What are “referential constraint actions”?
Answer to relevant QuestionsExplain why the two following commands produce different results.SELECT DISTINCT COUNT (V_CODE) FROM PRODUCT;SELECT COUNT (DISTINCT V_CODE) FROM PRODUCT;Write a query to display the minimum balance, maximum balance, and average balance for memberships that have a rental (result shown in FigureP7.92).Write the SQL code that will create the table structure for a table named EMP_1. This table is a subset of the EMPLOYEE table. The basic EMP_1 table structure is summarized in the table below.Write the SQL code to generate the total hours worked and the total charges made to all projects. The results should be the same as those shown in Figure. Find the customer balance summary for all customers who have not made purchases during the current invoicing period. The results are shown inFigure.
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