SQL;2008 adds built-in functions. List four capabilities.
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SQL;2008 adds built-in functions. List four capabilities.
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- Differentiate between functions that return a scalar, an aggregate, and a table.Attempt to view the structure of the HOMEWORK13 view.J SHORTAND NOTATION FOR RELATIONAL SQL TABLES Notation Example Meaning Underlined A or A, B The attribute(s) is (are) a primary key Superscript name of relation AR or AR, BR The attribute(s) is (are) a foreign key referencing relation R As an example, the schema R(A, B, C, D, ES) S(F, G, H) corresponds to the following SQL tables: CREATE TABLE R ( A <any SQL type>, B <any SQL type>, C <any SQL type>, D <any SQL type>, E <any SQL type>, PRIMARY KEY(A), FOREIGN KEY (E) REFERENCES S(F) ); CREATE TABLE S ( F <any SQL type>, G <any SQL type>, H <any SQL type>, PRIMARY KEY(F)) EXERCISE Consider the following relational schema, representing five relations describing shopping transactions and information about credit cards generating them [the used notation is explained above]. SHOPPINGTRANSACTION (TransId, Date, Amount, Currency, ExchangeRate, CardNbrCREDITCARD, StoreIdSTORE) CREDITCARD (CardNbr, CardTypeCARDTYPE, CardOwnerOWNER, ExpDate, Limit)…
- q4) Which of the following is the correct definition of alias in SQL statement? a. It is a way of renaming a column heading in the output b. It specifies the table containing the columns listed in the SELECT clause c. It is a value that is unavailable, unassigned, unknown, or inapplicable d. It retrieves information from the database97. When SQL statements are embedded inside 3GL, we call such a program as a. Nested query b. Nested programming c. Distinct query d. Embedded SQLSQL A programmer wrote code with the underlying SQL to check if a user can access / log into a system. SELECT * FROM users WHERE login = ‘ replaced by the input login ‘ AND password = ‘ replaced by the input password ‘ What is the query if login is ‘OR true -- and password is Hello? Write the query. What does the query above return? What is the name of this security issue?
- relation: Book (BookID, Author, ISBN, Title) Write a PL/SQL block of code that performs the following tasks: Read a Book id provided by user at run time and store it in a variable. Fetch the Author and title of the book having the entered id and store them inside two variables Display the fetched book author and title.Create ERD for Real-estate database: There are Many Cities in each State There are Many Zip Codes in each City Many Houses belong to each ZipCode Each House can be one of HouseTypes ( Town House, Residential, Condo, Single Family) Each House can be Sold multiple times. ( entity SalesStudent (snum: integer, sname: string, major: string, level: string, age: integer) Class (cname: string, meets_at: time, room: string, fid: integer) Enrolled (snum: integer, cname: string) Faculty (fid: integer, fname: string, deptid: integer) WRITE THE RELATIONAL QUERY (RELATIONAL ALGEBRA ONLY, NO SQL - WILL RESULT IN DOWNVOTE) Return the class name for all classes with more than two students and class name starts with the letter 'D'.
- #Fill in comments to spec. import sqlite3from contextlib import closing from Objects import Player, Lineup conn = None def connect():global connif not conn:DB_FILE = "player_db.sqlite"conn = sqlite3.connect(DB_FILE)conn.row_factory = sqlite3.Row def close():if conn:conn.close() def get_players():return None #remove this line when code is added.# SQL statement to select all 7 fields for all players # Use a with statement to execute the query # Create a lineup object# use a loop to populate the lineup object with player objects# return the lineup object def get_player(playerID):return None #remove this line when code is added.# SQL statement to select all 7 fields for a player # Use a with statement to execute the query & return a player object if the player exists def add_player(player):return None #remove this line when code is added.# SQL statement to insert 6 fields for a player added to the table # Use a with statement to execute the query def delete_player(player):return None…A better design would be one with the following tables: Patient : | pid | name | dob | addr | tel | Exam : | acc | pid | eid | result | date | ExamDictionary : | eid | name | normal | Questions: Create SQL queries (select statements) that accomplish the following. 1. List all of the Exams for Ms. Jones (pid=12). 2. List all of the Patients that hail from jolly old London. 3. List all of the Exams with results that exceed their normal. 4. List the name of all Patients that had Exams with results that exceed their (the exam’s) normal. 5. List the name of all Patients that had Exams with results that exceed their (the exam’s) normal, but list names only once and in alphabetical order.Sales Database: Customers(custId, lastName, firstName, address, phone, creditLimit) Orders(ordNumber, itemNumber, qtyOrdered.) Items(itemNumber, itemName, price) For the Sales Database referenced above, write the SQL command to create the LineItem table, assuming the Orders table and items table already exist.