Examine the following SQL commands: Which statement is true regarding the execution of the above SQL commands?

Question

Exhibit

Options

• ABoth commands execute successfully.
• BThe first CREATE TABLE command generates an error because the NULL constraint is not valid.
• CThe second CREATE TABLE command generates an error because the CHECK constraint is not
• DThe first CREATE TABLE command generates an error because CHECK and PRIMARY KEY
• EThe first CREATE TABLE command generates an error because the column PROD_ID cannot be

• A
  2% (1)
• B
  83% (45)
• C
  4% (2)
• D
  2% (1)
• E
  9% (5)

Explanation

Use TO_NUMBER on the prod_price column to convert from char to number to be able to multiply it with 0.25. Then use the TO_CHAR function (with formatting'$99,999.00') to convert the number back to char. Not C: Use the formatting'$99,999.00' with the TO_CHAR function, not with the TO_NUMBER - Using the TO_CHAR Function The TO_CHAR function returns an item of data type VARCHAR2. When applied to items of type NUMBER, several formatting options are available. The syntax is as follows: TO_CHAR(number1, [format], [nls_parameter]), The number1 parameter is mandatory and must be a value that either is or can be implicitly converted into a number. The optional format parameter may be used to specify numeric formatting information like width, currency symbol, the position of a decimal point, and group (or thousands) separators and must be enclosed in single - Syntax of Explicit Data Type Conversion TO_NUMBER(char1, [format mask], [nls_parameters]) = num1 TO_CHAR(num1, [format mask], [nls_parameters]) = char1 TO_DATE(char1, [format mask], [nls_parameters]) = date1 TO_CHAR(date1, [format mask], [nls_parameters]) = char1

No community discussion yet for this question.