Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 5RQ
What is the purpose of a column alias?
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Chapter 2 Solutions
Oracle 12c: SQL
Ch. 2 - Prob. 1RQCh. 2 - What are the two required clauses for a SELECT...Ch. 2 - What is the purpose of the SELECT statement?
Ch. 2 - What does an asterisk () in the SELECT clause of a...Ch. 2 - What is the purpose of a column alias?Ch. 2 - How do you indicate that a column alias should be...Ch. 2 - When is it appropriate to use a column alias?
Ch. 2 - What are the guidelines to keep in mind when using...Ch. 2 - Prob. 9RQCh. 2 - What is a NULL value?
Ch. 2 - Which of the following SELECT statements displays...Ch. 2 - Which clause is required in a SELECT...Ch. 2 - Which of the following is not a valid SELECT...Ch. 2 - Which of the following symbols represents...Ch. 2 - Prob. 5MCCh. 2 - Prob. 6MCCh. 2 - Which of the following is a valid SELECT...Ch. 2 - Which of the following symbols is used in a SELECT...Ch. 2 - Prob. 9MCCh. 2 - When must a comma be used in the SELECT clause of...Ch. 2 - Prob. 11MCCh. 2 - Which clause is not required in a SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Prob. 1HOACh. 2 - Prob. 2HOACh. 2 - Prob. 3HOACh. 2 - Prob. 4HOACh. 2 - Prob. 5HOACh. 2 - Prob. 6HOACh. 2 - Prob. 7HOACh. 2 - Create a list of each book title stored in the...Ch. 2 - Prob. 9HOACh. 2 - List all information for each order item. Include...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- When is it appropriate to use a column alias?arrow_forwardWhat are the guidelines to keep in mind when using a column alias?arrow_forwardCreate the following indexes: a. Create an index named TRIP_INDEX1 on the TRIP_NAME column in the TRIPtable. b. Create an index named TRIP_INDEX2 on the TYPE column in the TRIP table. c. Create an index named TRIP_INDEX3 on the LAST_NAME and FIRST_NAME columns in the CUSTOMER 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_forwardHow do you indicate that a column alias should be used?arrow_forwardPerform the following tasks: a. Create an index named ITEM_INDEX1 on the ITEM_NUM column in the ORDER_LINEtable. b. Create an index named ITEM_INDEX2 on the CATEGORY column in the ITEMtable. c. Create an index named ITEM_INDEX3 on the CATEGORY and STOREHOUSE columnsin the ITEM table. d. Create an index named ITEM_INDEX4 on the CATEGORY and STOREHOUSEcolumns in the ITEM table. List categories in descending order.arrow_forward
- Which object in the data dictionary enables you to verify DEFAULT column settings? DEFAULT_COLUMNS DEF_TAB_COLUMNS USER_TAB_COLUMNS None of the abovearrow_forwardWhich type of constraint should you use on a column to allow entering only values above 100? a. PRIMARY KEY b. UNIQUE c. CHECK d. NOT NULLarrow_forwardA new table has been requested to support tracking automated emails sent to customers. Create the table and add data as described below. Tablename: email_log Columns: emailid (numeric), emaildate (datetime), customer# (numeric) Primary key: emailid column, define as an Identity Column Add the following data rows and display resulting rows (if any errors occur, explain why the error is expected) Emaildate = current date, customer# = 1007 Emailid = specify to use the column default value, emaildate = current date, customer# = 1008 Emailid = 25, emaildate = current date, customer# = 1009arrow_forward
- Delete the index named ITEM_INDEX3.arrow_forwardIn the initial creation of a table, if a UNIQUE constraint is included for a composite column that requires the combination of entries in the specified columns to be unique, which of the following statements is correct? a. The constraint can be created only with the ALTER TABLE command. b. The constraint can be created only with the table-level approach. c. The constraint can be created only with the column-level approach. d. The constraint can be created only with the ALTER TABLE MODIFY command.arrow_forwardWhich type of constraint should you use on a column to allow entering only values above 100? ( refer to the tables in the JustLee Books database). a. PRIMARY KEY b. UNIQUE c. CHECK d. NOT NULLarrow_forward
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