From 0c4e665809b61ce06251ce00df142abb410a0dce Mon Sep 17 00:00:00 2001
From: Kshitij <kshitijk@tuta.io>
Date: Wed, 31 Jul 2024 21:37:14 +0530
Subject: [PATCH] Tested all running queries and fixed the ones that weren't
 working.

---
 Practical/Assignment-A2/Queries-A2.md | 61 +++++++++------------------
 1 file changed, 21 insertions(+), 40 deletions(-)

diff --git a/Practical/Assignment-A2/Queries-A2.md b/Practical/Assignment-A2/Queries-A2.md
index 8842081..72dbbc3 100755
--- a/Practical/Assignment-A2/Queries-A2.md
+++ b/Practical/Assignment-A2/Queries-A2.md
@@ -63,7 +63,7 @@ INSERT INTO Loan (loanNum, branchName, amount) VALUES
 (155, "Dhole Patil", 500),
 (156, "Nagarwala", 250),
 (157, "Peachtree", 600),
-(158, "Bishops", 9000),
+(158, "Bishops", 1400),
 (159, "Amanora", 25000);
 
 INSERT INTO Borrower VALUES
@@ -110,118 +110,99 @@ SELECT Borrower.loanNum FROM Borrower INNER JOIN Loan ON Borrower.loanNum = Loan
 
 ```
 
-==TESTING PENDING==
-
 4. List all customers in alphabetical order who have loan from Akurdi branch.
 
 ```sql
-SELECT customerName
-FROM Borrower
-WHERE loanNum IN (SELECT loanNum FROM Loan WHERE branchName = 'Akurdi')
-ORDER BY customerName;
+SELECT customerName FROM Borrower INNER JOIN Loan ON Borrower.loanNum = Loan.loanNum WHERE branchName = "Akurdi" ORDER BY customerName;
 
 ```
 
 5. Find all customers who have an account or loan or both at bank.
 
 ```sql
-SELECT DISTINCT customerName
-FROM (SELECT customerName FROM Account UNION SELECT customerName FROM Borrower) AS Customers;
+SELECT customerName FROM Depositor UNION SELECT customerName FROM Borrower;
 
 ```
 
 6. Find all customers who have both account and loan at bank.
 
 ```sql
-SELECT customerName
-FROM Account
-WHERE customerName IN (SELECT customerName FROM Borrower);
+SELECT customerName FROM Depositor INTERSECT SELECT customerName FROM Borrower;
 
 ```
 
 7. Find all customers who have account but no loan at the bank.
 
 ```sql
-SELECT customerName
-FROM Account
-WHERE customerName NOT IN (SELECT customerName FROM Borrower);
+SELECT customerName FROM Depositor WHERE customerName NOT IN (SELECT customerName FROM Borrower);
 
 ```
 
 8. Find the average account balance at each branch
 
 ```sql
-SELECT branchName, AVG(balance) AS avg_balance
-FROM Account
-GROUP BY branchName;
+SELECT AVG(amount) FROM Loan;
 
 ```
 
 9. Find no. of depositors at each branch.
 
 ```sql
-SELECT branchName, COUNT(DISTINCT customerName) AS num_depositors
-FROM Account
-GROUP BY branchName;
+SELECT branchName, COUNT(*) AS noOfDepositors FROM Account JOIN Depositor ON Account.accountNum = Depositor.accountNum GROUP BY branchName;
 
 ```
 
-10. Find name of Customer and city where customer name starts with Letter P.
+10. Find name of Customer and city where customer name starts with Letter K.
 
 ```sql
-SELECT customerName, city
-FROM Customer
-WHERE customerName LIKE 'P%';
+SELECT customerName, customerCity from Customer where customerName like "K%";
 
 ```
 
 11. Display distinct cities of branch.
 
 ```sql
-SELECT DISTINCT city
-FROM Branch;
+SELECT DISTINCT branchName, branchCity FROM Branch;
 
 ```
 
-12. Find the branches where average account balance > 12000
+12. Find the branches where average account balance > 1200
 
 ```sql
-SELECT branchName
-FROM Account
-GROUP BY branchName
-HAVING AVG(balance) > 12000;
+SELECT branchName FROM Account GROUP BY branchName HAVING AVG(balance) > 1200;
 
 ```
 
 13. Find number of tuples in customer relation.
 
 ```sql
-SELECT COUNT(*) AS num_tuples
-FROM Customer;
+SELECT COUNT(*) FROM Customer;
 
 ```
 
 14. Calculate total loan amount given by bank.
 
 ```sql
-SELECT SUM(amount) AS total_loan_amount
-FROM Loan;
+SELECT SUM(amount) AS amount FROM Loan;
 
 ```
 
 15. Delete all loans with loan amount between 1300 and 1500.
 
 ```sql
-DELETE FROM Loan
-WHERE amount BETWEEN 1300 AND 1500;
+DELETE FROM Borrower WHERE loanNum IN (SELECT loanNum FROM Loan WHERE amount > 1300 AND amount < 1500);
+DELETE FROM Loan WHERE amount > 1300 AND amount < 1500;
 
 ```
 
 16. Delete all tuples at every branch located in Nigdi.
 
 ```sql
-DELETE FROM Account
-WHERE branchName IN (SELECT branchName FROM Branch WHERE city = 'Nigdi');
+DELETE FROM Borrower WHERE loanNum IN (SELECT loanNum FROM Loan WHERE branchName IN (SELECT branchName FROM Branch WHERE branchCity = "Nigdi"));
+DELETE FROM Loan WHERE branchName = (SELECT branchName FROM Branch WHERE branchCity = "Nigdi");
+DELETE FROM Depositor WHERE accountNum IN (SELECT accountNum FROM Account WHERE branchName IN (SELECT branchName FROM Branch WHERE branchCity = "Nigdi"));
+DELETE FROM Account WHERE branchName = (SELECT branchName FROM Branch WHERE branchCity = "Nigdi");
+DELETE FROM Branch WHERE branchName = “Nigdi”;
 
 ```