From 62c951cac84957ba63bd3bc150746921f14aa832 Mon Sep 17 00:00:00 2001
From: Abdul <skabdulkhadeer343@gmail.com>
Date: Fri, 29 Nov 2024 17:15:51 +0530
Subject: [PATCH] Sql Assignment-1 Submission
---
.../AbdulShaik_1546_Assignment1.sql | 266 ++++++++++++++++++
1 file changed, 266 insertions(+)
create mode 100644 Abdul/SqlAssignments/AbdulShaik_1546_Assignment1.sql
diff --git a/Abdul/SqlAssignments/AbdulShaik_1546_Assignment1.sql b/Abdul/SqlAssignments/AbdulShaik_1546_Assignment1.sql
new file mode 100644
index 0000000..901d238
--- /dev/null
+++ b/Abdul/SqlAssignments/AbdulShaik_1546_Assignment1.sql
@@ -0,0 +1,266 @@
+Create Database AssignmentDB1
+
+---------------------------Question1-------------------
+--Create a table with Check, Default constraints
+
+USE AssignmentDB1;
+CREATE TABLE GovernmentEmployee (
+ GovernmentEmployeeID int PRIMARY KEY IDENTITY(1,1),
+ Name varchar(100) NOT NULL,
+ Age int CHECK (Age >= 18 AND Age <= 65),
+ JoiningDate date DEFAULT GETDATE()
+);
+---------------------------Question2-------------------
+/*Create a table with all the below data types and insert records
+INT, Varchar, Char, Nvarchar, Float, Double, Numeric, Date, Datetime*/
+
+USE AssignmentDB1;
+CREATE TABLE Item (
+ ItemID int PRIMARY KEY IDENTITY(1,1),
+ Name varchar(50),
+ Status char(10),
+ Description nvarchar(100),
+ Price float,
+ Discount double precision,
+ TaxRate numeric(5, 2),
+ CreatedDate date,
+ LastUpdated datetime
+);
+
+---------------------------Question 3-------------------------
+/*Create table with Identity and do below operations
+DELETE few rows and then Insert some records.
+Observe the Identity value and same process do it for TRUNCATE
+*/
+USE AssignmentDB1;
+CREATE TABLE Student (
+ StudentID int IDENTITY(1,1),
+ Name nvarchar(50)
+);
+
+use AssignmentDB1;
+INSERT INTO Student VALUES
+('Khadeer'),
+('Abdul'),
+('Vamsi'),
+('Raju'),
+('Sathvik');
+
+-- It will be deleting last row
+DELETE FROM Student WHERE StudentID = IDENT_CURRENT('Student');
+-- Deleting the name with Sathvik
+DELETE from Student where Name = 'Raju';
+
+--when I Inserted new data after delete, its identity column will update from last identity
+INSERT into Student Values
+('Vamsi'),
+('Sathvik');
+
+--Truncating table
+TRUNCATE TABLE Student
+
+--when I Inserted new data after truncating, its identity column will reset to initial state.
+INSERT INTO Student VALUES
+('Khadeer'),
+('Abdul');
+
+-----------------------Question 4--------------------------
+/*Create a table with Computed column*/
+
+--Created Computed Column
+USE AssignmentDB1;
+CREATE TABLE ComputedColumnDemo (
+ ItemPrice money,
+ TaxRate float,
+ TotalPrice as (ItemPrice + (ItemPrice * TaxRate / 100))
+);
+
+----------------------Question 5-----------------------------
+/*Create two tables one with Primary key and other with foreign key
+Try to insert the record which is not there in primary key into the table where Foreign key created
+Try to insert the NULL values into foreign key table*/
+
+CREATE TABLE Department (
+ DepartmentID int PRIMARY KEY IDENTITY(1,1),
+ Name nvarchar(50) NOT NULL
+);
+
+CREATE TABLE Employee (
+ EmployeeID int PRIMARY KEY IDENTITY(1,1),
+ Name nvarchar(50) NOT NULL,
+ DepartmentID int NOT NULL,
+ FOREIGN KEY (DepartmentID) REFERENCES Department(DepartmentID)
+);
+
+--Try to insert the record which is not there in primary key into the table where Foreign key created
+INSERT INTO Employee (Name, DepartmentID) VALUES ('Ganesh', 10);
+--Result
+/*The INSERT statement conflicted with the FOREIGN KEY constraint "FK__Employee__Depart__534D60F1".
+The conflict occurred in database "AssignmentDB1", table "dbo.Department", column 'DepartmentID'.*/
+
+
+-- Trying to enter null in foreign key
+INSERT INTO Employee VALUES ('Ganesh', NULL);
+--Result
+/*Cannot insert the value NULL into column 'DepartmentID', table 'AssignmentDB1.dbo.Employee';
+column does not allow nulls. INSERT fails.*/
+
+--Altering table to insert null values
+ALTER TABLE Employee
+ALTER COLUMN DepartmentID int NULL;
+
+INSERT INTO Employee VALUES ('Ganesh', NULL);
+
+-------------------------Question 6----------------------------------------------
+/*Practice Cascade command*/
+
+
+--Find Constraint Related to Employee Table
+SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE TABLE_NAME = 'Employee';
+
+-- Drop the existing foreign key constraint
+ALTER TABLE Employee
+DROP CONSTRAINT FK_Employee_Department;
+
+-- Add a new foreign key constraint with cascading updates and deletes
+ALTER TABLE Employee
+ADD CONSTRAINT FK_Employee_Department
+FOREIGN KEY (DepartmentID) REFERENCES Department(DepartmentID)
+ON UPDATE CASCADE
+ON DELETE CASCADE;
+
+--Inserting Department (Parent Table) Data
+INSERT INTO Department VALUES
+('CSE'),
+('CSIT'),
+('ECE'),
+('EEE'),
+('MECH');
+
+--Inserting Employee (Child Table) Data
+INSERT INTO Employee VALUES
+('Abdul Shaik',1),
+('Vamsi',1),
+('Laxman',1),
+('Harsha',1),
+('Tejesh',2),
+('Prasanth',2),
+('Nandini',2),
+('Chandu',3),
+('Lokesh',4),
+('Deekshitha',5);
+
+
+DELETE FROM Department WHERE DepartmentID = 2;
+
+--Doing Update Cascading
+
+--Find Constraint Related to Department Table
+SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE TABLE_NAME = 'Department';
+
+--droping column because it is Identity coulmn
+ALTER TABLE Department
+DROP COLUMN DepartmentID;
+
+TRUNCATE TABLE Department
+
+ALTER TABLE Department
+ADD DepartmentID int PRIMARY KEY;
+
+INSERT INTO Department ( DepartmentID, Name )
+VALUES
+(1,'CSE'),
+(2,'CSIT'),
+(3,'ECE'),
+(4,'EEE'),
+(5,'MECH');
+
+ALTER TABLE Employee
+ADD CONSTRAINT FK_Employee_Department
+FOREIGN KEY (DepartmentID) REFERENCES Department(DepartmentID)
+ON UPDATE CASCADE
+ON DELETE CASCADE;
+
+--checking update cascading
+UPDATE Department SET DepartmentID = 10 where DepartmentID = 1;
+
+-------------------Question 7-----------------------------
+/*Alter table:
+Do column data type and length change
+Rename the column name
+Add new column
+Drop existing column
+Remove Constraint*/
+
+
+-- Change column data type and length
+ALTER TABLE Employee ALTER COLUMN Name nvarchar(200);
+
+-- Rename a column
+EXEC sp_rename 'Employee.Name', 'FullName', 'COLUMN';
+
+-- Add a new column
+ALTER TABLE Employee
+ADD Address nvarchar(255);
+
+-- Drop an existing column
+ALTER TABLE Employee
+DROP COLUMN Address;
+
+--Find Constraint Related to Employee Table
+SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE TABLE_NAME = 'Employee';
+
+-- Removing a Foreign Key constraint
+ALTER TABLE Employee
+DROP CONSTRAINT FK_Employee_Department;
+
+
+-----------------------Question 8-----------------------
+/*Check what all properties are inheriting when we do SELECT * INTO <<new table>> FROM <<oldtable>>*/
+
+-- Create Category table
+CREATE TABLE Category (
+ CategoryID int PRIMARY KEY IDENTITY(1,1),
+ CategoryName nvarchar(100) NOT NULL,
+ Description nvarchar(255)
+);
+
+-- Create Product table
+CREATE TABLE [Product] (
+ ProductID int PRIMARY KEY IDENTITY(1,1),
+ ProductName nvarchar(100) NOT NULL,
+ Price decimal(10, 2) NOT NULL,
+ StockQuantity int DEFAULT 0,
+ CategoryID int NOT NULL,
+ CONSTRAINT FK_Category FOREIGN KEY (CategoryID) REFERENCES Category(CategoryID)
+);
+
+-- Insert sample data into Category
+INSERT INTO Category (CategoryName, Description) VALUES
+('Electronics', 'Devices and gadgets'),
+('Books', 'Various genres of literature'),
+('Clothing', 'Apparel and accessories');
+
+-- Insert sample data into Product
+INSERT INTO Product (ProductName, Price, StockQuantity, CategoryID) VALUES
+('Laptop', 999.99, 10, 1),
+('Smartphone', 499.99, 25, 1),
+('Novel', 19.99, 100, 2),
+('T-Shirt', 14.99, 50, 3);
+
+-- Create a new table based on Product
+SELECT * INTO NewProduct FROM [Product];
+
+EXEC sp_help 'NewProduct';
+
+SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE TABLE_NAME = 'NewProduct';
+
+
+INSERT INTO NewProduct VALUES
+('Tab', 999.99, NUll, 1);
+
+--Successfully Copied from one table to another
+--Identity, Nullable(NOT NULL/ NULL)
+
+--Failed to copy from one table to another
+--Foreign Key, Default, Unique,Primary key
\ No newline at end of file
--
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