CIS 612 Lab Assignment 2

Subject: Modern Database Programming and Big Data Processing

Instructor: Dr. Sunnie S. Chung

Software’s Used:

• Microsoft SQL Server 2012

• SQL Server Management Studio

• Microsoft Visual Studio 2012

Subject: Using UDT, UDF and Table Function

Part 1:

1. Creating User Defined Type GeoPoint, Table Functions Dept_GeoLocations

using System;

using System.Data;

using System.Data.SqlTypes;

using Microsoft.SqlServer.Server; using System.Text;

using System.Collections.Generic;

using System.Linq; using System.Threading.Tasks;

[Serializable]

[Microsoft.SqlServer.Server.SqlUserDefinedType(Format.Native)]

public struct PointType : INullable

{ private bool is_null;

private int _x;

private int _y; public bool IsNull

{

get {

return (is_null);

} }

public static PointType Null

{ get

{

PointType pt = new PointType(); pt.is_null = true;

return pt;

} }

public override string ToString()

{ return _x + ":" + _y;

}

[SqlMethod(OnNullCall = false)]

public static PointType Parse(SqlString s)

{

if (s.IsNull) return Null;

PointType pt = new PointType();

string[] xy = s.Value.Split(":".ToCharArray()); pt.X = Int32.Parse(xy[0]);

pt.Y = Int32.Parse(xy[1]);

return pt;

}

public int X

{ get

{

return this._x;

} set

{

int temp = _x; _x = value;

}

}

public int Y

{

get {

return this._y;

} set

{

int temp = _y; _y = value;

}

} }

Test Script 1:

USE GeoLocationNew

DROP TABLE TablePoints CREATE TABLE dbo.TablePoints (

ID int IDENTITY(1,1) PRIMARY KEY,

Pnt PointType) INSERT INTO dbo.TablePoints (Pnt) VALUES (CONVERT(PointType, '3:4'))

INSERT INTO dbo.TablePoints (Pnt) VALUES (CONVERT(PointType, '-1:5'))

INSERT INTO dbo.TablePoints (Pnt) VALUES (CAST ('1:99' AS PointType))

SELECT ID, Pnt.ToString() as StringPoint,

Pnt.X as X,

Pnt.Y as Y FROM dbo.TablePoints

Output:

Test Script 2:

CREATE TABLE Locations (grid_location dbo.PointType) INSERT INTO Locations (grid_location) VALUES ('3:2') INSERT INTO Locations (grid_location) VALUES ('-1:1') INSERT INTO Locations (grid_location) VALUES ('-1:-1') INSERT INTO Locations (grid_location) VALUES ('-8:-9') INSERT INTO Locations (grid_location) VALUES ('4:-9') ------------------------------------------------------------------- -- -- view the data -- ------------------------------------------------------------------- SELECT * FROM dbo.Locations SELECT grid_location.X AS "X", grid_location.Y AS "Y", grid_location.ToString() AS "Point" FROM Locations ------------------------------------------------------------------- -- -- update some rows -------------------------------------------------------------------- UPDATE dbo.Locations SET grid_location.X = 5 WHERE grid_location.Y < 0 SELECT grid_location.X AS "X", grid_location.Y AS "Y", grid_location.ToString() AS "Point" FROM Locations;

Output:

2. Create Table Function that returns a table Dept_GeoLocations:

Table Function:

using System;

using System.Linq; using System.Text;

using System.Threading.Tasks;

using System.Collections; using System.Data;

using System.Data.SqlClient;

using System.Data.SqlTypes;

using Microsoft.SqlServer.Server;

public class GeoLocation

{ public SqlInt32 Dnumber;

public SqlString Dlocation;

public SqlString Location;

public GeoLocation(SqlInt32 Dnum, SqlString Dloc, SqlString Geoloc)

{ Dnumber = Dnum;

Dlocation = Dloc;

Location = Geoloc;

}

[SqlFunction(

DataAccess = DataAccessKind.Read, FillRowMethodName = "FillRow",

TableDefinition = "(Dnumber int, Dlocation varchar(15), Geolocation

nvarchar")] public static IEnumerable InitMethod()

{

ArrayList resultCollection = new ArrayList();

using (SqlConnection connection = new SqlConnection("context

connection=true"))

{ connection.Open();

using (SqlCommand selectDepartment = new SqlCommand( "SELECT *" +

"FROM [Company].[dbo].[DEPT_LOCATIONS] ",

connection)) {

using (SqlDataReader department_record =

selectDepartment.ExecuteReader()) {

while (department_record.Read())

{ SqlString emailAddress =

department_record.GetSqlString(1);

resultCollection.Add(new GeoLocation( department_record.GetSqlInt32(0),

department_record.GetSqlString(1),

DepartmentLocation.getDepartmentLocation(department_record.GetSqlInt32(0), department_record.GetSqlString(1))

));

} }

}

}

return resultCollection;

}

public static void FillRow(

object emailResultObj,

out SqlInt32 Dnumber, out SqlString Dlocation,

out SqlString GeoLocation)

{

GeoLocation deptResult = (GeoLocation)emailResultObj;

Dnumber = deptResult.Dnumber;

Dlocation = deptResult.Dlocation; GeoLocation = deptResult.Location;

}

}

Scalar Function:

using System;

using System.Collections.Generic; using System.Linq;

using System.Text;

using System.Threading.Tasks; using System.Data.SqlTypes;

public class DepartmentLocation

{

public static SqlString getDepartmentLocation(SqlInt32 departmentID, SqlString dloc)

{

PointType location = new PointType(); String departmentPK = departmentID +""+ (String)dloc;

switch(departmentPK)

{ case "1Houston":

location.X = 3;

location.Y = 2; break;

case "4Stafford":

location.X = -1;

location.Y = 1; break;

case "5Bellaire":

location.X = -1; location.Y = -1;

break;

case "5Sugarland": location.X = -8;

location.Y = -9;

break;

case "5Houston": location.X = 4;

location.Y = -9;

break; }

return location.ToString(); }

}

Test Script:

SELECT * FROM Dept_GeoLocation

Output:

Part 2:

1. Write a Table Function TF_Total_Salary_By_Dept that returns a table

Tab_TotalSalaryByDept with five column info as follows :

Tab_TotalSalaryByDept(

Dept_No INT,

Dept_Name VarChar(30),

COUNT_Emp INT,

SUM_Salary INT,

AVE_Salary INT

)

Table Function:

USE [Company]

GO CREATE FUNCTION TF_Total_Salary_By_Dept()

RETURNS @Tab_TotalSalaryByDept TABLE (

Dept_No INT,

Dept_Name VarChar(30), COUNT_Emp INT,

SUM_Salary INT,

AVE_Salary INT )

AS

BEGIN INSERT INTO @Tab_TotalSalaryByDept(Dept_No, Dept_Name, COUNT_Emp,

SUM_Salary, AVE_Salary)

SELECT DEPARTMENT.Dnumber,DEPARTMENT.Dname,COUNT(EMPLOYEE.Dno) AS

COUNT_Emp ,SUM(EMPLOYEE.Salary) AS SUM_Salary, AVG(EMPLOYEE.Salary) AS AVE_salary FROM DEPARTMENT

INNER JOIN EMPLOYEE

ON DEPARTMENT.Dnumber = EMPLOYEE.Dno GROUP BY DEPARTMENT.Dnumber,DEPARTMENT.Dname;

RETURN;

END;

Screenshot:

2. Write a Stored Procedure SP_New_Total_Salary_By_Dept using(by

calling) the Table Function TF_Total_Salary_By_Dept that you created in

1.

USE [Company]

GO DROP PROCEDURE SP_New_Total_Salary_By_Dept

GO

CREATE PROCEDURE SP_New_Total_Salary_By_Dept AS

CREATE TABLE NEWTab_TotalSalaryByDept

(

Dept_No INT, Dept_Name VarChar(30),

COUNT_Emp INT,

SUM_Salary INT, AVE_Salary INT,

New_SUM_Salary INT,

New_Ave_Salary INT )

IF EXISTS(SELECT * FROM TF_Total_Salary_By_Dept()) BEGIN

DECLARE @Dept_No INT,

@Dept_Name VarChar(30),

@COUNT_Emp INT, @SUM_Salary INT,

@AVE_Salary INT,

@New_SUM_Salary INT, @New_AVE_Salary INT

DECLARE SalaryDept CURSOR

LOCAL SCROLL STATIC

FOR

SELECT * FROM TF_Total_Salary_By_Dept() tf

OPEN SalaryDept

FETCH NEXT FROM SalaryDept INTO @Dept_No, @Dept_Name, @COUNT_Emp, @SUM_Salary, @AVE_Salary

WHILE @@FETCH_STATUS = 0

BEGIN --Rise by 10%

if(@Dept_No = 1)

BEGIN SELECT @New_SUM_Salary = @SUM_Salary + (0.1 *

@SUM_Salary)

SELECT @New_AVE_Salary =

@New_SUM_Salary/@COUNT_Emp END

--Rise by 20%

else if(@Dept_No = 4) BEGIN

SELECT @New_SUM_Salary = @SUM_Salary + (0.2 *

@SUM_Salary) SELECT @New_AVE_Salary =

@New_SUM_Salary/@COUNT_Emp

END

--Rise by 30% else if(@Dept_No = 5)

BEGIN

SELECT @New_SUM_Salary = @SUM_Salary + (0.3 * @SUM_Salary)

SELECT @New_AVE_Salary =

@New_SUM_Salary/@COUNT_Emp

END --Rise by 40%

else if(@Dept_No = 7)

BEGIN SELECT @New_SUM_Salary = @SUM_Salary + (0.4 *

@SUM_Salary)

SELECT @New_AVE_Salary = @New_SUM_Salary/@COUNT_Emp

END

INSERT INTO NEWTab_TotalSalaryByDept

VALUES(@Dept_No,@Dept_Name,@COUNT_Emp,@SUM_Salary,@AVE_Salary,@New_SUM_Sala

ry,@New_AVE_Salary)

FETCH NEXT FROM SalaryDept INTO @Dept_No, @Dept_Name, @COUNT_Emp, @SUM_Salary, @AVE_Salary

END

END GO

Screenshots:

Output: