Why distinct() is not working in my sqldatasource? - sql

Question

enter image description hereI want to display timetable to faculty i.e they will have different batch allocated to them with same date but i want to display in single grid view.I have tried with distinct but its not working.They will have first hour and second hour with different batch and i want to display there subject and batch in single column but its showing in two column in single grid view. please help me out from these problem
<label>From Date</label>
<asp:TextBox ID="fromdate" runat="server" TextMode="Date"></asp:TextBox>
<label>To Date</label>
<asp:TextBox ID="todate" runat="server" TextMode="Date"></asp:TextBox>
<asp:Button ID="viewid" runat="server" OnClick="viewid_Click" Text="View" CssClass="button2"/>
<asp:GridView ID="Viewsubjects" runat="server" AutoGenerateColumns="False" DataSourceID="batch1" CssClass="mGrid1">
<Columns>
<asp:BoundField DataField="datedif" HeaderText="datedif" SortExpression="datedif" />
<asp:TemplateField HeaderText="Hour1" SortExpression="subject1">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Visible='<%# Eval("subject1")!=DBNull.Value ? true:false %>' Text='<%#"Subject:"+Eval("subject1")%>'></asp:Label>
<br />
<asp:Label ID="label6" runat="server" Visible='<%# (Eval("batch")!=DBNull.Value && Eval("subject1")!=DBNull.Value) ? true:false %>' Text='<%#"Batch:"+Eval("batch")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Hour2" SortExpression="subject2">
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Visible='<%# Eval("subject2")!=DBNull.Value ? true:false %>' Text='<%#"Subject:"+Eval("subject2")%>'></asp:Label>
<br />
<asp:Label ID="label7" runat="server" Visible='<%# (Eval("batch")!=DBNull.Value && Eval("subject2")!=DBNull.Value) ? true:false %>' Text='<%#"Batch:"+Eval("batch")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Hour3" SortExpression="subject3">
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Visible='<%# Eval("subject3")!=DBNull.Value ? true:false %>' Text='<%#"Subject:"+Eval("subject3")%>'></asp:Label>
<br />
<asp:Label ID="label8" runat="server" Visible='<%# (Eval("batch")!=DBNull.Value && Eval("subject3")!=DBNull.Value) ? true:false %>' Text='<%#"Batch:"+Eval("batch")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Hour4" SortExpression="subject4">
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Visible='<%# Eval("subject4")!=DBNull.Value ? true:false %>' Text='<%#"Subject:"+Eval("subject4")%>'></asp:Label>
<br />
<asp:Label ID="label9" runat="server" Visible='<%# (Eval("batch")!=DBNull.Value && Eval("subject4")!=DBNull.Value) ? true:false %>' Text='<%#"Batch:"+Eval("batch")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Hour5" SortExpression="subject5">
<ItemTemplate>
<asp:Label ID="Label5" runat="server" Visible='<%# Eval("subject5")!=DBNull.Value ? true:false %>' Text='<%#"Subject:"+Eval("subject5")%>'></asp:Label>
<br />
<asp:Label ID="label10" runat="server" Visible='<%# (Eval("batch")!=DBNull.Value && Eval("subject5")!=DBNull.Value) ? true:false %>' Text='<%#"Batch:"+Eval("batch")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="batch1" runat="server"
ConnectionString="<%$ ConnectionStrings:Database1ConnectionString1 %>"
SelectCommand="SELECT DISTINCT [datedif], [subject1], [subject2], [subject3], [subject4], [subject5],[batch] FROM [test] WHERE ([datedif] >= #datedif)">
<SelectParameters>
<asp:ControlParameter ControlID="fromdate" Name="datedif" PropertyName="Text" Type="String" />
</SelectParameters>
</asp:SqlDataSource>
These is how am getting the output

Answer 1

Try these queries given below-
create table timetable1(date date,hour1 int,subject1 varchar(255),batch1 varchar(20),hour2 int,subject2 varchar(255),batch2 varchar(20),hour3 int,subject3 varchar(255),batch3 varchar(20),faculty varchar(255));
insert into timetable1 values(cast(getdate() as date), 1, 'subject1','B1',0, 's2','b2',3,'s3','b3','ms. hart');
insert into timetable1 values(cast(getdate() as date), 1, 'subject12','B12',0, 's12','b12',3,'s13','b13','ms. hart11');
insert into timetable1 values(cast(getdate() as date), 1, 'subject13','B122',0, 's222','b222',3,'s23','b23','ms. hart22');
select date,(subject1+' '+batch1) as hour1, (subject2+' '+batch2) as hour2,(subject3+' '+batch3) as hour3,faculty from timetable1group by date, faculty,subject1,subject2,subject3,batch1,batch2,batch3

Answer 2

What you're getting IS actually distinct, because each row has different values. What you're looking for is a "group by", which will group your values by day and faculty. My solution is based on replacing your current solution of:
date hour1 subject1 hour2 subject2 hour3 subject3 faculty
2015-06-25 1 subject 1 0 (null) 0 (null) ms. hart
2015-06-25 0 (null) 1 subject 2 0 (null) ms. hart
2015-06-25 0 (null) 0 (null) 1 subject 3 ms. hart
with:
date hour1 hour2 hour3 faculty
|----------|----------|-----------|-----------|----------|
2015-06-25 subject 1 subject 3 subject 3 ms. hart
If this is assumption is correct, then here is the query I used (I created my own tables because you did not provide DDL but if you have issues let me know)
select date,max(subject1) hour1, max(subject3) hour2, max(subject3) hour3, faculty from timetable
group by date, faculty
And here is the sql fiddle for you to experiment :)
http://sqlfiddle.com/#!6/c1850/3