Question: 1. Write a SQL command that adds a field for salary (named salary) to a table named employee and does not permit the field to

1. Write a SQL command that adds a field for salary (named salary) to a table named employee and does not permit the field to be null. Use SQL Server syntax. (4) 2. Complete the following query (in SQL) using the IN operator. The class field only allows four values: FR, SO, JR, SR. The query below should display only the last names of students who are either sophomores or juniors. Just finish the query below. (4) SELECT last_name, class FROM student

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