Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Textbook Question
Chapter 5, Problem 20MC
What is the maximum number of records that can be modified with a single UPDATE command?
- a. 1
- b. 2
- c. 3
- d. unlimited
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Executing an UPDATE statement will return______.
the number of records updated
the set of records updated
the identifiers of updated records
NULL
(a) Which command makes updates permanent?(b) Which command reverses updates?
(c) Which updates are reversed?
If you're not sure where the update.txt file is on your computer, it's advised that you print
one copy.
Chapter 5 Solutions
Oracle 12c: SQL
Ch. 5 - Which command should you use to copy data from one...Ch. 5 - Which command can you use to change the existing...Ch. 5 - Which of the following is a correct statement? a....Ch. 5 - Which of the following is a valid SQL...Ch. 5 - Which of the following statements deletes all rows...Ch. 5 - What is the maximum number of records that can be...Ch. 5 - Add a new row in the ORDERS table with the...Ch. 5 - Prob. 2HOACh. 5 - Save the changes permanently to the database.
Ch. 5 - Add a new row in the ORDERS table with the...
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- Execute a command that undoes the previous deletion.arrow_forwardIf you are unclear where the update.txt file is stored on your computer, you may want to print a copy for safekeeping.arrow_forward46. The log is a sequence of _________ recording all the update activities in the database. a. Log records b. Records c. Entries d. Redoarrow_forward
- Race between processes is a condition resulting when locking is not used which causes incorrect final version of data. Select one: O True O Falsearrow_forwardIf you're not sure where the update.txt file is on your machine, you can print a copy.arrow_forward5. Fill in the permissions in Table 4-7 with checkmarks, assuming that all four files are in the directory /public, which has a mode of rwxr-xr-x. Table 4-7 Permissions table for Discovery Exercise 5 Filename Mode Read Edit Execute List Delete sample1 User rw-rw-rw- Group Other sample2 r- User Group Other sample3 User rwxr-x--- Group Other sample4 User r-: Group Otherarrow_forward
- It is recommended that you print one copy if you are unsure of the location of the update.txt file on your computer.arrow_forwardUPDATEs and DELETEs can be destructive in nature. What statement might you use to see the rows that will be impacted before executing a DELETE or UPDATE?arrow_forwardYou accidentally deleted all the orders in the ORDERS table. How can the error be corrected after a COMMIT command has been issued?a. ROLLBACK;b. ROLLBACK COMMIT;c. REGENERATE RECORDS orders;d. None of the above restores the deleted ordersarrow_forward
- In a SELECT statement, which clause is used to limit the records that will be selected? a. LIMIT b. ORDER BY c. ONLY d. WHEREarrow_forwarddatabase The select, project and rename operations are called____. Select one: a. Binary operations. b. Ternary Operations. c. None of the above. d. Unary operations.arrow_forward3. Which one of the following is not an attribute displayed by Is command? a) file permissions b) file ownership c) links d) word count of filearrow_forward
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