I am trying to insert records into 3 different Oracle tables from the same source query. I tried using MultiCast but i had dependencies on other tables so that dint work.
I want to table to get executed in a sequential manner. Is there any other way to run this?
I tried using MultiCast but i had dependencies on other tables so that dint work.
I am expecting something like this:
Related
I'm using a data flow task and 2 Ole Db sources. The 2 sources bring in data from tables on 2 different databases on the same server. The 2 tables can be mapped by ids. All of the ids from the second table (closedstops) exist in the first table (stops). I need to remove all the the closed stops by id from the first table. Afterwards I need to export the first table out of the database into a text file.
Do I need to use a merge join before deleting or do I need to use a ole db command to delete records (see attached screenshot). I have looked at many questions and answers on stackoverflow as well as tutorials and none of them quite answer my question. Any help is greatly appreciated. Thank you.
Closed stops is the driver table. Leave it be.
Instead of an OLE DB Source table for "stops" change that to a Lookup Component. You are only interested in rows that match.
And then you can use your OLE DB Command to fire off single delete statements.
My preference for performance and traceability would be to insert all the "to be deleted" ids into a table on the Stops database. When the Data Flow has completed, an Execute SQL Task would then fire up to perform the deletes in a set based operation(s).
Imagine that you want to save in a variable the number of rows the were updated or deleted in a table.
This is the steps that i did:
First, in the Control flow i created a Data Flow Task.
Them, in the Data Flow, i created a source(in my case is a excel file), then i proceeded to create two variables to count those rows- countDeleted and countUpdated, then connected the variables to two row count transformations, and them connected my destination (OLE DB).
Now in the control flow, what do i do??
Create a SQL execute task?? or a Script task?? What is the best way to do it?? What is the piece of code to use??
Thanks for youy help.
PS: i only have 4 weeks off SSIS, sorry for my noobieness :)
An OLD DB destination only inserts. It can't UPDATE or DELETE
What's your logic for updating or deleting?
If you're just starting out and reading about doing things in SSIS you will eventually find advice to use the OLE DB Command to perform row by row delete and inserts.
In my opinion this is to be avoided. It does not scale (works fine for small recorsets then fails for large recordsets), and it is difficult to maintain parameter mappings in the OLE DB Command. Although you should try it anyway to familiarise yourself with it.
My advice is to load the Excel data into a staging table, perform batch DELETE and UPDATE statements to load the data and use ##ROWCOUNT to capture the records updated.
For example;
Your existing described dataflow can be used to load into a table called StagingTable
Before your dataflow you should run an Execute SQL Task (This is in the Control Flow pane, not the Data Flow pane) that clears the staging table:
TRUNCATE TABLE StagingTable;
So first get that working - repeatedly running your package clears the staging table then loads Excel into it without creating duplicates
This in itself is a challenge as Excel is a terrible data interchange format.
Once you have that working, you add an execute SQL task to the end that runs some SQL that deletes the records you want and captures the count. For example:
DELETE FROM MyFinalTable WHERE PriamryKey IN (SELECT PrimaryKey FROM StagingTable);
SELECT ##ROWCOUNT;
Then you follow the instructions here to load that back to your SSIS variable
http://microsoft-ssis.blogspot.com/2011/03/rowcount-for-execute-sql-statement.html
What are you doing with this row count? Are you writing it to a logging table? Save
yourself the bother of pulling it back into an SSIS variable and just write it directly:
DELETE FROM MyFinalTable WHERE PriamryKey IN (SELECT PrimaryKey FROM StagingTable);
INSERT INTO LogTable(Table,Operation,Type)
SELECT 'MyFinalTable','Delete', ##ROWCOUNT;
In my experience it is not a good idea to build convoluted logic into SSIS packages if you can instead do in a database. Although it does depend on the person who has to eventually maintain it. Hopefully you can appreciate that this T-SQL approach is a more straightforward code based approach as opposed to having to dig around in property pages and events and other places inside SSIS packages.
I assume that you're using an Execute SQL Task for the updates and deletes? As #Nick.McDermaid mentioned, using an OLE DB Command within a Data Flow presents various issues when performing DML. You can find the number of rows updated, inserted, or deleted in a table through an Execute SQL Task by using the ExecValueVariable property of this task. Set the variable that will hold the row count to this property and it will return the number of affected rows. Note that is will only return the number of rows impacted by the last statement in the Execute SQL Task, regardless of batches (i.e. GO separators) are in the component.
I'm using Pentaho Data Integration for my ETL process...
I have multiple excel files that I need to merge and upload in one database. However, I cannot Distribute the fields into its corresponding tables in the database. I can only send it to one table at a time. Is there any other way to do this? How can I have multiple target table?
P.S. I'm using MySQL Workbench for the database.
Thank you for your help!
You can connect multiple Table output steps to your last processing step and set it to copy all rows to both or all target steps. Connect Table outputs (or Insert/update, etc) like in the image, then right-click the step where the stream splits and select Copy Data to Next Steps. In the Table outputs you obviously only specify the columns that apply to that table.
I'm using SSIS to fetch data from two Informix servers. I'm using a Merge Join object to combine the data together. Now, I need to summarize the data for reporting.
I worked up the T-SQL for pivoting, counting and summing the data I want, but I don't know how to do that in SSIS. I just want to run a query against the output of the Merge Join. How do I do that?
The pivot object looks too simplex for the job.
Thanks!
I'd suggest that you insert the product of the merge join to a staging table and finish off the dataflow that way. Then start a new data flow with your t-sql code (referencing the staging table) as the source and then run it directly into the destination.
I would try sending the results of your data flow task to a object-typed variable. I believe you can manipulate the data directly in memory rather than dumping it to disk.
http://www.sqlservercentral.com/articles/Integration+Services+(SSIS)/64014/
I am new to SSIS, so please bear with me.
I created an Integration Services Project for SQL Server 2008 to import data from an old db to a new one. One of the things I need to do is import data from two old source tables into one new destination table.
What is the best way to do this?
I can easily see the results I want with a simple inner join query using tsql, but am not having any luck using the SSIS package. My current approach is a three step process:
Add OLE DB Source component that pulls all columns from my first source table
Add a Lookup component, which is the next step after my OLE DB Source component. In this I query the second source table 'using the results of a sql query' that returns no nulls, then drag the foreign key id from the 'available input columns' to the primary key in the available lookup columns. I also check the checkboxes in 'available input columns' to add 2 more columns.
Add OLE DB Destination, pointed to my destination table.
This process fails at the first step, not at the lookup step, and fails with the error "Row yielded no match during lookup". The foreign key cannot be null, and obviously the primary key can't either. I used a SQL statement in step to so I could make sure I don't get any null date values in the columns (there were a few) but I am still getting the error. If I output the first step failure path to a Flat File Destination, I get an empty CSV (watching in debug mode says ~600k records go into the flat file).
I am pretty stumped at this point and this seems like it should be super easy task. I have scoured the web for answers, and found this link that sounds like the same exact problem I am having, but changing the cache setting didn't help.
Help appreciated!
It sounds like you have a mismatch in the lookup. I'd hand run the queries and verify that tha both OLE DB SOurce has no null foriegn keys; and that each foreign-key matches something in the lookup table.
There is a simpler approach here. Use your inner join query you mentioned in the OLE DB SOurce. Don't use the table select, provide your SQL query with the join. This let's the SQL Server do all of the heavy lifting of the join and then SSIS can do the transferring.