sized business: create table

COMP3311 20T3 The University of New South Wales Database Systems COMP3311 Database Systems 20T3 [Instructions] [Notes] [Database] [Course Website] [Cheat Sheets] [Q1] [Q2] [Q3] [Q4] [Q5] [Q6] [Q7] [Q8] [Q9] [Q10] [Q11] [Q12] Question 1 (5 marks) Write an SQL view that gives the country name of each team and the number of matches it

COMP3311 20T3 Psycopg2 Database Systems Summary information about the Python/PostgreSQL interface. # a brief example, assuming table R(a,b,c) import psycopg2 try: conn = psycopg2.connect(“dbname=MyDB”) except: print(“Can’t open database”) exit() cur = conn.cursor() query = “select * from R where a < %s"; cur.execute(query, [5]) # runs: select * from R where < 5 for tup

COMP3311 20T3 The University of New South Wales Database Systems COMP3311 Database Systems 20T3 [Instructions] [Notes] [Database] [Course Website] [Cheat Sheets] [Q1] [Q2] [Q3] [Q4] [Q5] [Q6] [Q7] [Q8] [Q9] [Q10] [Q11] [Q12] Question 10 (7 marks) Consider the following partial Python script that uses the same soccer database as for the Prac Part of

COMP3311 20T3 The University of New South Wales Database Systems COMP3311 Database Systems 20T3 [Instructions] [Notes] [Database] [Course Website] [Cheat Sheets] [Q1] [Q2] [Q3] [Q4] [Q5] [Q6] [Q7] [Q8] [Q9] [Q10] [Q11] [Q12] Question 9 (8 marks) Note: This question is asking you to write some PLpgSQL functions. While you have a PostgreSQL server and