NULL Values Returned When Reading Values From A Text File Using Data Reader.

Feb 23, 2007

I have a DTSX package which reads values from a fixed-length text file using a data reader and writes some of the column values from the file to an Oracle table. We have used this DTSX several times without incident but recently the process started inserting NULL values for some of the columns when there was a valid value in the source file. If we extract some of the rows from the source file into a smaller file (i.e 10 rows which incorrectly returned NULLs) and run them through the same package they write the correct values to the table, but running the complete file again results in the NULL values error. As well, if we rerun the same file multiple times the incidence of NULL values varies slightly and does not always seem to impact the same rows. I tried outputting data to a log file to see if I can determine what happens and no error messages are returned but it seems to be the case that the NULL values occur after pulling in the data via a Data Reader. Has anyone seen anything like this before or does anyone have a suggestion on how to try and get some additional debugging information around this error?

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Reading Default Values Instead Of NULL From A Flat File

Oct 22, 2007

Hi,

I have the following problem: I'm connected to flat file source and trying to read data that is later inserted in an MS Access database. Everything wokrs fine instead of one thing - when I have null values in the flat file, I want those NULL values to be inserted in the MS Access db, instead of that what happens is that I actually get the default values for a column type from the flat file and later insert that defalut value. For example if I have a null value in an four-bite-signed-integer column of the flat file, I get 0 as value.

I thouth of solution using a "Derived Column" transformation which can transform the zeros into nulls, but decided to check with you guys if there is a smarter thing to do (for example to edit the flat file source to read the NULLs correctly).

Any advice is appreciated! Many thanks

Ventsy

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May 8, 2009

I'm using SSIS 2005 Enterprise edition,  I'm creating a package that reads an excel (xls) file using the "excel source" component, and it dumps the data into an OLEDB destination (a sql server). When I drag the excel source component and create the excel connection to my file the component automatically reads the columns and their datatypes.

The problem is that I have a column which has numeric data and the package uploads as NULL every number that starts with a zero. (note: in excel this column is formatted as "text", despite it has only numbers, because it's the only way excel maintains the left sided zeros).

So I checked the data types by right clicking the excel source component -> show advanced editor and my surprise is that this column's data type is detected as double-precision float, and it doesn't let me change it. URL... but it only works when the first row of data has a number beginning with zero on this column. How to get the data imported correctly?

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Nov 10, 2000

I am trying to use a stored procedure inside the scripter in a site server pipeline. Can anyone tell me how the scripter will read the the result which is a variable. The stored procedure is returning the right value when run in query analyzer but I don't know how to retrieve it inside the pipeline.

Thank you
JG

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Having Rows With Some Null Values Returned Conditionally

Aug 8, 2012

This should be a simple solution, but it has been a long time since I've done any query writing (mostly in Oracle) and I am stumped, so here goes:

We are in the process of converting Access database to MSSQL with web form front ends.

I have a table, all columns are nullable, and want users to be able to query from a form, which has a field for each column and defaults to a % wild card for the entered value.

I want the users to be able to put any string in any field, and have it return each row that matches that, including rows with null values in the other columns, but not the column with the entered criteria.

Here is a sample of the data:

Code:
SQL> select * from test;

COL1 COL2 COL3 COL4
----- ----- ----- -----
this is a test
this is not test
this is not
this is test too
is test too
is too
is too

7 rows selected.

Now, if I have this SQL run, it will return only rows that have no nulls in any columns:

Code:
select
col1,
col2,
col3,
col4from test
where
col1 like'th%'
and col2 like '%'
and col3 like '%'
and col4 like '%';

COL1 COL2 COL3 COL4
----- ----- ----- -----
this is a test
this is not test
this is test too

Now, if I use an OR clause for each column, this mostly works, but the trouble is it will also return rows with null values for the field that has criteria entered in it:

Code:
select
col1,
col2,
col3,
col4from test
where
(col1 like'th%' OR col1 is null)
and (col2 like '%' OR col2 is null)
and (col3 like '%' OR col3 is null)
and (col4 like '%' OR col4 is null);
COL1 COL2 COL3 COL4
----- ----- ----- -----
this is a test
this is not test
this is not
this is test too
is test too
is too
is too

The idea is to only select the first 4 rows in the above example.

I was playing with ISNULL in the select clause, but all it does is substitute a string for a null, and I think CASE will do the same thing.

Is there a way I can write this query so it will return rows with NULL values in any column, except the one(column) that has user entered criteria in it?

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Null Values When Extracting Data From An Excel File

Oct 18, 2006

Hello,

I'm trying to import some data from a spreadsheet to a database table from a package in integration services. The problem is that I see the data when I open the excel file but when I try to run my package , it doesn't insert any rows in the table and it finishes with a success status.

My excel file has some formulas to get the data from other worksheets. I added a Data Viewer and all I see is null values in every cell.

I need help...does anyone know what's wrong?

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Jan 25, 2008

I have a pivot transform that pivots a batch type. After the pivot, each batch type has its own row with null values for the other batch types that were pivoted. I want to group two fields and max() the remaining batch types so that the multiple rows are displayed on one row. I tried using the aggregate transform, but since the batch type field is a string, the max() function fails in the package. Is there another transform or can I use the aggragate transform another way so that the max() will work on a string?

-- Ryan

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May 27, 2014

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When I am trying to load files into database it's throwing me error when there is no values in text qualifier.

For Example. "Others","0","0"," "," "

If I have the value above in raw files. SSIS Package throwing me error in " " this column.

Saying Data Conversion failed.

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Nov 19, 2007

I am using a Excel Source to get the data from an excel file to sql server 2005 table. A couple columns are coming in a double precision float, but some values have characters in them, but those values are coming out as null, even though I changed the datatype from float to unicode string. Any inputs on resolving this will be much appreciated.

Thanks,
Manisha

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Jul 17, 2013

I have a subselect that should be working but doesn't. Been at it too long today.

DECLARE @Calendar1 AS DateTime
SET @Calendar1 = '{{{ Please choose a start date. }}}'
SELECT
('0' + CONVERT (varchar (10), W.WorkerID)) AS VendorID,
(W.FirstName + ' ' + W.LastName) AS VendorName,
(W.FirstName + ' ' + W.LastName) AS Contact,

[code].....

Where did I go wrong?

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I have SQL Server 2012 SSIS. I have Excel source and OLE DB Destination.I have problem with importing CustomerSales column.CustomerSales values like 1000.00,2000.10,3000.30,NotAvailable.So I have decimal values and nvarchar mixed in on Excel column. This is requirement for solution.However SSIS reads only numeric values correctly and nvarchar values are set as Null. Why?

CREATE TABLE [dbo].[Import_CustomerSales](
 [CustomerId] [nvarchar](50) NULL,
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 [CustomerSales] [nvarchar](50) NULL
) ON [PRIMARY]

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Mar 29, 2006

Hi

can somebody explain me how I can assign a NULL value to a datetime type field in the script transformation editor in a data flow task.
In the script hereunder, Row.Datum1_IsNull is true, but still Row.OutputDatum1 will be assigned a value '0001-01-01' which generates an error (not a valid datetime). All alternatives known to me (CDate("") or Convert.ToDateTime("") or Convert.ToDateTime(System.DBNull.Value)) were not successful.
Leaving out the ELSE clause generates following error: Error: Year, Month, and Day parameters describe an un-representable DateTime.




If Not Row.Datum1_IsNull Then

Row.OutputDatum1 = Row.Datum1

Else

Row.OutputDatum1 = CDate(System.Convert.DBNull)

End If



Any help welcome.

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May 19, 2008

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I know this won't be easy but its been worrying me for a long time. I have a method of importing the data into excel, but although difficult, it must be possible to get a system to get it into sql server. This must be a fairly common issue.

John

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Apr 10, 2008

Hi,

my configuration file provides parameters that are used for an SQL query in my package. However, for these parameters it must be possible to pass NULL to the query.

This seems to be impossible in SSIS..? If the config file provides no value, the package uses a default value - and this default value can not be null.

Any suggestions?

Thanks a lot,

Regards
Jan

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Jun 6, 2007

 Hi everyone I have a directory that contains a lot of text files that have data I need to draw from.  I want to know if it is possible to write a program that will read all of the text files in the directory and pull out data and save it to a new textfile. For example: Each text file is formatted this wayColumn1, Column2, Column3"1","xxxx","yyyy""2", "xxxx", "yyyy""3", "XXXX", "yyyy" I want to put all lines that begin with 1 in one text file, all the lines that begin with two in another text file, and the same with all lines that begin with 3. my problem is I want to be able to point at the folder that contains those files and have it read every text file in the folder and perform the operation.  If this is possible can someone point me in the right direction on how to get started.Thank you for any help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 

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Sep 1, 1999

Hi,

How would I be able to query a table (ie. all people with last name 'Smith'), have that set of data outputted to a regular text file (in a formatted way)

And what's the best way to manipulate that set of data to let's say update a Yes/No field in that table to mark that that those individuals('Smith') which were outputted in that text file?

What about the reverse? If I got a regular text file with Last Name, Social Security(delimited by tab), etc is there a way I can get SQL Server to read that text file and make an update to the database based on the Social security in that text file.

Any help would be immensely appreciated!
Angel

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Nov 9, 2000

Hi,

My query "select blah, blah, rank from tablewithscores" will return results that can legitimately hold nulls in the rank column. I want to order on the rank column, but those nulls should appear at the bottom of the list

e.g.

Rank Blah Blah
1 - -
2 - -
3 - -
NULL - -
NULL - -

At present the NULLs are at the top of the list, but I do not want my ranking in descending order. Any suggestions?

Thanks
Dan

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Feb 20, 2008

Hello,
I have a datareader and whenever the value that it is suppose to display in the Label is empty because there is no Data Entered Yet I gives me and error and I have the event set ONLOAD so the page with no data to disply does not load.
So the Ranking.text = a select statement i have, but when I dont have any data into the SQL database there is nothing to SELECT so the program gives of an error.
Can someone help me with this. Thank you.
Here is the code: Dim objReader As SqlDataReader
conn.Open()
objReader = comm.ExecuteReader()
objReader.Read()lblRanking.Text = objReader("Rating")
objReader.Close()

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Reading Data Using Data Reader With Sql Server 2005 Conn

May 3, 2007

Hi  I have written a piece of code for Login form which reads the user id and password from db. It works fine with the Sql server 2000 but I get a error with Sql server 2005.   SqlConnection conn = new SqlConnection("Data Source=D\SQLEXPRESS;Initial Catalog=model;Integrated Security=True");        SqlCommand cmd = new SqlCommand("Select * from JsLoginDetails", conn);        conn.Open();        SqlDataReader dr = cmd.ExecuteReader();                                  while (dr.Read())        {            if ((Login1.UserName == dr.GetValue(0).ToString()) && Login1.Password == dr.GetValue(1).ToString())            {                Response.Redirect("MainJs.aspx");            }            else            {                Login1.FailureText = "Invalid Userid Or Password";            }        }        dr.Dispose();        conn.Close();    } I get and error Invalid object name 'JsLoginDetails'.  pls help thnksdiv 

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Loosing Values When Load From Text File

Apr 11, 2006

When loading a table in a data flow from a text file that contains non-null float values, I am seeing erratic and inconsistent results.  I am presently using SQL Server Destination in a data flow.

- With low volumnes of data, less that 50,000 rows, no problems

- But with higher volumnes, 2,000,000+ rows, I get different results depending on how I run the package.  If I run is directly (right-click and click on Execute), I get the expected result. 

But if I use SQL Server Agent to run the package, half of the values are lost and nulls are loaded instead.  I have inspected the into text file and there are few rows with null for the column.

Any help would be appreciated!

Greg

 

 

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Sep 3, 2015

I have an SSIS package that imports data from an Excel file, replaces any value in Excel that reads "NULL" to "", then writes the data to a couple of databases.

What I have discovered today, is I have two columns of dates, an admit date and discharge date column, and what I need to do is anywhere I have a null value in the discharge date column, I have to replace it with the value in the admit date column. 

I have searched around online and tried a few things using the Replace funtion in Derived columns but no dice so far. 

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Compare Incoming Input File Row Values With Database Row Values In SSIS

Jan 23, 2008

Hi All,

I receive the input file with some 100 columns and some 20k+ rows and I want to check the incoming input row is existed in the database or not based on 2 key columns. If the row is existed then I need to check all the columns (nearly 100 columns) values in input and the database are equal or not. If both are equal I need to treat them seperately if not there is a seperate logic. How Can I do that check for each row and for each column?

Basically the algorithm is like this, if the input file row is not existed in the database then treat that as new row else if the input row is existed in the database then check all the columns are equal or not. If all the columns are equal then treat that as existing row and do nothing else if some columns are not equal then treat this row seperately.

I found some thing to achieve the above thing.
1. Take the input row and check in the database.
2. If the row is not found in the database then treat it as new row.
3. If row is found in the database then
a) Take the source row and prepare a concatenated string for all the columns
b) Take the database row and prepare a concatenated string for all the columns
c) Find out the hash code for the 2 strings and then compare hash codes for equal.

The disadvantage of this is running a loop 2*m*n times where m is the number of rows and n is the number of columns. It should be done 2 times for input file row and database row.

Can anybody suggest a good method to do this?

What does the function "GetHashCode" for InputBuffer in method "Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)" will do?
Will it generates hash code based on all the columns values?

Pls clarify.

Regards
Venkat.

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Checkbox Data-bound To A Bit SQL Field Can't Handle NULL Values

Jun 18, 2004

I have a checkbox on my webform that is bound to a bit field in my SQL table. I'm fine as long as I've got the bit field set to 0 or 1, but if the field is NULL, the checkbox throws an exception during the databind.

Is there any way to handle this without removing the data binding and manually setting the value (ie: some way to intercept it before the exception gets thrown and then setting the field value in the dataset)?

Thanks!

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Data Flow Task - Have Null Values Take Table Default

Jun 6, 2006

Hi,


I have a data transform from a flat-file to a SQL server database.
Some of the flat-file fields have NULL values. The SQL table I'm
importing into does not allow NULL values in any field, but each field
has a Default value specified.


I need to have it so that if a null value comes across in a field using
the data transform, it takes the table default on import. I could of
sworn I had this working a few days ago, but I get errors now that
state I'm violating table constraints. Has anyone done this before?


Thanks
Jeff

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Getting Null Values While Importing Data From Excel Sheet To Sqql Server

Aug 16, 2007

Hai Friends,
Actually i want to import excel sheet in to sql server tables. I am writing the following query                                                                                           SELECT * FROM OPENROWSET('Microsoft.Jet.OLEDB.4.0', 'Excel 8.0;Database=C:Book1.xls','SELECT * FROM [Sheet1$]') and able to retireve the data but the problem is the data present in the excel sheet is





Username
password

hello
12345

12345
hello

hai-123
haihai

haihello
hello-123
Once i run this query i am getting it as                                                                                                                                                              
Username Password                                                                                                                                                                                           hello NULLNULL hellohai-123 haihaihaihello hello-123can anybody please help me out in this case and how to solve this problem and if you have any piece of code please pass it on to me and i am in very urgent need waiting for your replies thanks in advance.

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Using Returned Values From One SP In Another

Jun 20, 2006

Hi all,

I have a SP that needs to return a record set based upon the values of calling another SP. The 2nd SP uses the output parameter and works fine. However, the resulting Insert doesnt see the value. I cannot for the life of me work out why not!

My other question is how do I stop the imbedded procedures from outputing a result? When the procedure is run in analyser it produces three sets of data. The first two being the outputs for the two SPs.

Any help would be much appreciated!

Code as follows:

CREATE PROCEDURE [dbo].[trl_GetOpenDurations] AS

--- CALLS the sp trl_CallOpenDuration with the following params
---1 min minute value - int
---2 max minute value - int
---3 return value - int - interval in minutes

set nocount on

declare @min int --- less than 1 min
declare @hour int --- more than 1 min, less than 1 hour

create table #t ([Type] VARCHAR(10) ,[Value] int)

EXECUTE trl_callOpenDuration 0,1,@min
insert into #t ([Type],[Value]) values ('<1Min', @min)

EXECUTE trl_callOpenDuration 1,60,@hour
insert into #t ([Type],[Value]) values ('<1Hour',@hour)
---get data from table
Select * from #t
GO


RESULTS:

<1Min NULL
<1Hour NULL

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Ambiguous Values Returned

May 15, 2008

Hello,

I'm brand new to this forum and I'm stuck. We've got a query which queries three tables: booking, catheter and patients. The following (dodgy) query has pulled off the data for years, without problems:


SELECT
CARDIAC_CATHETER.CARDIAC_CATHETER_ID,
CARDIAC_CATHETER.OPERATOR1,
CARDIAC_CATHETER.TEST_DATE,
BOOKING.STATUS,
BOOKING.TEST_DATE AS BOOKING_TEST_DATE,
BOOKING.PROCEDURE_DATE_TIME,
CARDIAC_CATHETER.ITEM_NO,
CARDIAC_CATHETER.BILLING_CATEGORY,
PATIENTS.REFERRING_PHYSICIAN1,
PATIENTS.HOSPITAL_UNIT_NUMBER
FROM
(CARDIAC_CATHETER INNER JOIN PATIENTS ON CARDIAC_CATHETER.PATIENT_ID = PATIENTS.PATIENT_ID)
LEFT OUTER JOIN BOOKING ON PATIENTS.PATIENT_ID = BOOKING.PATIENT_ID AND 'CATHETER' = BOOKING.CLINIC AND BOOKING.STATUS <> 'CANCELLED' AND BOOKING.PROCEDURE_DATE_TIME >= (CARDIAC_CATHETER.TEST_DATE - 1)
AND BOOKING.PROCEDURE_DATE_TIME < (CARDIAC_CATHETER.TEST_DATE + 1)
WHERE
CARDIAC_CATHETER.TEST_DATE > '2005-04-01' AND CARDIAC_CATHETER.BILLING_CATEGORY LIKE '3%'


About 2500 perfect rows and 12 rows which have duplicate catheter id values. There are six pairs of duplicated records. It's only the cardiac_catheter.catheter_id and cardiac_catheter.test_date which are duplicated - the first row shown below contains correct values, the second doens't. The other values returned, on both rows, are correct. Here is some sample data:

CARDIAC_CATHETER_ID
cat_id1234
cat_id1234

CARDIAC_CATHETER_TEST_DATE
19/12/2005 13:17
19/12/2005 13:17

BOOKING_TEST_DATE
19/12/2005 13:33
19/12/2005 08:46

PROCEDURE_DATE_TIME
20/12/2005 10:30
19/12/2005 08:46

CLINIC
CATHETER
CATHETER

I know the query is rubbish. Has anyone got any idea how it can be improved and sorted so that we don't pull back ambiguous data?

Thanks,

Stewart

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Jul 23, 2005

I have a table where inactive names are lower case and active names areuppercase. Note: Not my design.Anyways I want to select all names form this table where the name isuppercase. I see collate and ASCII pop up in searches but the examplesdon't seem usable in queries as much as they were for creating tablesand such.Thanks,Phil

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Mar 6, 2006

Can anyone tell me what the heck this is trying to tell me. I have 3 datasets I'm working with so there are errors for each here:

[rsMissingFieldInDataSet] The data set €˜Revenue_By_Client€™ contains a definition for the Field €˜Branch€™. This field is missing from the returned result set from the data source.

[rsErrorReadingDataSetField] The data set €˜Revenue_By_Client€™ contains a definition for the Field €˜Branch€™. The data extension returned an error during reading the field.

[rsMissingFieldInDataSet] The data set €˜Main_Dataset_AZ€™ contains a definition for the Field €˜PostedAmount_InHouse€™. This field is missing from the returned result set from the data source.

[rsErrorReadingDataSetField] The data set €˜Main_Dataset_AZ€™ contains a definition for the Field €˜PostedAmount_InHouse€™. The data extension returned an error during reading the field.

Preview complete -- 0 errors, 4 warnings

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Oct 5, 2015

I need to convert a a string column to integer. Before converting, I need to check if it has blank values then convert it to NULL. Someone told me that its easier to convert it to NULL before converting to integer.

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Oct 9, 2015

I am using SSRS 2008 R2 Report Builder 3.0 (10.50.4276.0) . I have simple set of data which has a persons Title and Name e.g. Mr Smith, Miss Jones, Doctor Foster

The report has a parameter where the user can select which records to show based on the matching titles (Mr, Miss, Doctor)

The Query for the report uses Title in (@Title) where @Title is the only parameter which can take multiple values. The report works correctly for any 1 value selected, but as soon as 2 or more values are ticked in the drop down, it fails.

I believe the parameter value is being passed into the query with a comma separating the values e.g. Mr,Miss which causes the IN statement to give an error, as the statement would be where Title IN ('Mr,Miss') which does not match any of the data values.

The parameter value passed needs to be 'Mr','Miss' for the IN statement to work. What statement do I have to put in the report query to get it to select any of the data rows where the title matches any 1 of the selected values?

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Dec 23, 2007

I have a stored procedure that selects * from my table, and it seems to be working fine:
 USE myDB
GO
IF OBJECT_ID ( 'dbo.GetAll', 'P') IS NOT NULL
DROP PROCEDURE GetAll
GO
CREATE PROCEDURE GetAll
AS
DECLARE ref_cur Cursor
FOR
SELECT * FROM myTable
Open ref_cur
FETCH NEXT FROM ref_cur
DEALLOCATE ref_cur
 
The problem is, I'm trying to create a DB class, and I'm not sure what Parameter settings I'm supposed to use for my returned values.  Can anyone help me finish this?public class dbGet_base
{
public dbGet_base()
{
_requestId = 0;
}

public dbGet_base(Int64 RequestId)
{
this._requestId = RequestId;
getDbValues(RequestId);
}
public void getDbValues(Int64 RequestId)
{
getDbValues(RequestId, "GetAll");
}
public void getDbValues(Int64 RequestId, string SP_Name)
{
using(SqlConnection Conn = new SqlConnection(ConfigurationManager.AppSettings["WSConnection"]))
using (SqlCommand Command = new SqlCommand(SP_Name, Conn))
{
Command.CommandType = CommandType.StoredProcedure;
Command.Parameters.Add("@Request_Id", SqlDbType.Int).Value = RequestId;
Command.Parameters.Add(??
}

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