Race.RaceDate is not nullable Questions: Question 10 What constraints would the following command violate? There may be more than one or none. The changes should be taken individually on the data shown above and not as a result of previous problems. Remove RaceType record with rtypeid equal to 1. Entity Integrity O Referential Integrity O Key O Null Domain O None

Race.RaceDate is not nullable Questions: Question 10 What constraints would the following command violate? There may be more than one or none. The changes should be taken individually on the data shown above and not as a result of previous problems. Remove RaceType record with rtypeid equal to 1. Entity Integrity O Referential Integrity O Key O Null Domain O None

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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Assignment Create a database in Access. In the database include the following tables: • Student info which has the following fields o First Name o Last Name o StudentID (primary key) • Courses table which includes the following fields: o CourselD (primary key) o Course Name o CRN • Schedule which contains the following fields: o StudentID o CourselD Create the proper relationships between the tables. Fill the tables with at least 5 students and 2 different classes. You can generate the data randomly by using the Mockaroo site Or you can review Extra Material for more links on how to generate random data Create a report to print out the course and the names of the students taking that course (so group by course). Make sure the report is well formatted, looks professional, include a professional header and a footer.
Task 5: The Developers team also wants you to ensure that emails are converted to lowercase after an update operation. Currently, new insertions are guaranteed to have lowercase emails, but there is no such guarantee for legacy emails. Therefore, the team wants to ensure that emails are being retained in a lowercase irrespective of any changes in the database. Create a new TRIGGER called email_update for the USERS table that runs before an UPDATE operation. Task: Create a TRIGGER to run on the USERS table before any UPDATE operation. (SQL Database Test): Create a TRIGGER before any UPDATE operations on the USERS table
Create a CRUD API to manage recipes. Design the database and create your createDB.sql file. Seed your database with some initial records. Your application should store these recipe fields: id name ingredient_1 ingredient_2 ingredient_3 recipe_author_first_name recipe_author_last_name recipe_category_name Follow RESTful conventions to set up the five standard routes for a CRUD api. Make sure your API responds appropriately to various situations: Errors Invalid requests Etc.
class Database:def __init__(self, db_name):self.db = sqlite3.connect(db_name)self.cursor = self.db.cursor()def create_table(self, table_schema):self.cursor.execute(table_schema)self.db.commit()def insert_data(self, table_name, data):for i in range(len(data)):keys = ", ".join(data.columns)values = ", ".join([f"'{value}'" if pd.isna(value) else str(value) for value in data.iloc[i]])self.cursor.execute(f"INSERT INTO {table_name} ({keys}) VALUES ({values})")self.db.commit()def search_data(self, table_name, year):self.cursor.execute(f"SELECT * FROM {table_name} WHERE year={year}")result = self.cursor.fetchone()if result is not None:return resultelse:return Nonedef delete_data(self, table_name, year):self.cursor.execute(f"DELETE FROM {table_name} WHERE year={year}")self.db.commit()return self.cursor.rowcount > 0 Please rewrite (or convert) the code above with format: def QueryBuilder( Data_Base, Query_Type, Query_Tuple):'''''' Build Query_String'''''' return Query_String
be Used in PL/SQL triggers. OA INSERT OB. DELETE OC. ALTER OD. UPDATE QUESTION 6 The inheritance enables the subtypes entities to inherit-- OA Attributes only OB. nothing OC. Relationships only OD. Relationships and attributes QUESTION 7 Consider the syntax given below. The optional [for each row] clause specifies CREATE OR REPLACE TRIGGER trigger_name [BEFORE / AFTER] [DELETE / INSERT / UPDATE OF column_name] ON table_name
Open the Missing Addresses query in Design view. Add a new column to determine if a customer does not have an address on file. If the customer’s Address is null, it should display Missing. If not, it should display nothing. Name the column AddressPresent. Add criteria of Missing to the column you just created, so only the customers missing an address display. Move the AddressPresent field so it appears between PhoneNumber and Address. Run the query. Ensure only customers with null Address fields display. Save and close the query.
Using the Henry Books database,Henry Books no longer carries books written by Barbara Owen. Delete this author from the authors table. You will insert 2 snips for this question. What construct did you use to delete author Barbara Owens? Insert the snip of the construct used: Insert the snip of the authors table. Be sure all rows are displayed:
Devise a datasheet in access based on a subject table that allows a user to enter information about a subject. Your subject table should have at least ten (10) fields, including:- A primary key field to identify the record ([aut*-RecordIdentifier]).- A single field alternate key.- AT least one date field.- At least one number field.- The standard fields.- Any other fields that you think are appropriate.
Write a script that attempts to insert a new category named “Guitars” into the Categories table. If the insert is successful, the script should display this message: SUCCESS: Record was inserted. If the update is unsuccessful, the script should display a message something like this: FAILURE: Record was not inserted. Error 2627: Violation of UNIQUE KEY constraint 'UQ__Categori__8517B2E0A87CE853'. Cannot insert duplicate key in object 'dbo.Categories'. The duplicate key value is (Guitars).
Part 3: Alter 1. First, write a statement to insert into Property a new entry with unique id 4 without specifying a phone number. You will need to specify the columns you are inserting values into. 2. What happened? What do you see in the phone attribute for that row in the table? 3. Write the statement to alter the table Property to specify a default phone number. Remember you will need single quotes around the number. 4. Write a statement to insert another row into Property with id 5 without specifying a phone number. 5. What happened? What is now in the phone column? Paste the results of a select * from Property. 6. Write the statement to drop the attribute phone from the Property table. 7. Paste the result of select * from Property. 8. Write one statement to alter the table Booking to add a column, propertyNo, which: a. is an integer representing the propertyNo for each booking b. is a foreign key to the propertyNo in the Property table c. has a default value of 1 (i.e., your…
1. You can manage risk in your orders by adding the TakeProfit/StopLoss attributes using fxcmpy. Group of answer choices True False 2. The following code retrieves and prints the candles data using the fxcmpy package. from fxcmpy import fxcmpy_candles_data_reader as cdr print(cdr.get_available_symbols()) Group of answer choices True False 3. Optimizers are a set of procedures defined in SciPy that either find the minimum value of a function or the root of an equation. Group of answer choices True False
Alternate keys: Identify at least five keys (not already listed as PK or FK) needed by end users. These indexes would be considered Alternate or Secondary keys and are mostly used for queries and quick reporting. They may contain multiple columns. Books Authors Bookstore Members Sales transaction table Inventory table