Update #4 Finance analysis.sql

Author: SQLicious

RAW SQL/#4 Finance analysis.sql

@@ -1 +1,187 @@
+/*Date created and Last ran in MySQL: 09-12-2023 
+Challenge 4 - Finance Analysis
+Challenge Source: https://steeldata.org.uk/sql4.html */
+
+CREATE DATABASE STEEL_DATA;
+USE STEEL_DATA;
+
+-- Create the Customers table
+CREATE TABLE Customers (
+CustomerID INT PRIMARY KEY,
+FirstName VARCHAR(50) NOT NULL,
+LastName VARCHAR(50) NOT NULL,
+City VARCHAR(50) NOT NULL,
+State VARCHAR(2) NOT NULL
+);
+--------------------
+-- Populate the Customers table
+INSERT INTO Customers (CustomerID, FirstName, LastName, City, State)
+VALUES (1, 'John', 'Doe', 'New York', 'NY'),
+(2, 'Jane', 'Doe', 'New York', 'NY'),
+(3, 'Bob', 'Smith', 'San Francisco', 'CA'),
+(4, 'Alice', 'Johnson', 'San Francisco', 'CA'),
+(5, 'Michael', 'Lee', 'Los Angeles', 'CA'),
+(6, 'Jennifer', 'Wang', 'Los Angeles', 'CA');
+--------------------
+-- Create the Branches table
+CREATE TABLE Branches (
+BranchID INT PRIMARY KEY,
+BranchName VARCHAR(50) NOT NULL,
+City VARCHAR(50) NOT NULL,
+State VARCHAR(2) NOT NULL
+);
+--------------------
+-- Populate the Branches table
+INSERT INTO Branches (BranchID, BranchName, City, State)
+VALUES (1, 'Main', 'New York', 'NY'),
+(2, 'Downtown', 'San Francisco', 'CA'),
+(3, 'West LA', 'Los Angeles', 'CA'),
+(4, 'East LA', 'Los Angeles', 'CA'),
+(5, 'Uptown', 'New York', 'NY'),
+(6, 'Financial District', 'San Francisco', 'CA'),
+(7, 'Midtown', 'New York', 'NY'),
+(8, 'South Bay', 'San Francisco', 'CA'),
+(9, 'Downtown', 'Los Angeles', 'CA'),
+(10, 'Chinatown', 'New York', 'NY'),
+(11, 'Marina', 'San Francisco', 'CA'),
+(12, 'Beverly Hills', 'Los Angeles', 'CA'),
+(13, 'Brooklyn', 'New York', 'NY'),
+(14, 'North Beach', 'San Francisco', 'CA'),
+(15, 'Pasadena', 'Los Angeles', 'CA');
+--------------------
+-- Create the Accounts table
+CREATE TABLE Accounts (
+AccountID INT PRIMARY KEY,
+CustomerID INT NOT NULL,
+BranchID INT NOT NULL,
+AccountType VARCHAR(50) NOT NULL,
+Balance DECIMAL(10, 2) NOT NULL,
+FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID),
+FOREIGN KEY (BranchID) REFERENCES Branches(BranchID)
+);
+--------------------
+-- Populate the Accounts table
+INSERT INTO Accounts (AccountID, CustomerID, BranchID, AccountType, Balance)
+VALUES (1, 1, 5, 'Checking', 1000.00),
+(2, 1, 5, 'Savings', 5000.00),
+(3, 2, 1, 'Checking', 2500.00),
+(4, 2, 1, 'Savings', 10000.00),
+(5, 3, 2, 'Checking', 7500.00),
+(6, 3, 2, 'Savings', 15000.00),
+(7, 4, 8, 'Checking', 5000.00),
+(8, 4, 8, 'Savings', 20000.00),
+(9, 5, 14, 'Checking', 10000.00),
+(10, 5, 14, 'Savings', 50000.00),
+(11, 6, 2, 'Checking', 5000.00),
+(12, 6, 2, 'Savings', 10000.00),
+(13, 1, 5, 'Credit Card', -500.00),
+(14, 2, 1, 'Credit Card', -1000.00),
+(15, 3, 2, 'Credit Card', -2000.00);
+--------------------
+-- Create the Transactions table
+CREATE TABLE Transactions (
+TransactionID INT PRIMARY KEY,
+AccountID INT NOT NULL,
+TransactionDate DATE NOT NULL,
+Amount DECIMAL(10, 2) NOT NULL,
+FOREIGN KEY (AccountID) REFERENCES Accounts(AccountID)
+);
+--------------------
+-- Populate the Transactions table
+INSERT INTO Transactions (TransactionID, AccountID, TransactionDate, Amount)
+VALUES (1, 1, '2022-01-01', -500.00),
+(2, 1, '2022-01-02', -250.00),
+(3, 2, '2022-01-03', 1000.00),
+(4, 3, '2022-01-04', -1000.00),
+(5, 3, '2022-01-05', 500.00),
+(6, 4, '2022-01-06', 1000.00),
+(7, 4, '2022-01-07', -500.00),
+(8, 5, '2022-01-08', -2500.00),
+(9, 6, '2022-01-09', 500.00),
+(10, 6, '2022-01-10', -1000.00),
+(11, 7, '2022-01-11', -500.00),
+(12, 7, '2022-01-12', -250.00),
+(13, 8, '2022-01-13', 1000.00),
+(14, 8, '2022-01-14', -1000.00),
+(15, 9, '2022-01-15', 500.00);
+
+-- 1. What are the names of all the customers who live in New York?
+
+SELECT FirstName,
+       LastName
+FROM Customers
+WHERE City = 'New York';
+
+-- 2. What is the total number of accounts in the Accounts table?
+SELECT COUNT(*) AS TotalAccounts
+FROM Accounts;
+
+-- 3. What is the total balance of all checking accounts?
+SELECT SUM(Balance) AS TotalCheckingBalance
+FROM Accounts
+WHERE AccountType = 'Checking';
+
+-- 4. What is the total balance of all accounts associated with customers who live in Los Angeles?
+SELECT SUM(Balance) AS TotalBalanceLosAngeles
+FROM Accounts
+JOIN Customers ON Accounts.CustomerID = Customers.CustomerID
+WHERE Customers.City = 'Los Angeles';
+
+-- 5. Which branch has the highest average account balance?
+SELECT Branches.BranchName, 
+       ROUND(AVG(Accounts.Balance),2) AS AvgBalance
+FROM Branches
+JOIN Accounts ON Branches.BranchID = Accounts.BranchID
+GROUP BY Branches.BranchName
+ORDER BY AvgBalance DESC
+LIMIT 1;
+-- 6. Which customer has the highest current balance in their accounts?
+SELECT Customers.FirstName,
+      Customers.LastName, 
+      MAX(Accounts.Balance) AS MaxBalance
+FROM Customers
+JOIN Accounts ON Customers.CustomerID = Accounts.CustomerID
+GROUP BY Customers.FirstName, Customers.LastName
+ORDER BY MaxBalance DESC
+LIMIT 1;
+
+-- 7. Which customer has made the most transactions in the Transactions table?
+SELECT Customers.FirstName, 
+       Customers.LastName,
+       COUNT(Transactions.TransactionID) AS TotalTransactions
+FROM Customers
+JOIN Accounts ON Customers.CustomerID = Accounts.CustomerID
+JOIN Transactions ON Accounts.AccountID = Transactions.AccountID
+GROUP BY Customers.FirstName, Customers.LastName
+ORDER BY TotalTransactions DESC
+LIMIT 1;
+
+--  8. Which branch has the highest total balance across all of its accounts?
+SELECT Branches.BranchName,
+       SUM(Accounts.Balance) AS TotalBranchBalance
+FROM Branches
+JOIN Accounts ON Branches.BranchID = Accounts.BranchID
+GROUP BY Branches.BranchName
+ORDER BY TotalBranchBalance DESC
+LIMIT 1;
+
+--  9. Which customer has the highest total balance across all of their accounts, including savings and checking accounts?
+SELECT Customers.FirstName,
+       Customers.LastName,
+       SUM(Accounts.Balance) AS TotalBalance
+FROM Customers
+JOIN Accounts ON Customers.CustomerID = Accounts.CustomerID
+GROUP BY Customers.FirstName, Customers.LastName
+ORDER BY TotalBalance DESC
+LIMIT 1;
+
+--  10. Which branch has the highest number of transactions in the Transactions table?
+SELECT Branches.BranchName,
+       COUNT(Transactions.TransactionID) AS TotalTransactions
+FROM Branches
+JOIN Accounts ON Branches.BranchID = Accounts.BranchID
+JOIN Transactions ON Accounts.AccountID = Transactions.AccountID
+GROUP BY Branches.BranchName
+ORDER BY TotalTransactions DESC
+LIMIT 1;