Question: Which of the following SQL statements is valid? a. SELECT order# FROM orders WHERE shipdate = NULL; b. SELECT order# FROM orders WHERE shipdate =

Which of the following SQL statements is valid?
a. SELECT order# FROM orders WHERE shipdate = NULL;
b. SELECT order# FROM orders WHERE shipdate = 'NULL';
c. SELECT order# FROM orders WHERE shipdate = "NULL";
d. None of the statements are valid.

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