Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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In SQL
When you use ALTER TABLE to add a column, the new column:
Select one:
a. Will not be created because you cannot add a column after the table is created
b. Becomes the last column in the table
c. Can be placed by adding a GROUP BY clause
d. Becomes the first column in the table
Which clause is used to change a column in a table?
a. SET
b. MODIFY
c. ALTER
d. UPDATE
statement can remove the definition of a table.
alter table
update
drop table
delete
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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- Which of the following statements is correct? A table can contain a maximum of only one column marked as unused. You can delete a table by removing all columns in the table. Using the SET UNUSED clause allows you to free up storage space used by a column. None of the above statements are correct.arrow_forwardWhich of the following is not a correct statement? A table can be modified only if it doesn’t contain any rows of data. The maximum number of characters in a table name is 30. You can add more than one column at a time to a table. You can’t recover data contained in a table that has been truncated.arrow_forwardExplain the difference between truncating a table and deleting a table.arrow_forward
- What is the maximum number of columns you can define as a primary key when using the column-level approach to creating a table? a. 0 b. 1 c. 30 d. 255arrow_forwardWhich command is used to create a table based on data already contained in an existing table?arrow_forwardWhich of the following is true? a. If you truncate a table, you cant add new data to the table. b. If you change the default value of an existing column, all existing rows containing a NULL value in the same column are set to the new DEFAULT value. c. If you delete a column from a table, you cant add a column to the table with the same name as the previously deleted column. d. If you add a column to an existing table, its always added as the last column of the table.arrow_forward
- How do you indicate that a column alias should be used?arrow_forwardWhen you issue the DELETE FROM tablename command without specifying a where condition, Select one: a. The last row will be deleted. b.All rows will be deleted. c.The first row will be deleted. d.No rows will be deleted.arrow_forwardAn "Orders" table has 30 columns, and the report only needs the order total by date. Which transformation should you perform?arrow_forward
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