Computers and Technology, 12.10.2020 01:01 trevorhenyan51
Write a SELECT statement that answers this question: What is the total quantity purchased for each instrument within each category? Return these columns: The category_name column from the category table The instrument_name column from the instruments table The total quantity purchased for each instrument with orders in the Order_Items table Use the WITH ROLLUP operator to include rows that give a summary for each category name as well as a row that gives the grand total. Use the IF and GROUPING functions to replace null values in the category_name and instrument_- name columns with literal values if they’re for summary rows
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Write a SELECT statement that answers this question: What is the total quantity purchased for each i...
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