CREATE TABLE Services (Service_ID INT, Service_name VARCHAR)
CREATE TABLE First_Notification_of_Loss (FNOL_ID INT, Customer_ID INT, Policy_ID INT, Service_ID INT)
CREATE TABLE Settlements (Settlement_ID INT, Claim_ID INT, Effective_Date DATE, Settlement_Amount FLOAT)
CREATE TABLE Available_Policies (Policy_ID INT, policy_type_code CHAR, Customer_Phone VARCHAR)
CREATE TABLE Claims (Claim_ID INT, FNOL_ID INT, Effective_Date DATE)
CREATE TABLE Customers (Customer_ID INT, Customer_name VARCHAR)
CREATE TABLE Customers_Policies (Customer_ID INT, Policy_ID INT, Date_Opened DATE, Date_Closed DATE)

Draw a bar chart for what is the ordered list of customer ids?
SELECT Customer_name, Customer_ID FROM Customers ORDER BY Customer_ID
SELECT "Customer_name", "Customer_ID" FROM "Customers" ORDER BY "Customer_ID" NULLS FIRST