How Do I get value from sql search based on the start and end dates? - sql

Question

I have a Personnel Roles Table where employees are assigned daily roles or roles with specific start and end dates.
Managers have asked for a sort of manpower plan table which lists an employee’s daily role and this how I generate the table
private string CreateHTMLTable(Int32 month)
{
StringBuilder strBuilder = new StringBuilder();
System.Data.DataTable dtAllStaff = new System.Data.DataTable();
//get all staff
PersonelApplication.Classes.PersonelClass PersonnelClass = new PersonelClass();
dtAllStaff = PersonnelClass.GetAllPersonel();
//create manpower data table
System.Data.DataTable dtManPowerDataTable = new System.Data.DataTable();
//create montlhy dt
//get number of days in month
int daysInMonth = DateTime.DaysInMonth(DateTime.Now.Year, month);
//get first day in month
DateTime firstDayInMonth = new DateTime(DateTime.Now.Year, month, 1);
//get last day in month
DateTime lastDayInMonth = new DateTime();
lastDayInMonth = firstDayInMonth.AddMonths(1).AddDays(-1);
//start table
strBuilder.Append("<table>");
//create header based on number of days in the month
//append tr strat
strBuilder.Append("<tr>");
//add name header for personnle
strBuilder.Append("<th>");
strBuilder.Append("Staff");
strBuilder.Append("</th>");
for (int i = 1; i <= lastDayInMonth.Day; i++)
{
strBuilder.Append("<th>");
strBuilder.Append(i.ToString() + "/" + month.ToString());
strBuilder.Append("</th>");
}
//append tr end to header row
strBuilder.Append("</tr>");
System.Data.SqlClient.SqlConnection sqlConn = new System.Data.SqlClient.SqlConnection();
sqlConn.ConnectionString = ConnectionClass.CreateConnection.getConnectionString();
using (sqlConn = ConnectionClass.CreateConnection.publicGetConn())
{
sqlConn.ConnectionString = ConnectionClass.CreateConnection.getConnectionString();
try
{
sqlConn.Open();
if (sqlConn.State == ConnectionState.Open)
{
foreach (DataRow row in dtAllStaff.Rows)
{
string personnelName = "";
string personnelCode = "";
Int32 personnelID = 0; ;
personnelCode = row[1].ToString();
strBuilder.Append("<tr>");
strBuilder.Append("<td>");
strBuilder.Append(personnelCode);
strBuilder.Append("</td>");
for (int i = 1; i <= lastDayInMonth.Day; i++)
{
//here get the each employee's planned role as well
//as actual role
}
strBuilder.Append("</tr>");
}
}
}
catch (Exception ex)
{
//pouplate later
}
finally
{
}
}
//end table
strBuilder.Append("</table>");
return strBuilder.ToString();
}
My issue is the SQL function which will return the employees role for a particular day.
--actual end date for this role is '08-18-2012'
declare #sdate date
set #sdate= '08-14-2012'
SELECT
CONVERT(date,startdate,101)
,CONVERT(date,EndDate,101)
,StartDate
,EndDate
,fk_PersonelID
,fk_RoleID
FROM [dbo].JobRolesTable
where #sdate between StartDate and EndDate
and fk_PersonelID = 40
But If I do a search for the next day which is the '08-15-2012’,I get nada
Bascially I want to return an employee’s role on any day of the month and ‘na’ if there’s none
I don’t want to use a cursor for this but is there another way I can achieve this

Answer 1

DECLARE #sdate DATE = '20120814';
SELECT
CONVERT(DATE,StartDate,101) -- what is the purpose of 101 here?
,CONVERT(DATE,EndDate,101) -- what is the purpose of 101 here?
,StartDate
,EndDate
,fk_PersonelID
,fk_RoleID
FROM [dbo].JobRolesTable
WHERE #sdate >= StartDate
AND #sdate < DATEADD(DAY, 1, EndDate)
AND fk_PersonelID = 40;

Answer 2

You are probably populating your parameters incorrectly.
If your query is of the form
SELECT *
FROM Table
WHERE (#SearchDate BETWEEN #StartDate AND #EndDate) AND Id=#Id
(which yours appears to be), then it will return the correct values from the db as long as the dates are being specified correctly.
Can you show the code where you're actually attempting to use the SqlConnection that you're opening in the posted code?