CREATE TABLE Customer_Addresses (customer_id INT, address_id INT, date_address_from DATETIME, address_type VARCHAR, date_address_to DATETIME)
CREATE TABLE Products (product_id INT, product_details VARCHAR)
CREATE TABLE Customers (customer_id INT, payment_method VARCHAR, customer_name VARCHAR, date_became_customer DATETIME, other_customer_details VARCHAR)
CREATE TABLE Addresses (address_id INT, address_content VARCHAR, city VARCHAR, zip_postcode VARCHAR, state_province_county VARCHAR, country VARCHAR, other_address_details VARCHAR)
CREATE TABLE Customer_Contact_Channels (customer_id INT, channel_code VARCHAR, active_from_date DATETIME, active_to_date DATETIME, contact_number VARCHAR)
CREATE TABLE Customer_Orders (order_id INT, customer_id INT, order_status VARCHAR, order_date DATETIME, order_details VARCHAR)
CREATE TABLE Order_Items (order_id INT, product_id INT, order_quantity VARCHAR)

Find the number of customers that use email as the contact channel for each weekday Visualize with a bar chart, order from low to high by the Y-axis please.
SELECT active_from_date, COUNT(active_from_date) FROM Customers AS t1 JOIN Customer_Contact_Channels AS t2 ON t1.customer_id = t2.customer_id WHERE t2.channel_code = 'Email' ORDER BY COUNT(active_from_date)
SELECT "active_from_date", COUNT("active_from_date") FROM "Customers" AS "t1" JOIN "Customer_Contact_Channels" AS "t2" ON "t1"."customer_id" = "t2"."customer_id" AND "t2"."channel_code" = 'Email' ORDER BY COUNT("active_from_date") NULLS FIRST