SSIS 2008：将SQL数据导出到Access数据库2010表

Question

I am creating a new SSIS 2008 ETL report that will read data from a SQL Server and append it to an ACCESS 2010 database table. How can I append records to an existing access table when there is an identity column in the Access table?

My current solution has an OLE DB source with SQL that reads the data. It connects to a data conversion task and then that connects to an OLE DB destination task. The identity field in the access table is named "Id" and it is an autonumber field.

I am able to insert the values using an OLE DB destination when the Access table is empty. The problem has to do with the identity field and when there are already records in the table.

So, the problem is that my Id column always starts at 1, which means I get an error as the engine thinks I am trying to insert a duplicate key.

I created a SQL Task that reads the max ID from the table and stores it into a variable, but now I am stuck trying to figure out how to use this value in my data flow export process.

Will someone please show me how to insert data into an Access DB when there are already records in the table?

Edited for clarity. I have added the SQL that I use to obtain the desired SQL records below. Note that I am NOT including the ID identity field in my SQL:

DECLARE @STARTDATE DATETIME = (SELECT CONVERT(VARCHAR(25),DATEADD(DD,-(DAY(DATEADD(MM,4,GETDATE()))-1),
DATEADD(MM,4,GETDATE())),101))

DECLARE @ENDDATE DATETIME = (SELECT CONVERT(VARCHAR(25),DATEADD(DD,-(DAY(DATEADD(MM,5,GETDATE()))),
DATEADD(MM,5,GETDATE())),101))

SELECT DISTINCT   
                      ISNULL(CONVERT(VARCHAR(3),PP.LOBCD),'CPP') 'LOB_Name_Product'
                    , POLICYID 'Policy_#'
                    , P.PRODUCERID 'Agent_#'
                    , CONVERT(VARCHAR(14),POLICYEFFDT,101) 'Policy_Eff_Date'
                    , CONVERT(VARCHAR(14),TS.POLICYEXPDT,101) 'Policy_Exp_Date'
                    , CONVERT(NUMERIC(15,2),TS.TERMPREMAMT) 'Inforce_Prem_Sum'
                    , REPLACE(CONVERT(CHAR(100),REPLACE(REPLACE(N.INSUREDNM,CHAR(10),' '),CHAR(13),'')),',',' ') AS  'Insured_Name'
                    , REPLACE(P.PRODUCERNM1TX,',',' ') AS 'Agent_Name'
                    , PD.PREDSTATECD 'Policy_State'
                    , REPLACE(II.ADDRLINE1TX ,',',' ') AS 'Insured_Address_1'
                    , REPLACE(ISNULL(II.ADDRLINE2TX,''),',',' ') AS 'Insured_Address_2'
                    , II.CITYNM 'Insured_City'
                    , II.STATECD 'Insured_State'
                    , CASE  WHEN LEN(RTRIM(II.ZIPCD)) > 5 THEN (SUBSTRING(II.ZIPCD,1,5) + '-' + SUBSTRING(II.ZIPCD,6,5))
                      ELSE II.ZIPCD
                      END 'Insured_Zip'
                     , REPLACE(P.PRODUCERADDRLINE1TX,',',' ') AS 'Agent_Address_1'
                     , REPLACE(ISNULL(P.PRODUCERADDRLINE2TX,''),',',' ') AS 'Agent_Address_2'
                     ,  P.PRODUCERCITYNM 'Agent_City'
                     , P.STATECD 'Agent_State'
                     ,  CASE  WHEN LEN(RTRIM(P.ZIPCD)) > 5 THEN SUBSTRING(RTRIM(P.ZIPCD),1,5) + '-' + SUBSTRING(RTRIM(P.ZIPCD),6,5)
                        ELSE P.ZIPCD
                        END 'Agent_Zip'  
                    , CONVERT(VARCHAR(10), GETDATE(), 101) AS 'Upload_Date' 
                    , 'Open' AS 'Status'                    

FROM COPOLICYPOINTER PP

JOIN COTRANSACTIONSUMMARY TS ON TS.SYSTEMASSIGNID = PP.SYSTEMASSIGNID
AND TS.TRANSSEQNO = (   SELECT MAX(TRANSSEQNO) FROM COTRANSACTIONSUMMARY TS2
                                                    WHERE TS2.SYSTEMASSIGNID = TS.SYSTEMASSIGNID)
AND TS.TRANSEFFDT = (       SELECT MAX(TRANSEFFDT) FROM COTRANSACTIONSUMMARY TS2
                                                    WHERE TS2.SYSTEMASSIGNID = TS.SYSTEMASSIGNID)

JOIN COPOLICYDETAIL PD ON TS.SYSTEMASSIGNID = PD.SYSTEMASSIGNID 
AND PD.TRANSSEQNO = (   SELECT MAX(TRANSSEQNO) FROM COPRODUCER PD2
                                                    WHERE PD2.SYSTEMASSIGNID = PD.SYSTEMASSIGNID)

JOIN COPRODUCER P ON P.SYSTEMASSIGNID = TS.SYSTEMASSIGNID 
AND P.TRANSSEQNO = (    SELECT MAX(TRANSSEQNO) FROM COPRODUCER P2
                                                WHERE P2.SYSTEMASSIGNID = P.SYSTEMASSIGNID)

JOIN COINSUREDNAME N ON N.SYSTEMASSIGNID = P.SYSTEMASSIGNID
AND N.TRANSSEQNO = (    SELECT MAX(TRANSSEQNO) FROM COINSUREDNAME N2
                                                WHERE N2.SYSTEMASSIGNID = N.SYSTEMASSIGNID) 

JOIN COINSUREDINFO II ON II.SYSTEMASSIGNID = N.SYSTEMASSIGNID
AND II.TRANSSEQNO = (   SELECT MAX(TRANSSEQNO) FROM COINSUREDINFO I2
                                                WHERE I2.SYSTEMASSIGNID = II.SYSTEMASSIGNID)

WHERE TS.POLICYEXPDT BETWEEN @STARTDATE AND @ENDDATE
AND PP.CANCEFFDT IS NULL 
AND PD.PREDSTATECD IN ('CT', 'RI', 'GA','NH','NY')

ORDER BY POLICYID

The results are linked to a Data Conversion Task.

The Data Conversion Task is then linked to an OLE DB Destination task.

The OLE DB Destination task uses an OLE DB Provider that connects to an Access Database. One of the Tables in this Database is called MasterTable and it has an autonumber field named ID.

I have added screenshots of the entire workflow below.

1. High-level data workflow

2. OLE DB Destination connection info to Access Database

Answer 1

I found a way to do what I need so I am posting the answer here in case it helps anyone else. I will summarize the steps below and then post the code. I am using SSIS 2008.

I derived this answer from a related answer I found on this site: What is the fastest way to insert 100 000 records into an MDB file in C#

1. Create a data flow task

2. In the data flow task, create an OLE Db source with your SQL code. This is the query that will give you the results to put into your Access Table.

3. Once I got the SQL working, I created a data conversion task and converted most of the columns to unicode (except the date columns). Pay attention to the names in the "Output Alias" column of the converter. These are the names you use in the C# script task shown below.

4. Save the results to a recordset destination. When you create the recordset, the "Component Properties" tab has a field named VariableName. Put a variable there. This variable will hold the results of the SQL query. I named mine "rsSourceTable." This variable is what the C# code will read to get our resultset.

5. Once you get the Data Flow task working, create a C# Script Task. I created several variables for use with the script task.

   
   The read-only variables:
   AccessPath - Holds the path where the Access file is located.
   rsSourceTable - the variable that holds the results of our data flow task.

   The read/write variables: MasterTableRowCount - I use this to make it easy to report the number of files inserted in log files and email tasks.

6. The c# code for the script task is shown below. I did not have to add any references to this.

using System;
using System.Data;
using Microsoft.SqlServer.Dts.Runtime;
using System.Windows.Forms;
using System.Data.OleDb;

namespace ST_afd8e3cca5534e51ba5855e82f502e92.csproj
{
    [System.AddIn.AddIn("ScriptMain", Version = "1.0", Publisher = "", Description = "")]
    public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
    {

        #region VSTA generated code
        enum ScriptResults
        {
            Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success,
            Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure
        };
        #endregion

        public void Main()
        {
            OleDbConnection myConnection = new OleDbConnection();
            try
            {
                string accessPath = Dts.Variables["AccessPath"].Value.ToString();
                string materTableId = Dts.Variables["MasterTableId"].Value.ToString();
                myConnection.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + accessPath;
                DataTable dt = new DataTable();
                OleDbDataAdapter adapter = new OleDbDataAdapter();
                adapter.Fill(dt, Dts.Variables["User::rsSourceTable"].Value);
                int rowCount = 0;
                if (dt.Rows.Count > 0)
                {
                    rowCount = dt.Rows.Count;
                    Dts.Variables["MasterTableRowCount"].Value.ToString();
                    myConnection.Open();
                    //1. When building the INSERT statement, remember to enclose column names in square brackets. This prevents errors because Access allows special characters in column names and OLE DB doesn't 
                    //2. Also remember that the order the column names appear in the INSERT statement is important for the code that adds parameters below.
                    //3. To prevent an error, the INSERT statement is first constructed with a ? for each parameter. The parameter is replaced with the
                    //   appropriate column name in the for loop below. 
                    string insertString = "INSERT INTO MasterTable ([LOB_Name_Product], [Policy_#], [Policy_State], [Policy_Eff_Date], [Policy_Exp_Date], [Insured_Name], [Insured_Address_1], ";
                    insertString += "[Insured_Address_2], [Insured_City], [Agent_#], [Agent_Name], [Inforce_Prem_Sum], [Status], [Upload_date], [Insured_Zip], [Insured_State], [Agent_Address_1], [Agent_Address_2], [Agent_City], [Agent_Zip], [Agent_State])";
                    insertString += " Values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
                    OleDbCommand cmmd = new OleDbCommand(insertString, myConnection);
                    if (myConnection.State == ConnectionState.Open)
                    {
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //LOB_Name_Product
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Policy_#
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Policy_State
                        cmmd.Parameters.Add("?", OleDbType.DBDate, 10);     //Policy_Eff_Date
                        cmmd.Parameters.Add("?", OleDbType.DBDate, 10);     //Policy_Exp_Date
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Insured_Name
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Insured_Address_1
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Insured_Address_2
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Insured_City
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Agent_#
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Agent_Name
                        cmmd.Parameters.Add("?", OleDbType.Currency, 255);  //Inforce_Prem_Sum
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Status
                        cmmd.Parameters.Add("?", OleDbType.Date, 10);       //Upload_date
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Insured_Zip
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Insured_State
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Agent_Address_1
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Agent_Address_2
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Agent_City
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Agent_Zip
                        cmmd.Parameters.Add("?", OleDbType.VarWChar, 255);  //Agent_State
                        cmmd.Prepare();
                        OleDbTransaction trans = myConnection.BeginTransaction();
                        cmmd.Transaction = trans;
                        foreach(DataRow dr in dt.Rows)
                        {
                            cmmd.Parameters[0].Value = dr["Copy of LOB_Name_Product"];
                            cmmd.Parameters[1].Value = dr["Copy of Policy_#"];
                            cmmd.Parameters[2].Value = dr["Copy of Policy_State"];
                            cmmd.Parameters[3].Value = dr["Policy_Eff_Date"];
                            cmmd.Parameters[4].Value = dr["Policy_Exp_Date"];
                            cmmd.Parameters[5].Value = dr["Copy of Insured_Name"];
                            cmmd.Parameters[6].Value = dr["Copy of Insured_Address_1"];
                            cmmd.Parameters[7].Value = dr["Copy of Insured_Address_2"];
                            cmmd.Parameters[8].Value = dr["Copy of Insured_City"];
                            cmmd.Parameters[9].Value = dr["Copy of Agent_#"];
                            cmmd.Parameters[10].Value = dr["Copy of Agent_Name"];
                            cmmd.Parameters[11].Value = dr["Copy of Inforce_Prem_Sum"];
                            cmmd.Parameters[12].Value = "Open";
                            cmmd.Parameters[13].Value = DateTime.Today.ToString("d");
                            cmmd.Parameters[14].Value = dr["Copy of Insured_Zip"];
                            cmmd.Parameters[15].Value = dr["Copy of Insured_State"];
                            cmmd.Parameters[16].Value = dr["Copy of Agent_Address_1"];
                            cmmd.Parameters[17].Value = dr["Copy of Agent_Address_2"];
                            cmmd.Parameters[18].Value = dr["Copy of Agent_City"];
                            cmmd.Parameters[19].Value = dr["Copy of Agent_Zip"];
                            cmmd.Parameters[20].Value = dr["Copy of Agent_State"];
                            cmmd.ExecuteNonQuery();
                        }
                        trans.Commit();
                        myConnection.Close();
                        Dts.TaskResult = (int)ScriptResults.Success; //add logging here for successful operation
                    }
                    else
                        Dts.TaskResult = (int)ScriptResults.Failure;
                }
                else
                    Dts.TaskResult = (int)ScriptResults.Success; //add logging here for no records

            }
            catch (OleDbException oleEx)
            {
                myConnection.Close();
                Dts.TaskResult = (int)ScriptResults.Failure; //add logging here for unable to connect
            }
            catch (Exception ex)
            {
                myConnection.Close();
                Dts.TaskResult = (int)ScriptResults.Failure; //add logging here for any other error
            }

        }
    }
}