hen writing queries in a programming language, why should we avoid creating a query by concatenating strings and instead use prepared statements or stored procedures in defense against SQL injection? a. concatenating strings helps prevent sql injection b. prepared statements or stored procedures help prevent the user/hacker from deliberately modifying the query by injecting sql instructions in the input values c. prepared statements prevent the query from taking as long to execute d. prepared statements enable the developer to just supply values without injecting sql

1. Which of the following is not part of a standard SQL statement? a. Importable programming libraries b. Predicate c. Expressions d. Clauses

The following two SQL statements will produce the same results. SELECT P_DESCRIPT, P_QOH,P_PRICE FROM PRODUCT WHERE P_QOH >(SELECT P_QOH FROM PRODUCT WHERE P_CODE='11QER/31') AND P_PRICE>(SELECT P_PRICE FROM PRODUCT WHERE P_CODE='11QER/31'); SELECT P_DESCRIPT, P_QOH,P_PRICE FROM PRODUCT WHERE (P_QOH,P_PRICE) > (SELECT P_QOH,P_PRICE FROM PRODUCT WHERE P_CODE='11QER/31'); A) True B) False

Below is "Book Order," the only table in library management system’s database. The design of "Book Order" as you may tell is in the zero normal formal form, you as the database designer want to convert the design into the third normal form. Order ID Special order date Customer ID Customer last name Customer First name Customer birth date Book ISBN1 Book Title 1 Book Author 1 Book publication year 1 Book ISBN2 Book Title 2 Book Author 2 Book publication year 2 Store ID Store name Store location Special order status Book Order(Order ID, Special order date, Customer ID, Customer last name, Customer First name, Customer birth date, Book ISBN1, Book Title 1, Book Author 1, Book publication year 1, Book ISBN2, Book Title 2, Book Author 2, Book publication year 2, Store ID, Store name, Store location, Special order status)

Chapter 16 How to manage transactions and locking Excercises using the My Guitar Shop Database Use Microsoft SQL Server Write a script that includes two SQL statements coded as a transaction to delete the row with a customer ID of 8 from the Customers table. To do this, you must first delete all addresses for that customer from the Addresses table. If these statements execute successfully, commit the changes. Otherwise, roll back the changes.

python - Write the syntax for obtaining the index where X == 0.

calculate_new_balance Given a starting balance (a number), and a list of transaction tuples, calculate the final balance for an account. Transaction tuples are of the shape ("description", amount, "withdrawal") , or ("description", amount, "deposit"). The last entry in the tuple will be either "withdrawal" or "deposit". Every withdrawal decreases the balance of the account by the specified amount, and every deposit increases the balance. The return value is the new account balance, as a number. (which could be negative) Sample calls should look like: >>> calculate_new_balance(100, [("payday", 20, "deposit"), ("new shoes", 50, "withdrawal"), ("illicit winnings", 200, "deposit")])270>>> calculate_new_balance(100, [])100

SQL Query Relational Algebra select avg(customer.age) as "avg_age" from AVG(avg_age) (customer) customer; 1. Select customer phone, customer.address, customer.fullname from customer where exists (select * from billing where billing.cid = customer. Customer id); 2. Select * from customer where customer.address in ('Ibri'); 3. Select billing.bill id from billing Group by bill id Having count (case when billing.b status = 'REJWCTED' then 1 end)>1; select * from customer order by full name, age;