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Write a query that returns everything in the customer table. */ +SELECT* +FROM customer; - -/* 2. Write a query that displays all of the columns and 10 rows from the cus- tomer table, +/* 2. Write a query that displays all of the columns and 10 rows from the customer table, sorted by customer_last_name, then customer_first_ name. */ - +SELECT* +FROM customer +ORDER BY customer_last_name, customer_first_name +LIMIT 10; --WHERE /* 1. Write a query that returns all customer purchases of product IDs 4 and 9. */ -- option 1 - +SELECT* +FROM customer_purchases +WHERE product_id='4' or product_id='9'; -- option 2 - +SELECT* +FROM customer_purchases +WHERE product_id IN (4,9); /*2. Write a query that returns all customer purchases and a new calculated column 'price' (quantity * cost_to_customer_per_qty), @@ -27,10 +35,17 @@ filtered by vendor IDs between 8 and 10 (inclusive) using either: 2. one condition using BETWEEN */ -- option 1 +SELECT*, +quantity*cost_to_customer_per_qty as price +FROM customer_purchases +WHERE vendor_id >=8 AND vendor_id <=10; -- option 2 - +SELECT*, +quantity*cost_to_customer_per_qty as price +FROM customer_purchases +WHERE vendor_id BETWEEN 8 AND 10; --CASE @@ -38,19 +53,39 @@ filtered by vendor IDs between 8 and 10 (inclusive) using either: Using the product table, write a query that outputs the product_id and product_name columns and add a column called prod_qty_type_condensed that displays the word “unit” if the product_qty_type is “unit,” and otherwise displays the word “bulk.” */ - +SELECT +product_id, +product_name, + CASE WHEN product_qty_type = 'unit' THEN 'unit' + ELSE 'bulk' + END as product_qty_type_condensed +FROM product; /* 2. We want to flag all of the different types of pepper products that are sold at the market. add a column to the previous query called pepper_flag that outputs a 1 if the product_name contains the word “pepper” (regardless of capitalization), and otherwise outputs 0. */ +SELECT +product_id, +product_name, + CASE WHEN product_qty_type = 'unit' THEN 'unit' + ELSE 'bulk' + END as product_qty_type_condensed, + CASE WHEN product_name LIKE '%pepper%' THEN 1 + ELSE 0 + END as pepper_flag +FROM product; --JOIN /* 1. Write a query that INNER JOINs the vendor table to the vendor_booth_assignments table on the vendor_id field they both have in common, and sorts the result by vendor_name, then market_date. */ - +SELECT* +FROM vendor_booth_assignments as vba +INNER JOIN vendor as v + ON vba.vendor_id = v.vendor_id +ORDER BY vendor_name,market_date; @@ -59,7 +94,11 @@ vendor_id field they both have in common, and sorts the result by vendor_name, t -- AGGREGATE /* 1. Write a query that determines how many times each vendor has rented a booth at the farmer’s market by counting the vendor booth assignments per vendor_id. */ - +SELECT +count(booth_number) AS total_booths_rented, +vendor_id +FROM vendor_booth_assignments +GROUP BY vendor_id; /* 2. The Farmer’s Market Customer Appreciation Committee wants to give a bumper @@ -67,6 +106,18 @@ sticker to everyone who has ever spent more than $2000 at the market. Write a qu of customers for them to give stickers to, sorted by last name, then first name. HINT: This query requires you to join two tables, use an aggregate function, and use the HAVING keyword. */ +SELECT +c.customer_first_name, +c.customer_last_name, +SUM(quantity*cost_to_customer_per_qty) as total_spend +FROM customer_purchases as cp +LEFT JOIN customer as c + ON cp.customer_id=c.customer_id +GROUP BY cp.customer_id +HAVING total_spend>=2000 +ORDER BY c.customer_last_name,c.customer_first_name; + + @@ -82,7 +133,23 @@ When inserting the new vendor, you need to appropriately align the columns to be VALUES(col1,col2,col3,col4,col5) */ +--drop table if needed +DROP TABLE IF EXISTS temp.new_vendor; + +--creating temp table +CREATE TABLE temp.new_vendor AS +--defining temp table +SELECT* +FROM vendor; + +--adding 10th vendor to temp.new_vendor +INSERT INTO temp.new_vendor (vendor_id,vendor_name,vendor_type,vendor_owner_first_name,vendor_owner_last_name) +VALUES (10,"Thomas' Superfood Store",'Fresh Focused','Thomas','Rosenthal'); + +--verifying it worked +SELECT * +FROM temp.new_vendor; -- Date /*1. Get the customer_id, month, and year (in separate columns) of every purchase in the customer_purchases table. @@ -90,6 +157,10 @@ VALUES(col1,col2,col3,col4,col5) HINT: you might need to search for strfrtime modifers sqlite on the web to know what the modifers for month and year are! */ +SELECT customer_id, +strftime('%m',market_date) AS 'Month' ,strftime('%Y',market_date) AS 'Year' +FROM customer_purchases; + /* 2. Using the previous query as a base, determine how much money each customer spent in April 2022. @@ -98,3 +169,11 @@ Remember that money spent is quantity*cost_to_customer_per_qty. HINTS: you will need to AGGREGATE, GROUP BY, and filter... but remember, STRFTIME returns a STRING for your WHERE statement!! */ +SELECT +customer_id, +strftime('%m',market_date) AS 'Month', +strftime('%Y',market_date) AS 'Year', +quantity*cost_to_customer_per_qty AS total_spend +FROM customer_purchases +WHERE Month = '04' AND Year = '2022' +GROUP BY customer_id;