QUESTION 2 How many records are in the following table? EMPLOYEE EMPFNAME Robert EMPID EMPLNAME EMPINIT EMPJOBCODE 123455 Friedman A. 12 123456 123457 123458 Olanski Fontein Cruazona D. Delbert 18 Juliette G. X. 15 Maria 18

QUESTION 2 How many records are in the following table? EMPLOYEE EMPFNAME Robert EMPID EMPLNAME EMPINIT EMPJOBCODE 123455 Friedman A. 12 123456 123457 123458 Olanski Fontein Cruazona D. Delbert 18 Juliette G. X. 15 Maria 18

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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There are three tables in this database (see image). Write MYSQL code for: (1) Create a trigger “insert_inventory” on table “Inventory”. The trigger is fired after a row is inserted in table “Inventory”. After a row is inserted in table “inventory”, the “itemid”, the insertion time, and the action is inserted in table “Inventory_history”. The action is set to ‘add an item’. The oldprice is set to null. Test your trigger by inserting a row into Inventory and displaying the contents of Inventory_history. (2) Create a trigger “change_quantity” on table “Transaction”. The trigger is fired after a row is inserted in table “Transaction”. After a row is inserted in table “Transaction”, update the “quantity” in table “Inventory”. For example, if 3 iWatch are sold, then the quantity of iWatch in table “Inventory” is decreased by 3. Test your trigger by inserting a row into Transaction and displaying the contents of the relevant row in Inventory. (3) Create a trigger “change_price” on table…
True/False 5. In an AND criterion, the overall criterion is true if either of the individual criteria is true. 6. The concept of grouping means that statistics will be calculated for individual records. 7. In many cases, you will need to create queries to select data from more than one table. To do so, it is necessary to join the tables based on matching fields in corresponding columns. 8. Matrix algebra is a theoretical way of manipulating a database. 9. The union of tables A and B is a table containing all rows that are in either table A or table B or in both table A and table B. 10. The intersection of two tables A and B is the set of all rows that are in table A but that are not in table B.
Open your text editor and create a new document named model.php model.php will contain functions that will connect to a database potentially return PDO statementobjects to the controller for processing. updateMessagesfunction updateMessages($id)This method will take a single parameter of id which is the saved id from the last or latest message displayed. It will conditionally select from the table “messages”, id, name, message, and time. The condition is that the field id is greater than the parameter for id. The return is the PDOStatement object with the row data from the query.
Create new class DbConn containing a connection string and a single function to insert,update and delete records. It takes query as input and return boolean.• Error correction in search and update records.• Create another function in DbConn to search records that returns the ResultSet.
In this database we have users that can be two types students or instructors. They have groups and memberships. Any user can post and the post type can be video, photo or text. Here is the table structure: CREATE TABLE USER_ ( USER_ID INT NOT NULL AUTO_INCREMENT, CREATE_DATE DATE NOT NULL, PROF_DESC VARCHAR (100), PROF_PIC VARCHAR(40), LOCATION VARCHAR (40) NOT NULL, PRIMARY KEY (USER_ID) ); CREATE TABLE USER_INFO( USER_ID INT NOT NULL, SU_EMAIL CHAR(18), USER_FNAME VARCHAR(15), USER_LNAME VARCHAR (15), USER_DOB DATE, USER_GENDER CHAR(1), PRIMARY KEY (USER_ID), FOREIGN KEY (USER_ID) REFERENCES USER_(USER_ID) ON UPDATE CASCADE ); CREATE TABLE STUDENT ( SU_ID INT NOT NULL, USER_ID INT NOT NULL, YEAR_ VARCHAR (10), MAJOR VARCHAR (20), LOCATION VARCHAR (40) NOT NULL, PRIMARY KEY (SU_ID), FOREIGN KEY (USER_ID) REFERENCES USER_(USER_ID) ON UPDATE CASCADE ); CREATE TABLE INSTRUCTOR ( SU_ID INT NOT NULL, USER_ID INT NOT NULL, DEPARTMENT VARCHAR (40), INSTR_TYPE VARCHAR (40),…
• Using the MySQL client: o Create a new table in the dogs_db database called student (id int, name varchar(50), grade float); o Insert the following 3 new rows into the student table: id 55 66 77 name Carl Davis Dennis Fredrickson Jane Richards grade 61 88 78 O Select all records with a grade between 60 and 80. o Change Carl Davis's grade to 65. o Delete Dennis Fredrickson's row. o Change the grade of all people with an id greater than 55 to 80. • After executing each instruction given above, take a screenshot of your console and place it in a document to send in for review. Number your screenshots 1 to 5 in order of execution. • Modify the Java program Main.java to set the qty for Introduction to Java to 0. • Modify the Java program Main.java to delete all books with id > 8000; and insert: (8001, 'Java ABC', 'Kevin Jones', 3) and (8002, 'Java XYZ', 'Kevin Jones', 5);
Computer Science Like is used to match similar records. For example, where myfield like "cat_" would find all records that start with cat such as "cat food". Whether it's true or false?
You need to provide two files. 1. word/pdf report file 2. you code in *.sql/.txt file 1. word/pdf report file: 1st task: You have to choose a suitable topic. Many topics are available in the internet/other sources. It is better (not mandatory) if your topic is an unique one. 2nd task: Give a description of your topic. Don't put unnecessary description which is not required in generating the ER diagram. (for example: In University DB managament project, you may write that our university is a world class university etc.) 3rd task: You may identify your entities/relationships (not mandatory). Draw you ER diagram according to your description. 4th task: Draw your schema diagram from your ER diagram. It means you have now all the tables with constraints. 5th task: Create the database, tables/objects. Then insert some dummy data (10-20-40 rows). Provide the *.sql file seperately. 6th task: You have already studied the chapter-3 where you studied different query related topics. Apply your…
Consider the following Course table from course management system. Course_name Data Structures Database Discrete Mathematics Programming principles Course_number CS1202 CXB3100 MAT1201 PRG 1102 Table 1 Credit_hours Department DCIS DCIS Maths 4 3 3 4 DCIS Write a trigger that fires when a row is deleted from the above Course table (Table 1). The trigger records in a temporary table, called Removed Courses with the following information: the removed course name, the course number, and the date the course was deleted.
Create a MySQL Database called “CSC306Class”. Create three (3) tables in the database called “studentInf”, “IntructorInf”, and “LikedAndDisliked”. Each table should consist of five columns that are relatable to the table name. Insert at least five row of data in each table. The data can be any information as long as it is related to the table name. If you were able to download and setup an php server on computer. Try to create the database, tables, and rows. Then upload a screenshot and code. Please help me with the practice problem I have created.
KR 21 PPS Thoery & Lab Syllabus (Protected View) - Word A miryala srínivas MS References Mailings Review View Help O Tell me what you want to do contain viruses. Unless you need to edit, it's safer to stay in Protected View. Enable Editing Course Outcomes: After learning the contents of this course the student is able to Choose the appropriate data structure for modeling a given problem. Implement operations like searching, insertion, and deletion, traversing mechanism on various data structures. Students will be able to implement Linear and Non-Linear data structures. Implement appropriate sorting/searching technique for given problem. List of Programs 1. Write a simple program that prints the results of all the operators available in C (including pre/ post increment, bitwise and/or/not, etc.). Read required operand values from standard input. 2. Write a simple program that converts one given data type to another using auto conversion and casting.
de Show Review View Tell me whatyou want to do. Sign in & Share less you need to edit, it's safer to stay in Protected View. Enable Editing Calculate mean value Mean Amean value Ex = sum of all data values (x,, X, X3,) n= number of data values