What is a NULL value?
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A: GIVEN: What are the conditions where a foreign key must not be null?
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Q: Is a null value comparable to a blank space or a zero value?
A: GIVEN: Is a null value comparable to a blank space or a zero value?
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Q: that
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What is a NULL value?
Null value:
- A NULL value is a special value that is used to represent the missing value.
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- Write a jquery codein sql The EMPLOYEE table contains these columns: EMP_ID NOT NULL, Primary Key SSNUM NOT NULL, Unique LAST_NAME VARCHAR2(25) FIRST_NAME VARCHAR2(25) DEPT_ID NUMBER Foreign Key to DEPT_ID column of the DEPARTMENT table SALARY NUMBER(8,2). You execute this statement:CREATE INDEX emp_name_idx ON employee(last_name, first_name); Which statement is true? Select one: a. The statement creates a composite non-unique index b. The statement creates a composite unique index. c. The statement creates a function-based index. d. The statement fails because of a syntax error.pl/sql Product(pid, pname, pprice, category) Use the table given above to write a PL/SQL procedure that accepts a category value as parameter and prints name and price of all products in that category sorted according to the name; prints the total price of all products on screen; handles the following exceptions by printing an error message: One relevant named exception One unnamed exception with oracle error number ORA-01555 If the price of any product is negative, treat this as a user defined exception.