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Which command should you use to add data from one table to another?
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Solved in 2 steps
- Explain the difference between truncating a table and deleting a table.Which command is used to create a table based on data already contained in an existing table?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.
- Which 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.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. 255Which of the following symbols is used in a SELECT clause to display all columns from a table? / & * "
- Which of the following is a correct statement? You can restore the data deleted with the DROP COLUMN clause, but not the data deleted with the SET UNUSED clause. You can’t create empty tables—all tables must contain at least three rows of data. A table can contain a maximum of 1000 columns. The maximum length of a table name is 265 characters.Which 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.What is the maximum number of PRIMARY KEY constraints allowed for a table? a. 1 b. 2 c. 30 d. 255