ADO.NET :: Sum Of Two Columns In The Same Table
Mar 14, 2011i have atable that contains (id, name, commission) i need to have the sum of commission where name=a as'first' and the sum where name=b as 'second' in the same row
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[Code]....
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<table>
<colgroup span="1" width="20%"/>
<colgroup span="1" width="30%"/>
<colgroup span="1" width="20%"/>
<colgroup span="1" width="30%"/>
<tr>
<td colspan="3">
question data.......
</td>
<td colspan="1">
Answer data......
</td>
</tr>
<tr>
<td colspan="2">
question data.......
</td>
<td colspan="2">
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This layout should work fine with first row columns should have width of 70 and 30% resp
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Index Columns Primary Unique Clustered ign.Dup.Keys Unique Key
------------------------------------------------------------------------------------------
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Oct 24, 2010I have an SQL table called tbl, im trying to add the columns A, B and C to it.
When i execute the command :
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conn.Open(); cmd.ExecuteNonQuery();
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the command im writting for adding multiple columns is the following:
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Mar 5, 2011On one of our tables, a default clustered index is defined on the primary key by sql server 2005. The table also contains forign key columns and has got over 2 million rows. There are very frequent INSERT, UPDATE and DELETE functions on this table. Recently some of the SELECT queries which primary operate on the forign keys have become very slow (resulting in application timeout). To fix the problem, I defined an index on one of the primary keys which gave me very quick results. I don't know much about indexes.
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2. What performance impact does it have on the rest of the system? Is it going to break something else?
3. I read about fill factor. What is this and how does it effect the system?
4. Is the new index physically going to make any changes?
5. In case I delete this index later on, will the database return to the existing state or it will be a different state from now?
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Apr 2, 2010I have created a table in my SQL database that has a primary column (Title) and another column named Callsign. How can I access the table row that has a certain title and Callsign using C# in a web page event handler?
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