Optimistic concurrency enforced using a single UPDATE statement can used at what level(s)? A. An attribute...
Optimistic concurrency enforced using a single UPDATE statement
can used at what level(s)?
A. An attribute (field) of a tuple (record)
B. A set of joined relations
C. A relation (table)
D. A tuple (record)
E. A database
Homework Answers
Optimistic concurrency enforced using a single UPDATE statement can used at what level(s)?
answer :- D) a tuple (record)
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Optimistic concurrency enforced using a single UPDATE statement
can used at what level(s)?
A. An attribute...
Database Structures Question (50 points) . (10 points) Consider the join RDRa-Sb S, given the following...
Database Structures
Question (50 points) . (10 points) Consider the join RDRa-Sb S, given the following information about the relations to be joined. Compute O costs for the following join operations. Relation R contains 4,000 tuples with blocking factor 40 .Relation S contains 2,000 tuples with blocking factor 40 Attribute a of relation R refers to attribute b of relation S Attribute b of relation S is the primary key for S Both relations are stored as simple heap files...
6. With respect to database systems, which of the following statement(s) is (are) true? a. The...
6. With respect to database systems, which of the following statement(s) is (are) true? a. The physical view of data is how people conceptually organize and understand the relationships among data items. b. The DML builds the data dictionary, creates the database, describes logical views for each user, and specifies security constraints. c. A record layout shows the items stored in a file, including the type of data stored and both the order and length of the data fields. d....
7.13. Consider the following View definition and update statement: CREATE VIEW TOPPRODUCTS(PRODNR,PRODNAME,QUANTITY) AS SELECT PRODNR, PRODNAME,...
7.13. Consider the following View definition and update statement: CREATE VIEW TOPPRODUCTS(PRODNR,PRODNAME,QUANTITY) AS SELECT PRODNR, PRODNAME, AVAILABLE_QUANTITY FROM PRODUCT WHERE AVAILABLE_QUANTITY>100 WITH CHECK OPTION UPDATE TOPPRODUCTS SET QUANTITY=80 WHERE PRODNR=0153 What will be the result of this? a. The update can be successfully made but only the PRODUCT table will be updated. b. The update can be successfully made and both the View and PRODUCT table will be updated. c. The update will be halted because of the WITH CHECK...
SQL QUERIES 1) Using the Product and PC relations, create both tables in your database and...
SQL QUERIES
1) Using the Product and PC relations, create both tables in
your database and insert all the data. Show the SQL statements to
create each table and show a representative SQL insert statement
for the data in each table (i.e. you do not need to show insert
statements for all the data).
– For the remaining questions, assume that your SQL is part of
a program function and the function provides the input needed for
your SQL query....
can you answer part e of the question Q.31 Answer the following questions (a) Explain difference between lossy decomposition and lossless decomposition (b) If you write a SQL statement to inner jo...
can you answer part e of the question
Q.31 Answer the following questions (a) Explain difference between lossy decomposition and lossless decomposition (b) If you write a SQL statement to inner join the following two tables based on Plocation value as inner join condition, is the result table lossy or lossless? (Explain why?) EMP LOCS P.K EMP PROJ1 Hours Pname Plocation Р.К. (c) Given a relation schema R ={SSN, Ename, Pnumber, Pname, Plocation, Hours) R is decomposed to R1, R2,...
Using MySQL commands answer the questions listed below using the Premier Products Company schema. 1.Using Views...
Using MySQL commands answer the questions listed below using the Premier Products Company schema. 1.Using Views a) Create a view called part_location that has the following attributes: part_num, part_description, part_quantity, warehouse_name, warehouse_address. This data comes from the part and warehouse entities. b) Write a query using the view that shows the total number of parts ordered from each warehouse. The output should look like this: 2. Using Triggers a) Execute the following SQL to create the customer_audit table in the...
c. it will print better than a word d. it is easier to write in HTML...
c. it will print better than a word d. it is easier to write in HTML 46. The part of a database that is used for 42. In the following diagram, transition processing document effects been set on slide(s) casy input of data is a. Forms b. Queries c. Reports d. Tables 47 is NOT an example of a common data type found in most databases a a 1 and 2 b. b 3 and 4 c cl and 3...
Garden Glory Project Questions The following Garden Glory database design is used in Chapter 3: OWNER...
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Label the elements of the Access window shown in FIGURE 10-23. FIGURE 10-23 | All Access...
Label the elements of the Access window shown in FIGURE 10-23. FIGURE 10-23 | All Access Obje « Match each term with the statement that best describes it. 9. Database 10. Object 11. Form 12. Record 13. Table 14. Field a. One row of data in a database table b. Information about one item in a particular record in a database c. An app component, such as a table or form that is saved in a database d. A collection...
593 Math Activity 93 MATH ACTIVITY 9.3 Sorting by Rules Materials: Attribute Pieces in the Manipu...
593 Math Activity 93 MATH ACTIVITY 9.3 Sorting by Rules Materials: Attribute Pieces in the Manipulative Kit or Virtual Manipulatives. anipulatives Purpose: Identify input and output sets and create sorting rules that are functions 1. Six attribute picces have been sorted as shown in the diagram here. .Aa. Sort the remainder of the athi bute pieces into two groups in a way that you think the pieces in groups A and B suggest and record the sorting rule you used....
Database Structures
Question (50 points) . (10 points) Consider the join RDRa-Sb S, given the following information about the relations to be joined. Compute O costs for the following join operations. Relation R contains 4,000 tuples with blocking factor 40 .Relation S contains 2,000 tuples with blocking factor 40 Attribute a of relation R refers to attribute b of relation S Attribute b of relation S is the primary key for S Both relations are stored as simple heap files...
6. With respect to database systems, which of the following statement(s) is (are) true? a. The physical view of data is how people conceptually organize and understand the relationships among data items. b. The DML builds the data dictionary, creates the database, describes logical views for each user, and specifies security constraints. c. A record layout shows the items stored in a file, including the type of data stored and both the order and length of the data fields. d....
7.13. Consider the following View definition and update statement: CREATE VIEW TOPPRODUCTS(PRODNR,PRODNAME,QUANTITY) AS SELECT PRODNR, PRODNAME, AVAILABLE_QUANTITY FROM PRODUCT WHERE AVAILABLE_QUANTITY>100 WITH CHECK OPTION UPDATE TOPPRODUCTS SET QUANTITY=80 WHERE PRODNR=0153 What will be the result of this? a. The update can be successfully made but only the PRODUCT table will be updated. b. The update can be successfully made and both the View and PRODUCT table will be updated. c. The update will be halted because of the WITH CHECK...
SQL QUERIES
1) Using the Product and PC relations, create both tables in
your database and insert all the data. Show the SQL statements to
create each table and show a representative SQL insert statement
for the data in each table (i.e. you do not need to show insert
statements for all the data).
– For the remaining questions, assume that your SQL is part of
a program function and the function provides the input needed for
your SQL query....
can you answer part e of the question
Q.31 Answer the following questions (a) Explain difference between lossy decomposition and lossless decomposition (b) If you write a SQL statement to inner join the following two tables based on Plocation value as inner join condition, is the result table lossy or lossless? (Explain why?) EMP LOCS P.K EMP PROJ1 Hours Pname Plocation Р.К. (c) Given a relation schema R ={SSN, Ename, Pnumber, Pname, Plocation, Hours) R is decomposed to R1, R2,...
c. it will print better than a word d. it is easier to write in HTML 46. The part of a database that is used for 42. In the following diagram, transition processing document effects been set on slide(s) casy input of data is a. Forms b. Queries c. Reports d. Tables 47 is NOT an example of a common data type found in most databases a a 1 and 2 b. b 3 and 4 c cl and 3...
Label the elements of the Access window shown in FIGURE 10-23. FIGURE 10-23 | All Access Obje « Match each term with the statement that best describes it. 9. Database 10. Object 11. Form 12. Record 13. Table 14. Field a. One row of data in a database table b. Information about one item in a particular record in a database c. An app component, such as a table or form that is saved in a database d. A collection...
593 Math Activity 93 MATH ACTIVITY 9.3 Sorting by Rules Materials: Attribute Pieces in the Manipulative Kit or Virtual Manipulatives. anipulatives Purpose: Identify input and output sets and create sorting rules that are functions 1. Six attribute picces have been sorted as shown in the diagram here. .Aa. Sort the remainder of the athi bute pieces into two groups in a way that you think the pieces in groups A and B suggest and record the sorting rule you used....
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