数据库(Database)代写包括SQL语言, relation algebra(关系代数), XML, XPath. 可以画ER图, ER图转换成SQL语句, 数据库规范化(database normalization), 1NF(第一范式), 2NF, 3NF, BCNF，4NF，5NF. 支持MySQL, PostgreSQL, Oracle IBM-DB2等多种关系数据库和NoSQL数据库MongoDB.
Setup The code for this assignment has been pushed to the same repository that you forked for the previous assignment. That means all you need to do is sync your repository with the main repository. There are multiple ways to do this, perhaps the easiest way is to login to the BitBucket website, go to […]
数据库代写: CSE 530 HW2 Read More »
CS430/630 – Final Exam Practice 40 points, 150 minutes For questions 1-3, you are given the following schema: Students (sid:integer, sname:string, age:integer) Courses (cid:integer, cname:integer, credits:integer) Grades(sid:integer, cid:integer, grade:string) The meaning of attributes is as follows: – sid: unique student identifier, primary key in table Students – cid: unique course identifier, primary key in table
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CS430/630 – Practice Midterm For both questions, you are given the following relational schema. Emp (eid:integer, ename:string, age:integer, salary:real) Works (eid:integer, did:integer, pct_time:integer) Dept(did:integer, dname:string, budget:real, managerid:integer) managerid values in table Dept correspond to eid values in table Emp. Question 1 (10 points) Write relational algebra expressions for the following queries: (a) Find the ages
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The purpose of this project is to put to work the knowledge you’ve gained regarding PostgreSQL and MongoDB by implementing a database design in both databases, solving the same problem twice! You will then load data into your databases and run queries against them to compare performance, add indexes to address performance problems you identify,
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CS 34800 – Project 3 Due Date: April 19, 2018 – 11:59 PM on Blackboard (There will be a 10% penalty for each late calendar-day. After five calendar days, the homework will not be accepted.) Project Description In this project, you will implement a simple role-based access control scheme for a slightly modified version of
JDBC oracle数据库代写: CS 34800 – Project 3 Read More »
Assignment 1 – XML Data Assessment Summary Weighting: 15% Due Date: 23PM Sun 15 Apr Group Assignment Submission Right-click on the folder DBE-A1 to zip the folder and submit the zip file to the Assignment 1 submission area on the course website. Assignment Overview This assignment enables you to apply your knowledge of XML,
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COMP SCI 4094/4194/7094 – Distributed Databases and Data Mining Assignment 1 Important Notes • Handins: DUE: 23:30 Monday, 2th April, 2018 – The deadline for submission of your assignment is 23:30 Monday, 16th Apr, 2018. – You must do this assignment individually and make individual submissions. – Your program should be coded in C++ and
数据库代写: COMP SCI 4094/4194/7094 – Distributed Databases and Data Mining Assignment 1 Read More »
Schema In this assignment, we will perform some analytics on real data from one hundred years of elections. The data comes from ParlGov1, a database for political science. It contains information on political parties, elections and cabinets for most democracies that are part of the EU (European Union) or the OECD (Organization for Economic Co-operation
Dalhousie University Faculty of Computer Science CSCI 2141 Intro to Database Systems Winter-2018 Assignment 2 [50 marks] Submission Deadline: SATURDAY, MARCH 03 PROBLEM STATEMENT: The ERD of the “Tourista” database is shown below.
CS 34800 – Project 3 Due Date: April 19, 2018 – 11:59 PM on Blackboard (There will be a 10% penalty for each late calendar-day. After five calendar days, the homework will not be accepted.) Project Description In this project, you will implement a simple role-based access control scheme for a slightly modified version of
数据库 java jdbc代写: CS 34800 – Project 3 Read More »