Homework 1-6 (attempt 2)

.gitignore

@@ -1,3 +1,5 @@
 .DS_Store
 .vscode/
 .sqbpro
+#.sqbpro
+

03_homework/homework_-1-6/Homework_4.sqbpro

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+<?xml version="1.0" encoding="UTF-8"?><sqlb_project><db path="/Users/apple/DSI/sql/05_sql/farmersmarket.db" readonly="0" foreign_keys="1" case_sensitive_like="0" temp_store="0" wal_autocheckpoint="1000" synchronous="2"/><attached/><window><main_tabs open="structure browser pragmas query" current="3"/></window><tab_structure><column_width id="0" width="300"/><column_width id="1" width="0"/><column_width id="2" width="100"/><column_width id="3" width="3698"/><column_width id="4" width="0"/><expanded_item id="0" parent="1"/><expanded_item id="1" parent="1"/><expanded_item id="2" parent="1"/><expanded_item id="3" parent="1"/></tab_structure><tab_browse><current_table name="4,5:mainbooth"/><default_encoding codec=""/><browse_table_settings><table schema="main" name="booth" show_row_id="0" encoding="" plot_x_axis="" unlock_view_pk="_rowid_"><sort/><column_widths><column index="1" value="84"/><column index="2" value="101"/><column index="3" value="300"/><column index="4" value="68"/></column_widths><filter_values/><conditional_formats/><row_id_formats/><display_formats/><hidden_columns/><plot_y_axes/><global_filter/></table></browse_table_settings></tab_browse><tab_sql><sql name="SQL 1">--COALESCE
+SELECT 
+  product_name || ', ' || COALESCE(product_size, '') || ' (' || COALESCE(product_qty_type, 'unit') || ')' AS product_description
+FROM product;
+
+--#1 Windowed Functions
+SELECT customer_id, market_date
+FROM customer_purchases;
+
+SELECT 
+  customer_id, 
+  market_date, 
+  ROW_NUMBER() OVER (PARTITION BY customer_id ORDER BY market_date) AS visit_number
+FROM 
+  customer_purchases;
+
+  -- #2 Reverse the Numbering
+
+SELECT 
+  customer_id, 
+  market_date
+FROM 
+  (
+    SELECT 
+      customer_id, 
+      market_date, 
+      ROW_NUMBER() OVER (PARTITION BY customer_id ORDER BY market_date DESC) AS visit_number
+    FROM 
+      customer_purchases
+  ) AS visits
+WHERE 
+  visit_number = 1;
+
+  -- #3 Using a COUNT()
+SELECT 
+  customer_id, 
+  product_id, 
+  market_date, 
+  COUNT(*) OVER (PARTITION BY customer_id, product_id) AS purchase_count
+FROM 
+  customer_purchases;
+
+
+  --String Manipulation
+  SELECT 
+  product_name,
+  TRIM(SUBSTR(product_name, INSTR(product_name, '-') + 1)) AS description
+FROM 
+  product
+WHERE 
+  INSTR(product_name, '-') &gt; 0;
+
+--UNION
+WITH SalesByDate AS (
+    SELECT 
+        market_date, 
+        SUM(quantity * cost_to_customer_per_qty) AS total_sales
+    FROM 
+        customer_purchases
+    GROUP BY 
+        market_date
+),
+RankedSales AS (
+    SELECT 
+        market_date, 
+        total_sales,
+        RANK() OVER (ORDER BY total_sales DESC) AS sales_rank_desc,
+        RANK() OVER (ORDER BY total_sales ASC) AS sales_rank_asc
+    FROM 
+        SalesByDate
+)
+SELECT 
+    market_date, 
+    total_sales,
+    'Highest Sales' AS description
+FROM 
+    RankedSales
+WHERE 
+    sales_rank_desc = 1
+
+UNION
+
+SELECT 
+    market_date, 
+    total_sales,
+    'Lowest Sales' AS description
+FROM 
+    RankedSales
+WHERE 
+    sales_rank_asc = 1;
+
+</sql><current_tab id="0"/></tab_sql></sqlb_project>

03_homework/homework_2.sqbpro

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+<?xml version="1.0" encoding="UTF-8"?><sqlb_project><db path="/Users/apple/DSI/sql/05_sql/farmersmarket.db" readonly="0" foreign_keys="1" case_sensitive_like="0" temp_store="0" wal_autocheckpoint="1000" synchronous="2"/><attached/><window><main_tabs open="structure browser pragmas query" current="3"/></window><tab_structure><column_width id="0" width="300"/><column_width id="1" width="0"/><column_width id="2" width="100"/><column_width id="3" width="3698"/><column_width id="4" width="0"/><expanded_item id="0" parent="1"/><expanded_item id="1" parent="1"/><expanded_item id="2" parent="1"/><expanded_item id="3" parent="1"/></tab_structure><tab_browse><current_table name="4,5:mainbooth"/><default_encoding codec=""/><browse_table_settings/></tab_browse><tab_sql><sql name="SQL 1">--SELECT Function by last, first name 10 rows
+
+SELECT *FROM customer
+ORDER BY customer_last_name, customer_first_name
+LIMIT 10;
+
+--WHERE #1 Function product IDs 4 and 9.
+SELECT * FROM customer_purchases
+WHERE product_id IN (4, 9);
+
+--WHERE #2 AND and BETWEEN Function
+SELECT *, (quantity * cost_to_customer_per_qty) AS price
+FROM customer_purchases
+WHERE vendor_id BETWEEN 8 and 10;
+
+-- CASE #1
+SELECT product_id, 
+					product_name,
+					CASE
+						WHEN product_qty_type = 'unit' THEN 'unit'
+						ELSE 'bulk'
+					END AS product_qty_type_condensed
+FROM product;
+
+
+-- CASE #2 - 'pepper' function
+SELECT product_id,
+       product_name,
+       CASE
+           WHEN product_qty_type = 'unit' THEN 'unit'
+           ELSE 'bulk'
+       END AS prod_qty_type_condensed,
+       CASE
+           WHEN LOWER(product_name) LIKE '%pepper%' THEN 1
+           ELSE 0
+       END AS pepper_flag
+FROM product;
+
+--JOIN
+SELECT vendor.vendor_id, 
+       vendor.vendor_name, 
+       vendor_booth_assignments.market_date, 
+       vendor_booth_assignments.booth_number
+FROM vendor
+INNER JOIN vendor_booth_assignments
+ON vendor.vendor_id = vendor_booth_assignments.vendor_id
+ORDER BY vendor.vendor_name, vendor_booth_assignments.market_date;
+</sql><current_tab id="0"/></tab_sql></sqlb_project>

03_homework/homework_3.sqbpro

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+<?xml version="1.0" encoding="UTF-8"?><sqlb_project><db path="/Users/apple/DSI/sql/05_sql/farmersmarket.db" readonly="0" foreign_keys="1" case_sensitive_like="0" temp_store="0" wal_autocheckpoint="1000" synchronous="2"/><attached/><window><main_tabs open="structure browser pragmas query" current="3"/></window><tab_structure><column_width id="0" width="300"/><column_width id="1" width="0"/><column_width id="2" width="100"/><column_width id="3" width="3698"/><column_width id="4" width="0"/><expanded_item id="0" parent="1"/><expanded_item id="1" parent="1"/><expanded_item id="2" parent="1"/><expanded_item id="3" parent="1"/></tab_structure><tab_browse><current_table name="4,5:mainbooth"/><default_encoding codec=""/><browse_table_settings><table schema="main" name="booth" show_row_id="0" encoding="" plot_x_axis="" unlock_view_pk="_rowid_"><sort/><column_widths><column index="1" value="84"/><column index="2" value="101"/><column index="3" value="300"/><column index="4" value="68"/></column_widths><filter_values/><conditional_formats/><row_id_formats/><display_formats/><hidden_columns/><plot_y_axes/><global_filter/></table></browse_table_settings></tab_browse><tab_sql><sql name="SQL 1">-- Homework 3 Essential SQL 
+--AGGREGATE #1
+--Vendor booth Acount 
+SELECT vendor_id, COUNT(*) AS booth_count
+FROM  vendor_booth_assignments
+GROUP BY vendor_id;
+
+--AGGREGATE #2
+SELECT c.customer_id, c.customer_last_name, c.customer_first_name,
+SUM(cp.quantity * cp.cost_to_customer_per_qty) AS total_spent
+FROM customer_purchases cp
+JOIN customer c ON cp.customer_id = c.customer_id
+GROUP BY c.customer_id, c.customer_last_name, c.customer_first_name
+HAVING total_spent &gt;2000
+ORDER BY c.customer_last_name, customer_first_name;
+
+-- Temp TABLE
+DROP TABLE IF EXISTS new_vendor;
+CREATE TABLE new_vendor AS SELECT * FROM vendor;
+
+INSERT INTO new_vendor (vendor_id, vendor_name, vendor_type, vendor_owner_first_name, vendor_owner_last_name)
+VALUES (10, 'Thomass Superfood Store', 'Fresh Focused', 'Thomas', 'Rosenthal');
+INSERT INTO new_vendor (vendor_id, vendor_name, vendor_type, vendor_owner_first_name, vendor_owner_last_name)
+VALUES (10, 'Thomass Superfood Store', 'Fresh Focused', 'Thomas', 'Rosenthal');
+
+--DATE
+SELECT
+    customer_id,
+    strftime('%m', market_date) AS month,
+    strftime('%Y', market_date) AS year
+FROM customer_purchases;
+
+--customer spent in April 2019
+SELECT
+    customer_id,
+    SUM(quantity * cost_to_customer_per_qty) AS total_spent
+FROM customer_purchases
+WHERE
+    strftime('%m', market_date) = '04' -- Month is April
+    AND strftime('%Y', market_date) = '2019' -- Year is 2019
+GROUP BY customer_id;
+
+</sql><current_tab id="0"/></tab_sql></sqlb_project>