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diff --git a/02_activities/assignments/Cohort_8/assignment1.sql b/02_activities/assignments/Cohort_8/assignment1.sql
index c992e3205..017053054 100644
--- a/02_activities/assignments/Cohort_8/assignment1.sql
+++ b/02_activities/assignments/Cohort_8/assignment1.sql
@@ -4,17 +4,24 @@
 
 --SELECT
 /* 1. 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, 
 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. */
-
+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), 
@@ -22,11 +29,23 @@ filtered by customer IDs between 8 and 10 (inclusive) using either:
 	1.  two conditions using AND
 	2.  one condition using BETWEEN
 */
+
 -- option 1
 
+SELECT *,
+       quantity * cost_to_customer_per_qty AS price
+FROM customer_purchases
+WHERE customer_id >= 8
+  AND customer_id <= 10;
+
+
 
 -- option 2
 
+SELECT *,
+       quantity * cost_to_customer_per_qty AS price
+FROM customer_purchases
+WHERE customer_id BETWEEN 8 AND 10;
 
 
 --CASE
@@ -35,19 +54,46 @@ Using the product table, write a query that outputs the product_id and product_n
 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 prod_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 prod_qty_type_condensed,
+    CASE
+        WHEN LOWER(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
+    v.*,
+    vba.*
+FROM vendor AS v
+INNER JOIN vendor_booth_assignments AS vba
+    ON v.vendor_id = vba.vendor_id
+ORDER BY
+    v.vendor_name,
+    vba.market_date;
 
 
 /* SECTION 3 */
@@ -56,7 +102,11 @@ vendor_id field they both have in common, and sorts the result by vendor_name, t
 /* 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 
+    vendor_id,
+    COUNT(*) AS times_rented
+FROM vendor_booth_assignments
+GROUP BY vendor_id;
 
 /* 2. The Farmer’s Market Customer Appreciation Committee wants to give a bumper 
 sticker to everyone who has ever spent more than $2000 at the market. Write a query that generates a list 
@@ -64,7 +114,23 @@ 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_id,
+    c.customer_first_name,
+    c.customer_last_name,
+    SUM(cp.quantity * cp.cost_to_customer_per_qty) AS total_spent
+FROM customer AS c
+JOIN customer_purchases AS cp
+    ON c.customer_id = cp.customer_id
+GROUP BY 
+    c.customer_id,
+    c.customer_first_name,
+    c.customer_last_name
+HAVING 
+    total_spent > 2000
+ORDER BY 
+    c.customer_last_name,
+    c.customer_first_name;
 
 --Temp Table
 /* 1. Insert the original vendor table into a temp.new_vendor and then add a 10th vendor: 
@@ -78,6 +144,15 @@ When inserting the new vendor, you need to appropriately align the columns to be
 VALUES(col1,col2,col3,col4,col5) 
 */
 
+DROP TABLE IF EXISTS new_vendor;
+CREATE TEMPORARY 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, 'Thomas''s Superfood Store', 'Fresh Focused', 'Thomas', 'Rosenthal');
+
+
+SELECT * FROM new_vendor ORDER BY vendor_id;
 
 
 -- Date
diff --git a/02_activities/assignments/Cohort_8/assignment2.sql b/02_activities/assignments/Cohort_8/assignment2.sql
index c2743d3b7..8a828c72d 100644
--- a/02_activities/assignments/Cohort_8/assignment2.sql
+++ b/02_activities/assignments/Cohort_8/assignment2.sql
@@ -11,7 +11,6 @@ SELECT
 product_name || ', ' || product_size|| ' (' || product_qty_type || ')'
 FROM product
 
-
 But wait! The product table has some bad data (a few NULL values). 
 Find the NULLs and then using COALESCE, replace the NULL with a blank for the first column with
 nulls, and 'unit' for the second column with nulls. 
@@ -21,7 +20,18 @@ The `||` values concatenate the columns into strings.
 Edit the appropriate columns -- you're making two edits -- and the NULL rows will be fixed. 
 All the other rows will remain the same. */
 
-
+/*SELECT 
+    product_name,
+    product_size, 
+    product_qty_type
+FROM product
+WHERE product_name IS NULL 
+   OR product_size IS NULL 
+   OR product_qty_type IS NULL;*/
+   
+SELECT 
+    product_name || ', ' || COALESCE(product_size, '') || ' (' || COALESCE(product_qty_type, 'unit') || ')'
+FROM product;
 
 
 --Windowed Functions
@@ -35,17 +45,46 @@ each new market date for each customer, or select only the unique market dates p
 HINT: One of these approaches uses ROW_NUMBER() and one uses DENSE_RANK(). */
 
 
+SELECT 
+    customer_id,
+    market_date,
+    DENSE_RANK() OVER (
+        PARTITION BY customer_id 
+        ORDER BY market_date
+    ) AS visit_number
+FROM customer_purchases
+GROUP BY customer_id, market_date;
 
 /* 2. Reverse the numbering of the query from a part so each customer’s most recent visit is labeled 1, 
 then write another query that uses this one as a subquery (or temp table) and filters the results to 
 only the customer’s most recent visit. */
 
-
+SELECT 
+    customer_id,
+    market_date,
+    DENSE_RANK() OVER (
+        PARTITION BY customer_id 
+        ORDER BY market_date DESC
+    ) AS reverse_visit_number
+FROM customer_purchases
+GROUP BY customer_id, market_date;
 
 /* 3. Using a COUNT() window function, include a value along with each row of the 
 customer_purchases table that indicates how many different times that customer has purchased that product_id. */
 
-
+--SELECT * FROM customer_purchases LIMIT 1;
+SELECT 
+    customer_id,
+    product_id,
+    vendor_id,
+    market_date,
+    quantity,
+    cost_to_customer_per_qty,
+    transaction_time,
+    COUNT(*) OVER (
+        PARTITION BY customer_id, product_id
+    ) AS times_purchased
+FROM customer_purchases;
 
 -- String manipulations
 /* 1. Some product names in the product table have descriptions like "Jar" or "Organic". 
@@ -58,12 +97,24 @@ Remove any trailing or leading whitespaces. Don't just use a case statement for
 | Habanero Peppers - Organic | Organic     |
 
 Hint: you might need to use INSTR(product_name,'-') to find the hyphens. INSTR will help split the column. */
-
+SELECT 
+    product_name,
+    CASE 
+        WHEN INSTR(product_name, '-') > 0 THEN
+            TRIM(SUBSTR(product_name, INSTR(product_name, '-') + 1))
+        ELSE NULL
+    END AS description
+FROM product;
 
 
 /* 2. Filter the query to show any product_size value that contain a number with REGEXP. */
 
-
+SELECT 
+    product_id,
+    product_name,
+    product_size
+FROM product
+WHERE product_size REGEXP '[0-9]';
 
 -- UNION
 /* 1. Using a UNION, write a query that displays the market dates with the highest and lowest total sales.
@@ -75,7 +126,41 @@ HINT: There are a possibly a few ways to do this query, but if you're struggling
 3) Query the second temp table twice, once for the best day, once for the worst day, 
 with a UNION binding them. */
 
+--1
+WITH daily_sales AS (
+    SELECT 
+        market_date,
+        SUM(quantity * cost_to_customer_per_qty) AS total_sales
+    FROM customer_purchases
+    GROUP BY market_date
+)
+
+--2
+, ranked_sales 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 daily_sales
+)
+
+--3
+SELECT 
+    market_date,
+    total_sales,
+    'Highest Sales Day' AS sales_type
+FROM ranked_sales
+WHERE sales_rank_desc = 1
+
+UNION
 
+SELECT 
+    market_date,
+    total_sales,
+    'Lowest Sales Day' AS sales_type
+FROM ranked_sales
+WHERE sales_rank_asc = 1;
 
 
 /* SECTION 3 */
@@ -91,7 +176,26 @@ Think a bit about the row counts: how many distinct vendors, product names are t
 How many customers are there (y). 
 Before your final group by you should have the product of those two queries (x*y).  */
 
-
+WITH vendor_products AS (
+    SELECT DISTINCT 
+        v.vendor_name,
+        p.product_name,
+        vi.original_price
+    FROM vendor_inventory vi
+    JOIN vendor v ON vi.vendor_id = v.vendor_id
+    JOIN product p ON vi.product_id = p.product_id
+),
+distinct_customers AS (
+    SELECT COUNT(DISTINCT customer_id) AS total_customers
+    FROM customer
+)
+SELECT 
+    vp.vendor_name,
+    vp.product_name,
+    5 * vp.original_price * dc.total_customers AS potential_revenue
+FROM vendor_products vp
+CROSS JOIN distinct_customers dc
+ORDER BY potential_revenue DESC;
 
 -- INSERT
 /*1.  Create a new table "product_units". 
@@ -99,11 +203,42 @@ This table will contain only products where the `product_qty_type = 'unit'`.
 It should use all of the columns from the product table, as well as a new column for the `CURRENT_TIMESTAMP`.  
 Name the timestamp column `snapshot_timestamp`. */
 
+DROP TABLE IF EXISTS product_units;
 
+CREATE TABLE product_units AS
+SELECT 
+    product_id,
+    product_name,
+    product_size,
+    product_category_id,
+    product_qty_type,
+    CURRENT_TIMESTAMP AS snapshot_timestamp
+FROM product
+WHERE product_qty_type = 'unit';
+
+--Verify the product_units table was created 
+SELECT * FROM product_units;
 
 /*2. Using `INSERT`, add a new row to the product_units table (with an updated timestamp). 
 This can be any product you desire (e.g. add another record for Apple Pie). */
 
+INSERT INTO product_units (
+    product_id,
+    product_name, 
+    product_size,
+    product_category_id,
+    product_qty_type,
+    snapshot_timestamp
+)
+VALUES (
+    (SELECT MAX(product_id) + 1 FROM product_units),
+    'Chocolate Chip Cookies',
+    '12 oz',
+    3,  -- Assuming 3 is the baked goods category
+    'unit',
+    CURRENT_TIMESTAMP
+);
+SELECT * FROM product_units ORDER BY product_id DESC LIMIT 5;
 
 
 -- DELETE
@@ -111,6 +246,9 @@ This can be any product you desire (e.g. add another record for Apple Pie). */
 
 HINT: If you don't specify a WHERE clause, you are going to have a bad time.*/
 
+DELETE FROM product_units WHERE product_id = 24;
+
+SELECT * FROM product_units WHERE product_id = 24;
 
 
 -- UPDATE
@@ -131,5 +269,44 @@ Finally, make sure you have a WHERE statement to update the right row,
 When you have all of these components, you can run the update statement. */
 
 
+--Add the column
+ALTER TABLE product_units
+ADD current_quantity INT;
 
+--Verify column added
+SELECT * FROM product_units LIMIT 1;
+
+--Find products in product_units that have NO vendor_inventory data
+SELECT pu.product_id, pu.product_name
+FROM product_units pu
+LEFT JOIN vendor_inventory vi ON pu.product_id = vi.product_id
+WHERE vi.product_id IS NULL
+GROUP BY pu.product_id, pu.product_name;
+
+--Write the UPDATE with COALESCE to handle NULLs
+/*UPDATE product_units
+SET current_quantity = (
+    SELECT COALESCE(vi.quantity, 0)
+    FROM vendor_inventory vi
+    WHERE vi.product_id = product_units.product_id
+    ORDER BY vi.market_date DESC
+    LIMIT 1
+);*/
+
+UPDATE product_units
+SET current_quantity = COALESCE(
+    (
+        SELECT quantity
+        FROM vendor_inventory vi
+        WHERE vi.product_id = product_units.product_id
+        ORDER BY market_date DESC
+        LIMIT 1
+    ), 
+    0
+);
+
+--Verify the UPDATE worked
+SELECT product_id, product_name, current_quantity 
+FROM product_units 
+ORDER BY product_id;