1 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 […]
1. Write a SQL query that writes todays date and time in the following format编写一个SQL查询，用以下格式写今天的日期和时间 2. Write the syntactically correct code to initialize at least three variables of different data types. One of the data types should be a date. Initialize all the variables to appropriate values编写语法正确的代码来初始化至少三个不同数据类型的变量。 其中一种数据类型应该是日期。 将所有变量初始化为适当的值 3. Name the elements of the
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SQL: Queries, Constraints, Triggers Structured Query Language CS430/630 Lecture 4 Slides based on “Database Management Systems” 3rd ed, Ramakrishnan and Gehrke Relational Query Language: SQL Supports simple, yet powerful querying of data. Precise semantics for relational queries. DML (Data Manipulation Language) DDL (Data Definition Language) SQL developed by IBM (system
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Assignment 1 BANA 273 Business Intelligence for Analytical Decisions This assignment must be completed individually. Submit Word file to online drop box. Write your name in the Word file. 1. Given the following four tables: Customer (CustID, CustName, AnnualRevenue, CustType) Shipment (ShipmentNumber, CustID, Weight, TruckID, DestinationCity, ShipDate) Truck (TruckID, DriverName) City(CityName, Population) The primary key
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Data Warehousing and Decision Support Views CS430/630 Lecture 11 Slides based on “Database Management Systems” 3rd ed, Ramakrishnan and Gehrke Views So far, we have looked at SQL tables Relations that are persistent Physically stored in the DBMS It is also possible to have virtual relations, or views Defined by
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1 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
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INFO20003 Database Systems INFO20003 Database Systems 1 INFO20003 Database Systems Lecture 05 Modelling with MySQL Workbench Semester 2 2018, Week 3 Dr Renata Borovica-Gajic INFO20003 Database Systems 2 Coverage • Modelling with MySQL Workbench • Recap & further design – Conceptual Design – Logical Design – Physical Design © University of Melbourne 2018 INFO20003 Database
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University of Sussex Autumn 2017 Informatics Databases Assignment 2 (Deadline 7.12.17, 4pm) This coursework must be submitted electronically via E-submission. You have to answer all 15 questions. Your answers must be uploaded in one file using the template file published on the StudyDirect page. This template contains essential comments to steer the automatic testing rig.
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INFO20003 Database Systems INFO20003 Database Systems 1© University of Melbourne 2018 INFO20003 Database Systems Lecture 07 Relational Algebra Semester 2 2018, Week 4 Dr Renata Borovica-Gajic INFO20003 Database Systems 2© University of Melbourne 2018 What we have done so far Modelling (ER) create_tables.sql Database How do we manipulate with this data? SQL: • Language for
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