Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Chapter 3, Problem 6RQ
What happens to the existing rows of a table if the DEFAULT value of a column is changed?
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Chapter 3 Solutions
Oracle 12c: SQL
Ch. 3 - Which command is used to create a table based on...Ch. 3 - Prob. 2RQCh. 3 - What guidelines should you follow when naming...Ch. 3 - What is the difference between dropping a column...Ch. 3 - Prob. 5RQCh. 3 - What happens to the existing rows of a table if...Ch. 3 - Explain the difference between truncating a table...Ch. 3 - Prob. 8RQCh. 3 - What happens if you try to decrease the scale or...Ch. 3 - Are a table and the data contained in the table...
Ch. 3 - Which of the following is a correct statement?
You...Ch. 3 - Prob. 2MCCh. 3 - Which of the following is not a correct...Ch. 3 - Which of the following is not a valid SQL...Ch. 3 - Which of the following is true? a. If you truncate...Ch. 3 - Which of the following commands creates a new...Ch. 3 - Which of the following commands drops any columns...Ch. 3 - Which of the following statements is correct?
A...Ch. 3 - Which of the following commands removes all data...Ch. 3 - Which of the following commands changes a table’s...Ch. 3 - Prob. 11MCCh. 3 - Which of the following is not a valid...Ch. 3 - Which of the following characters can be used in a...Ch. 3 - Which of the following is true?
All data in a...Ch. 3 - Prob. 15MCCh. 3 - Which of the following commands creates a new...Ch. 3 - Which of the following is a valid table name? a....Ch. 3 - Prob. 18MCCh. 3 - Which object in the data dictionary enables you to...Ch. 3 - Prob. 20MCCh. 3 - Create a new table containing the category code...Ch. 3 - Create a new table containing these four columns:...Ch. 3 - Add two columns to the EMPLOYEES table. One...Ch. 3 - Modify the Job_class column of the EMPLOYEES table...Ch. 3 - Prob. 5HOACh. 3 - Rename the EMPLOYEES table as JL_EMPS.
Ch. 3 - Create a new table containing these four columns...Ch. 3 - Prob. 8HOACh. 3 - Truncate the BOOK_PRICING table, and then verify...Ch. 3 - Delete the BOOK_PRICING table permanently so that...
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- Which of the following is true? (refer to the tables in the JustLee Books database)a. If you truncate a table, you can’t 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 can’t 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, it’s always added as the last column of the table.arrow_forwardA simple lookup field uses the contents of another table or a value list to validate the contents of a single value per row. * Lookup Wizard O Currency O Numberarrow_forwardArrange the codesarrow_forward
- How do you add a column to an existing table in MySQL? a. MODIFY TABLE table_name ADD COLUMN new_column CHAR(3); b. MODIFY TABLE table_name ADD new_column CHAR(3); c. ALTER TABLE table_name ADD new_column CHAR(3); d. ALTER TABLE table_name ADD COLUMN new_column CHAR(3);arrow_forwardWhich function determines the number of rows in a table? a. ROW b. CALCULATE c. COUNT d. NUMBERarrow_forwardIf I have a table in sql database phpmyadmin the table's column : ID Name Salary City 1 John 200 London 2 Eric 300 Paris 3 Michael 450 Milan in php we have to create dropdown menu show the names coming from the database when the user choose a name from the menu will show the salary for this person . one more thing there is no sumbit button , I mean when the user choose a name from the dropdown menu will show the salary without any click. would you help to create php code and javascript if it's needed.arrow_forward
- SQL : Write a statement that allows the same classmate to modify (insert, update, and delete) the data of the newEmpXX tablearrow_forwardTrue or FalseAn application works directly with a database, modifying rows, deleting rows, adding new rows, and so forth.arrow_forwardTHIS MODULE IS ABOUT SUBQUERIES, SO YOU MUST USE SUBQUERIES INSTEAD OF TABLE JOINS IN THISASSIGNMENT.arrow_forward
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