SQL code For all Tasks

SQL.sql

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+CREATE DATABASE AssignmentDWH;
+USE AssignmentDWH;
+
+GO
+-- Create the source table
+CREATE TABLE Employee_Q3 (
+    ID INT,
+    Name VARCHAR(255),
+    City VARCHAR(255),
+    Email VARCHAR(255),
+    Schedule_Date DATE
+);
+
+-- Populate the source table with sample data
+
+
+INSERT INTO Employee_Q3 (ID, Name, City, Email, Schedule_Date)
+VALUES
+    (1001, 'Ahmed', 'zayed1ppppp', 'ahmed@mail.com', GETDATE()+1),
+    (1002, 'Mohamed', 'zayed2ddd', 'nehal@mail.com', GETDATE()+1),
+    (1003, 'zeyad', 'zayed3mmmmm', 'asem@mail.com', GETDATE()+1);
+
+SELECT * FROM Employee_Q3;
+
+--TRUNCATE TABLE Employee_Q3;
+
+
+-- Create the target table if it doesn't exist
+CREATE TABLE Target_Table (
+    Emp_Key INT IDENTITY(1,1) PRIMARY KEY,
+    ID INT,
+    Name VARCHAR(255),
+    City VARCHAR(255),
+    Email VARCHAR(255),
+    Insert_Date DATE,
+    Active_Flag INT,
+    Version_No INT
+);
+
+
+SELECT* FROM Target_Table;
+
+--TRUNCATE TABLE Target_Table;
+
+
+
+-----------------------------Q2
+--DROP TABLE Employee_Q2
+CREATE TABLE Employee_Q2 (
+    ID INT,
+    Name VARCHAR(50),
+    City VARCHAR(50),
+    Email VARCHAR(100),
+    Update_Date datetime,
+);
+
+INSERT INTO Employee_Q2 (ID, Name, City, Email, Update_Date) 
+VALUES 
+(1001, 'Ahmed', 'Cairo', 'ahmed@mail.com', '2024-04-20'),
+(1002, 'Nehal', 'Giza', 'nehal@mail.com', '2024-04-20'),
+(1003, 'Asem', 'Cairo', 'asem@mail.com', '2024-04-20');
+
+
+
+
+-- Create the target table
+CREATE TABLE Employee_Latest (
+    ID INT PRIMARY KEY,
+    Name VARCHAR(255),
+    City VARCHAR(255),
+    Email VARCHAR(255),
+    Update_Date datetime,
+);
+
+-- Insert changes into the history table
+Drop table Employee_History
+CREATE TABLE Employee_History (
+    History_ID INT IDENTITY(1,1) PRIMARY KEY,
+    ID INT,
+    Name VARCHAR(255),
+    City VARCHAR(255),
+    Email VARCHAR(255),
+    Update_Date DATEtime,
+    End_Date DATE
+);
+CREATE TABLE Config_table(
+	table_name VARCHAR(255),
+	last_extract_date datetime
+);
+INSERT INTO Config_table (table_name,last_extract_date)
+VALUES ('Employee_Q2','1950-1-1');
+SELECT * FROM Employee_Q2 ;
+SELECT * FROM Employee_Latest ;
+SELECT * FROM Employee_History ;
+SELECT * FROM Config_table;
+
+TRUNCATE TABLE Employee_Q2;
+TRUNCATE TABLE Employee_Latest;
+TRUNCATE TABLE Employee_History;
+TRUNCATE TABLE Config_table;
+
+--------------------Q4
+CREATE TABLE Attendance_Device 
+(
+    id				smallint PRIMARY KEY,
+    employee_id		smallint,
+    finger_print_ts	datetime,
+    in_out			varchar(3)
+);
+
+INSERT INTO Attendance_Device (id, employee_id, finger_print_ts, in_out) VALUES
+	('1', '101', '2024-03-12 9:00:00', 'in'),
+	('2', '101', '2024-03-12 10:00:00', 'in'),
+	('3', '102', '2024-03-12 9:00:00', 'in'),
+	('4', '103', '2024-03-12 11:00:00', 'in'),
+	('5', '104', '2024-03-12 9:15:00', 'in'),
+	('6', '105', '2024-03-12 10:00:00', 'in'),
+	('7', '105', '2024-03-12 11:00:00', 'in'),
+	('8', '105', '2024-03-12 11:30:00', 'in'),
+	('9', '106', '2024-03-12 9:00:00', 'in'),
+	('10', '107', '2024-03-12 9:00:00', 'in'),
+	('11', '108', '2024-03-12 9:00:00', 'in'),
+	('12', '101', '2024-03-12 9:00:00', 'out'),
+	('13', '101', '2024-03-12 17:00:00', 'out'),
+	('14', '101', '2024-03-12 19:00:00', 'out'),
+	('15', '102', '2024-03-12 17:00:00', 'out'),
+	('16', '103', '2024-03-12 17:00:00', 'out'),
+	('17', '105', '2024-03-12 10:00:00', 'out'),
+	('18', '105', '2024-03-12 11:00:00', 'out'),
+	('19', '105', '2024-03-12 18:00:00', 'out'),
+	('20', '106', '2024-03-12 19:00:00', 'out'),
+	('21', '107', '2024-03-12 14:00:00', 'out'),
+	('22', '108', '2024-03-12 17:00:00', 'out');
+
+
+SELECT * FROM Attendance_Device;
+--TERUNCATE TABLE Attendance_Device;
+Drop Table Employee_Attendance_Details
+CREATE TABLE Employee_Attendance_Details (
+    Att_Key smallint IDENTITY(1,1) PRIMARY KEY,
+    Emp_ID smallint,
+    Date DATE,
+    Time_In NVARCHAR(5),
+    Time_Out NVARCHAR(5), 
+    Worked_Hours smallint,
+    State NVARCHAR(50)
+);
+
+
+SELECT * FROM Attendance_Device;
+SELECT * FROM Employee_Attendance_Details;
+
+TRUNCATE TABLE Employee_Attendance_Details;
+TRUNCATE TABLE Attendance_Device;
+
+
+CREATE TABLE University (
+    Name NVARCHAR(MAX),
+    StateProvince NVARCHAR(MAX),
+    Domains NVARCHAR(MAX),
+    WebPages NVARCHAR(MAX),
+    Country NVARCHAR(MAX),
+    AlphaTwoCode NVARCHAR(2)
+);
+
+
+SELECT * FROM University 
+order by Name;
+
+TRUNCATE TABLE University;