Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Append a table from the rows returned by a SQL Statement

Posted on 2013-11-01
6
303 Views
Last Modified: 2013-11-08
A SQL statement returns rows and columns.  This works well.

I need to append a table from the returned rows.

Currently I am using SQLDataReader to read column values into a dataset.
Then I am parsing the dataset one row at a time and building an array.

Then I am parsing the array one row at a time and appending the values to a table.

What do I need to do to Append a table from the rows returned by a SQL Statement.
The appended table can be a table that has been cleared. Then all rows might be appended in a single statement instead of building and parsing a dataset.  

//SQL statement returns rows and columns.
  SqlCommand cmdShowGrid = new SqlCommand("usp_getExceptions", conStockSelect);
            cmdShowGrid.Connection = conStockSelect;
            cmdShowGrid.CommandType = System.Data.CommandType.StoredProcedure;
            cmdShowGrid.CommandTimeout = 1200;
            cmdShowGrid.CommandText = "usp_getExceptions";
            cmdShowGrid.Parameters.Clear();
            // cmdShowGrid.Parameters.AddWithValue("@MarketID", SqlDbType.Int).Value = 2;
            cmdShowGrid.Parameters.AddWithValue("@CurrFromDate", SqlDbType.Date).Value = dteSampleBCStart;
            cmdShowGrid.Parameters.AddWithValue("@CurrToDate", SqlDbType.Date).Value = dteSampleABStart;
            cmdShowGrid.Parameters.AddWithValue("@PrevFromDate", SqlDbType.Date).Value = dteSampleABEnd;
            cmdShowGrid.Parameters.AddWithValue("@PrevToDate", SqlDbType.Date).Value = dteSampleBCEnd;
            cmdShowGrid.Parameters.AddWithValue("@Min5DayAvg", SqlDbType.Decimal).Value = 1.00;
            cmdShowGrid.Parameters.AddWithValue("@Max5DayAvg", SqlDbType.Decimal).Value = 100.00;
            cmdShowGrid.Parameters.AddWithValue("@Curr5Prev8Min", SqlDbType.Decimal).Value = 1.05;
            cmdShowGrid.Parameters.AddWithValue("@Curr5Prev8Max", SqlDbType.Decimal).Value = lstMaxCurr5Prev8.SelectedValue; //Decimal.Add(decIncreases, decIncreasesPlus);
 
//using SQLDataReader to read column values into a dataset.
          SqlDataAdapter adpExceptions = new SqlDataAdapter(cmdShowGrid);
            DataSet dstExceptions = new DataSet();
            adpExceptions.Fill(dstExceptions, "Exceptions");

            SqlDataReader rdrStockHist;

            rdrStockHist = cmdShowGrid.ExecuteReader();

            double[,] dblArrException = new double[2000, 8];  // Numerical parameter values
            string[,] strArrException = new string[2000, 2];  // String parameter values

//Parsing the dataset one row at a time and building an array.
          if (rdrStockHist.HasRows)   // Build the array
            {
                while (rdrStockHist.Read())
                {
                    // Read the col values into arrays
                    dblArrException[intRow, 0] = Convert.ToDouble(rdrStockHist["SymbolID"]);
                    dblArrException[intRow, 1] = Convert.ToDouble(rdrStockHist["Curr5DayAvg"]);
                    dblArrException[intRow, 2] = Convert.ToDouble(rdrStockHist["Prev8DayAvg"]);
                    //dblArrException[intRow, 3] = Convert.ToDouble(rdrStockHist["PctChg"]);
                    //dblArrException[intRow,4]  = Convert.ToDouble(rdrStockHist["MarketID"]);
                    //dblArrException[intRow, 5] = 0;  Convert.ToDouble(rdrStockHist["PctUp"]);

                    //strArrException[intRow,0]  = rdrStockHist["SymbolName"].ToString();
                    //strArrException[intRow,1]  = rdrStockHist["SiteURL"].ToString();

                    intRow++;
                }
            }  // End (rdrSymbols.Read())

            rdrStockHist.Close(); // closing SqlDataReader

//Parsing the array one row at a time and appending the values to a table.

                SqlCommand cmdapdExceptions = new SqlCommand("usp_apdExceptions", conStockSelect);
                cmdapdExceptions.CommandType = System.Data.CommandType.StoredProcedure;
                cmdapdExceptions.CommandTimeout = 1200;

                for (int i = 0; i < intRow; i++)
                {
                    cmdapdExceptions.Parameters.Clear();
                    cmdapdExceptions.Parameters.Add("@SymbolID", SqlDbType.Int).Value = dblArrException[i, 0];
                    cmdapdExceptions.Parameters.Add("@Curr5DayAvg", SqlDbType.Float).Value = dblArrException[i, 1];
                    cmdapdExceptions.Parameters.Add("@Prev8DayAvg", SqlDbType.Float).Value = dblArrException[i, 2];


                    RunProcedure(cmdapdExceptions, "usp_apdExceptions");
                }  // End  for (int i = 0; i < intRow; i++)

                cmdapdExceptions.Dispose();
0
Comment
Question by:Dovberman
  • 3
  • 2
6 Comments
 
LVL 40

Accepted Solution

by:
Sharath earned 250 total points
ID: 39616924
Do you have both the tables on same server? You can append the rows with one INSERT statement like

INSERT TableB
SELECT * FROM TableA
0
 
LVL 15

Assisted Solution

by:gplana
gplana earned 250 total points
ID: 39616926
If you just want to insert values from a SELECT into your table, you should just make a INSERT SELECT:

INSERT INTO your_table (field1, field2, ..., fieldN) SELECT field1, field2, ...., field N FROM another_table....)

Just understand that the fields of the SELECT should be of the same datatype of the field lisf of the INSERT.

Hope it helps.
0
 

Author Comment

by:Dovberman
ID: 39618028
Yes, both tables are on the same server, and datatypes match.

Thanks

I will try this and give feedback tomorrow.


INSERT INTO TargetTableName (field1, field2, ..., fieldN)
SELECT  
 w.UserName
, w.SymbolID
, @FromDate AS FromDate
, @ToDate AS ToDate
, (SELECT SymbolName FROM Symbol WHERE SymbolID = w.SymbolID) AS SymbolName
, (SELECT SUBSTRING(SecName, 1, 20) FROM Symbol WHERE SymbolID = w.SymbolID) AS SecName
, w.MarketID
, (SELECT MarketName FROM Market
      WHERE MarketID = w.MarketID)
      AS MarketName
, w.WatchListID
, w.PickDate
, @ResearchSiteURL AS SiteURL

, @SiteEvalType AS SiteEvalType      

, (SELECT Count(*) FROM DownLoadDates
  WHERE QuoteDate >=(w.PickDate +1 ) AND MarketID = 1) As DaysOnList

, (SELECT PickDatePrice FROM WatchList
      WHERE PickDate=w.PickDate    
      AND SymbolID=w.SymbolID)
      AS PickPrice    

,  (SELECT ClosePrice FROM StockHist
      WHERE QuoteDate=@FromDate  
      AND SymbolID=w.SymbolID)
      AS BasePrice

,  (SELECT COUNT(*) FROM StockHist
      WHERE ClosePrice > ClosePricePrev
      AND QuoteDate BETWEEN w.PickDate AND @AsOfDate  
      AND  SymbolID=w.SymbolID )
      AS PriceUpCount
     
      --Pricechange
     
  , (SELECT Top(1) ClosePrice FROM StockHist
      WHERE QuoteDate=@AsOfDate    
      AND SymbolID=w.SymbolID)
      -
       (SELECT ClosePrice FROM StockHist
      WHERE QuoteDate=@FromDate  
      AND SymbolID=w.SymbolID)
      AS PriceChange
     
 ,  (SELECT Top(1) ClosePrice FROM StockHist
      WHERE QuoteDate=@AsOfDate    
      AND SymbolID=w.SymbolID)
      AS CurrentPrice
     
 , (SELECT 2* STDEV(HighPrice-LowPrice)
      FROM StockHist WHERE SymbolID=w.SymbolID)
      AS CI95
 
  -- PctChange = ((CurrentPrice - BasePrice)/BasePrice) * 100
 
  -- Fix -- PctChange = ((CurrentPrice - PickPrice)/PickPrice) * 100
     
   ,( ( (SELECT Top(1) ClosePrice FROM StockHist
      WHERE QuoteDate=@AsOfDate    
      AND SymbolID=w.SymbolID)
     
      -
       (SELECT ClosePrice FROM StockHist
      WHERE QuoteDate=@FromDate  
      AND SymbolID=w.SymbolID) )
     
      /
     
         (SELECT ClosePrice FROM StockHist
      WHERE QuoteDate=@FromDate  
      AND SymbolID=w.SymbolID) ) * 100
     
      AS PctChange
     
FROM Watchlist w
WHERE w.UserID='0A742A71-B5D5-4E00-9E5F-BD3C82B5936A'
0
The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

 
LVL 40

Expert Comment

by:Sharath
ID: 39618051
I think your INSERT query can  be optimized. The StockHist table is queried many times. let me know.
0
 

Author Comment

by:Dovberman
ID: 39619727
Yes, the StockHist table is queried many times.

How can this be optimized?

Thanks,
0
 

Author Closing Comment

by:Dovberman
ID: 39633554
That worked.

Thanks
0

Featured Post

Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In this article I will describe the Copy Database Wizard method as one possible migration process and I will add the extra tasks needed for an upgrade when and where is applied so it will cover all.
Entering time in Microsoft Access can be difficult. An input mask often bothers users more than helping them and won't catch all typing errors. This article shows how to create a textbox for 24-hour time input with full validation politely catching …
This video shows, step by step, how to configure Oracle Heterogeneous Services via the Generic Gateway Agent in order to make a connection from an Oracle session and access a remote SQL Server database table.
Using examples as well as descriptions, and references to Books Online, show the documentation available for date manipulation functions and by using a select few of these functions, show how date based data can be manipulated with these functions.

792 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question