Select Statement Help:How Do I Query Two Tables

Mar 20, 2006

How do I Query two tables and minus the result to be displayed in a gridview.  I will appreciate all the help that I can get in this regard. Find below my two select statement

1st Select Statement
Dim SelectString As String = "SELECT DISTINCT [Course_Code], [Course_Description], [Credit_Hr], [Course_Type], [Course_Method] FROM [MSISCourses] WHERE (([Course_Type] = Core) OR ([Course_Type] = Information Integration Project) "
If radBtnView.Checked = True Then
SelectString = SelectString & " OR ([Course_Type] = 'Knowledge')"
End If
If chkGView.Checked = True Then
SelectString = SelectString & " OR ([Specialization] = 'Data Management')"
End If
If chkGView2.Checked = True Then
SelectString = SelectString & " OR ([Specialization] = 'General')"
End If
If chkGView1.Checked = True Then
SelectString = SelectString & " OR ([Specialization] = 'Electronic Commerce')"
End If
If chkGView3.Checked = True Then
SelectString = SelectString & " OR ([Specialization] = 'Network Administration and Security')"
End If
If chkGView4.Checked = True Then
SelectString = SelectString & " OR ([Specialization] = 'Healthcare Information Systems')"
End If
SqlDataSource3.SelectCommand = SelectString

2nd Select Statement
"SELECT DISTINCT [Co_Code], [Co_Description], [Cr_Hr], [Co_Type], [Co_Method] FROM [StudentCourses] WHERE ([Co_Code] = StdIDLabel)"

my gridview
<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" DataKeyNames="Course_Code" DataSourceID="SqlDataSource3" GridLines="Horizontal"><Columns><asp:BoundField DataField="Course_Code" HeaderText="Course_Code" ReadOnly="True" SortExpression="Course_Code" /> <asp:BoundField DataField="Course_Description" HeaderText="Course_Description" SortExpression="Course_Description" /> <asp:BoundField DataField="Credit_Hr" HeaderText="Credit_Hr" SortExpression="Credit_Hr" /> <asp:BoundField DataField="Course_Type" HeaderText="Course_Type" SortExpression="Course_Type" /> <asp:BoundField DataField="Course_Method" HeaderText="Course_Method" SortExpression="Course_Method" /> </Columns>
</asp:GridView>

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Hi folks,

Hope you are all well.

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------------- ---------------- ---------------- ----------------
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------------- ---------------- ---------------- ----------------
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Code Snippet



SELECT Criminal.CriminalID, Criminal.Firstname, Criminal.Lastname, Criminal.Nickname, Criminal.Gender, Criminal.DOB, Criminal.Eyes, Criminal.Complexion, Criminal.Weight, Criminal.Height, Criminal.Build, Criminal.Scars, Criminal.Occupation, Criminal.CrimeOrgID, Criminal.IQ, Criminal.Hideout, Criminal.CriminalType, Max(CrimeComitted.Date) AS Last_Crime_Comitted
FROM Criminal INNER JOIN CrimeComitted ON Criminal.CriminalID=CrimeComitted.CriminalID
GROUP BY Criminal.CriminalID, Criminal.Firstname, Criminal.Lastname, Criminal.Nickname, Criminal.Gender, Criminal.DOB, Criminal.Eyes, Criminal.Complexion, Criminal.Weight, Criminal.Height, Criminal.Build, Criminal.Scars, Criminal.Occupation, Criminal.CrimeOrgID, Criminal.IQ, Criminal.Hideout, Criminal.CriminalType;







This query works fine for obtaining the Criminal table data, but once i've include CrimeCommitted.Country in the SELECT statement, the data returned contained all the crimes committed by each criminal (i just need the latest crime).



The query doesn't work when another table, other than Criminal, is selected. How can i obtain the columns in the CrimeCommitted table in this query?

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