The given commad ALTER TABLE test MODIFY id NOT NULL; The command will always be executed successfully .a there is a syntax error b O a column can not be changes to be required after creating the table. .c O The command will be executed successfully if the "id" has values in all rows or the table is d O empty

The given commad ALTER TABLE test MODIFY id NOT NULL; The command will always be executed successfully .a there is a syntax error b O a column can not be changes to be required after creating the table. .c O The command will be executed successfully if the "id" has values in all rows or the table is d O empty

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter3: Table Creation And Management

Section: Chapter Questions

Problem 6MC: Which of the following commands creates a new table containing a virtual column? a. CREATE TABLE...

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Similar questions

Which of the following commands removes all data from a table but leaves the tables structure intact? a. ALTER TABLE secustomerorders DROP UNUSED COLUMNS; b. TRUNCATE TABLE secustomerorders; c. DELETE TABLE secustomerorders; d. DROP TABLE secustomerorders;
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.
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Which of the following commands creates a new table containing a virtual column? a. CREATE TABLE newt able AS (SELECT order#, title, quantity, retail FROM orders); b. CREATE TABLE newt able (price NUMBER (3), total NUMBER (8, 2)); c. CREATE TABLE newt able (calc1 NUMBER (4), calc2 NUMBER (4); d. CREATE TABLE newt able (cola NUMBER (3), colb NUMBER (3), cole AS (cola+colb));
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Which of the following commands drops any columns marked as unused from the SECUSTOMERORDERS table?a. DROP COLUMN FROM secustomerorders WHERE column_status = UNUSED;b. ALTER TABLE secustomerorders DROP UNUSED COLUMNS;c. ALTER TABLE secustomerorders DROP (unused);d. DROP UNUSED COLUMNS;
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