Question: Consider the following schema for a simple social network. It maintains a collection of users, identified by unique handles (short names) User Chandle name, home

 Consider the following schema for a simple social network. It maintains

Consider the following schema for a simple social network. It maintains a collection of users, identified by unique "handles (short names) User Chandle name, home city, bio) Friend (handlei, handle2) Message Chandle text, from city) For the relational algebra expression below, indicate which question it represents. T handie OT handie, fromaty Message) - T handle home_gty User Select one: O. Find the names of users who either live in Kansas City or have written a message from Kansas City @b Find the handles of users who wrote messages while in cities other than the one in which they live. None of them d. Find the names of users who both live in Kansas City and have written a message from Kansas City O e. Find the handles of users who are friends with someone who is friends with them

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!