From c1fb80e1a78493c8290099712bd5e5b2234bd010 Mon Sep 17 00:00:00 2001
From: deekshitha <karrideekshitha2002@gmail.com>
Date: Fri, 29 Nov 2024 17:40:44 +0530
Subject: [PATCH] SqlAssignment1
---
.../Deekshitha_karri_1537_assignment1.sql | 200 ++++++++++++++++++
1 file changed, 200 insertions(+)
create mode 100644 deekshitha/SQLAssignment1/Deekshitha_karri_1537_assignment1.sql
diff --git a/deekshitha/SQLAssignment1/Deekshitha_karri_1537_assignment1.sql b/deekshitha/SQLAssignment1/Deekshitha_karri_1537_assignment1.sql
new file mode 100644
index 0000000..e855039
--- /dev/null
+++ b/deekshitha/SQLAssignment1/Deekshitha_karri_1537_assignment1.sql
@@ -0,0 +1,200 @@
+CREATE DATABASE Assignment1;
+
+USE Assignment1;
+Go
+
+--Create table with constraints.
+
+CREATE TABLE Employe(
+ Id int not null,
+ Ename varchar(50),
+ Age int check(age>=18),
+ salary decimal,
+ Email varchar(40) default 'no email');
+
+SELECT * FROM Employe;
+
+INSERT INTO Employe(Id,Ename,Age,salary) VALUES(1,'john',17,20000); --error
+
+INSERT INTO Employe(Id,Ename,Age,salary) VALUES(1,'john',18,20000); --takes default value for email
+
+INSERT INTO Employe VALUES (2,'jane',20,25000,'jane12@gamil.com');
+
+--Create Table with all the datatypes
+
+CREATE TABLE DataTypeEmp(
+ Id int,
+ VName Varchar(20),
+ Cname Char(10),
+ Nname Nvarchar(30),
+ Ftype float(20),
+ Dtype float(53),
+ NumType numeric,
+ DateType date,
+ DTtype Datetime);
+
+INSERT INTO DataTypeEmp VALUES(1,'abc','jfghjkl','dfsjgfdlfg',21.456789456789456789,3.12345678909876543212345678,765432345676543,'2012-11-12','2012-11-20');
+
+SELECT * FROM DataTypeEmp;
+
+INSERT INTO DataTypeEmp VALUES(2,'fdsfhgjhkjklkjhgf','jfghjkl','dfsjgfdlfg',21.456789456789456789345678987654345679,3.1234567890987654321234567845678786889,765432344567898678,'2012-11-12','2012-11-20 19:07:02');
+
+--Create table with Identity
+
+CREATE TABLE Student(
+ Id int Identity(1,1),
+ Sname varchar(20),
+ Email varchar(20));
+
+INSERT INTO Student VALUES('john','john@123'),('jane','jane@123'),('paul','paul@123');
+
+SELECT * FROM Student;
+
+DELETE FROM Student where Id=3;
+
+INSERT INTO Student VALUES('john','john@123'),('jane','jane@123'),('paul','paul@123');
+
+TRUNCATE TABLE Student;
+
+INSERT INTO Student VALUES('john','john@123'),('jane','jane@123'),('paul','paul@123');
+
+SELECT SCOPE_IDENTITY() AS LastInsertedID;
+
+--Computed columns
+
+CREATE TABLE CustomerSale(
+ Id int,
+ Fname varchar(20),
+ Lname varchar(20),
+ FullName AS (Fname+' '+Lname) PERSISTED,
+ Quantity int,
+ UnitPrice decimal(10,2),
+ TotalPrice AS (Quantity*UnitPrice)
+ );
+
+CREATE TABLE CustomerSale1(
+ Id int,
+ Fname varchar(20) NOT NULL,
+ Lname varchar(20) NULL,
+ FullName AS (Fname+' '+Lname) UNIQUE ,
+ Quantity int NULL,
+ UnitPrice decimal(10,2) NULL,
+ TotalPrice AS (Quantity*UnitPrice) PERSISTED PRIMARY KEY
+ ); --Accepts only unique and primary key constraints
+
+INSERT INTO CustomerSale1(Id,Fname,Quantity,UnitPrice) VALUES(1,'paul',2,500);
+
+INSERT INTO CustomerSale1(Id,Fname,Quantity,UnitPrice) VALUES(2,'paul1',3,400); --ERROR (unique)
+
+INSERT INTO CustomerSale(Id,Fname) VALUES(1,'paul'); -- Full name null
+
+INSERT INTO CustomerSale VALUES(1,'john','paul',2,500);
+
+SELECT * FROM CustomerSale;
+
+SELECT * FROM CustomerSale1;
+
+UPDATE CustomerSale SET FullName='jane paul' WHERE Id=1; --cannot modify
+
+--Primary and Foreign key
+
+CREATE TABLE Users (
+ ID int primary key,
+ Uname varchar(20),
+ Email varchar(20));
+
+
+CREATE TABLE Roles(
+ RoleId int primary key,
+ RName varchar(20),
+ UserID int foreign key(UserID) references Users(ID)
+ on delete cascade on update cascade) ;
+
+
+
+INSERT INTO Users VALUES(1,'user1','user1@123'),(2,'user2','user2@123');
+
+INSERT INTO Roles VALUES(1,'Admin',1);
+
+INSERT INTO Roles VALUES(2,'Admin',3); --error The INSERT statement conflicted with the FOREIGN KEY constraint "FK__Roles__UserID__68487DD7".
+
+INSERT INTO Roles(RoleId,RName) VALUES(2,'Admin');
+
+INSERT INTO Roles VALUES(4,'User',4);
+
+SELECT * FROM Roles;
+
+SELECT * FROM Users;
+
+DELETE FROM Users WHERE ID=1; --deletes in both tables
+
+DELETE FROM Roles WHERE RoleId=2;
+
+INSERT INTO Users VALUES(1,'user1','user1@123');
+
+
+UPDATE Users Set ID=3 WHERE ID=4; --Updates in both tables
+
+CREATE TABLE Users1 (
+ ID int primary key,
+ Uname varchar(20),
+ Email varchar(20));
+
+CREATE TABLE Roles1(
+ RoleId int primary key,
+ RName varchar(20),
+ UserID int foreign key(UserID) references Users1(ID)
+ on delete set null on update set null) ;
+
+INSERT INTO Users1 VALUES(1,'user1','user1@123'),(2,'user2','user2@123');
+
+INSERT INTO Roles1 VALUES(1,'Admin',1);
+
+SELECT * FROM Roles1;
+
+SELECT * FROM Users1;
+
+DELETE FROM Users1 WHERE ID=1;
+
+INSERT INTO Users1 VALUES(3,'user1','user1@123'),(5,'user2','user2@123');
+
+INSERT INTO Roles1 VALUES(1,'Admin',2);
+
+UPDATE Users1 Set ID=3 WHERE ID=2;
+
+--Alter Table
+
+CREATE TABLE Course(ID int,Cname varchar(20));
+
+INSERT INTO Course VALUES(1,'cse'),(2,'ece');
+
+SELECT * FROM Course;
+
+ALTER TABLE Course
+ALTER COLUMN Cname Varchar(40); --length
+
+ALTER TABLE Course
+ALTER COLUMN Cname char(40); --datatype
+
+EXEC sp_rename 'Course.Cname' ,'name','Column'; --rename
+
+ALTER TABLE Course ADD Ctype varchar(10) ; --addcolumn
+
+ALTER TABLE Course DROP column Ctype; --dropcolumn
+ALTER TABLE Course drop column ID;
+
+ALTER TABLE Course ADD ID INT NOT NULL;
+ALTER TABLE Course ADD CONSTRAINT pk_Course_id Primary Key (ID);
+
+ALTER TABLE Course DROP CONSTRAINT pk_Course_id;
+
+
+
+
+
+
+
+
+
+
+
--
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