How to Calculate Difference between current and previous rows in SSIS then use that result to add a new column to the existing table
I'm assuming when you say "current and previous rows" is
Create 2 package variables, lets say: 'NumBefore'and 'NumAfter'.
Both are Int32.
Inside the Data Flow Task, use a source component (lets say OLEDB Source) and select if its a table or a query. Lets say a table T
Drag 'Row Count' in the Data Flow Transformations list. Double click it and in the Section Variable Names, select the variable 'User::NumBefore'. Row Count task will save, in runtime, the result of the calculation in that variable.
Do whatever you want to do with the data extracted from table T. My guess is that you are going to insert new rows in the same table T, right?
You have to use a second Data Flow Task in the Control Flow. Inside drag another OLEDB Source with the same table T. Use another Row Count Task, but this time use the variable 'User::NumAfter'. After the Row Count Task use either a Script Component or a derived column.
If you use Derived Column, write a name for the column, choose the option 'Replace xxxx' if you want to replace the value of xxx column, or 'Add column' if you want to add that as a column output.
In expression, write: #[User::NumAfter] - #[User::NumBefore]. and the place your OLEDB Destination.
Hope this was you were looking for
Related
I want to insert flat file data to two different sql table.But some additional field coming from flat file should be inserted to other table on the basis of indicator field but the usual field coming should be inserted into the regular table.
The other issue,the additional field to be inserted cannot be inserted directly because of no column mapping.
eg:
1234 056 Y Tushar
5678 065 N
So 1234 056 should be inserted to regular table but indicator Y tells us that Tushar should be inserted to other table.
But the table in which I want to Insert Tushar cannot be done directly as it does not have 1234 column name.
For indicator N also it should get inserted normally in the base table.
So what I did was I used a conditional split and then used ole db command but it it inserting multiple records in the table.
If you put a Multicast task right after your flat file source, you can create extra copies of your data set. Then you can use one copy to insert into Regular Table, and then you can put your Conditional Split on the second copy.
Your data flow would then look like this:
In my Flat File Source I defined four columns:
The Multicast doesn't need any configuration, and I assume the Regular Table destination isn't giving you the trouble. So next, you'd create the Indicator check with a Conditional Split task. Check for a value of Y like this:
Then just map whichever available columns you want to insert into Other Table. I chose the second column (I called mine Seq) and the Name column. You may have these named differently.
I'm working on an SSIS package, the goal of the package is to take a spreadsheet that has several columns (we need PartNum, PartType, and Qty)
and for each row in the spreadsheet, run a query to calculate consumption and dump that into a separate sheet.
I've got a few problems, but my initial problem, is that I have two part types, Manufactured and Purchased. I only want to run the query against Manufactured pieces. How Can I do that in SSIS? I'm trying to set it up in the expression builder for the variable to equal "M", but this always evaluates to false.
Ideally, I want to filter on both Part Type = M and Qty > 0.
Here is a picture of the SSIS package, basically I'm using a data flow to bring a spreadsheet into a Recordset, and then in a Foreach loops, an OLEDB Source to pass query parameters (the part and qty variables) to export into a .csv
In the initial Data Flow Task from the Excel Source into the Recordset Destination, instead of loading the entire Excel file just select records that satisfy the given criteria. Unless you need these records for another purpose in the package, this will also prevent adding unused rows in the Recordset Destination and processing them in subsequent components. You can do this in the Excel Source by changing the Data Access Mode to SQL Command and adding the necessary filters. Excel can be queried similar to SQL. The query you want should be somewhat similar to the following, with the table and column names substituted appropriately. If the columns contain spaces in their names, these will need to be enclosed in square brackets. For example, PartType would be [Part Type].
SELECT
PartNum,
PartType,
Qty
FROM Excel_Sheet
WHERE PartType = 'M' AND Qty > 0
I've build a job that copy data from a mysql db table to b mysql table.
The table columns are the same except sometimes a new column can be added in table a db.
i want to retrieve all the columns from a to b but only those that exists in table b. i was able to put in the query specific select colume statment that exists in table b like:
select coulmn1,column2,columns3... from table a
the issue is if i add a new column in b that matches a the talend job schema in Mysqlinput should be changed as well cause i work with build in type.
Is there a way to force the schema columns during the job running?
If you are using a subscription version of Talend, you can use the dynamic column type. You can define a single column for your input of type "Dynamic" and map it to a column of the same type in your output component. This will dynamically get columns from table a and map them to the same columns in table b. Here's an example.
If you are using Talend Open Studio, things get a little trickier as Talend expects a list of columns for the input and output components that need to be defined at design time.
Here's a solution I put together to work around this limitation.
The idea is to list all table a's columns that are present in table b. Then convert it to a comma separated list of columns, in my example id,Theme,name and store it in a global variable COLUMN_LIST. A second output of the tMap builds the same list of columns, but this time putting single quotes between columns (so as they can be used as parameters to the CONCAT function later), then add single quotes to the beginning and end, like so: "'", id,"','",Theme,"','",name,"'" and store it in a global variable CONCAT_LIST.
On the next subjob, I query table a using the CONCAT function, giving it the list of columns to be concatenated CONCAT_LIST, thus retrieving each record in a single column like so 'value1', 'value2',..etc
Then at last I execute an INSERT query against table b, by specifying the list of columns given by the global variable COLUMN_LIST, and the values to be inserted as a single string resulting from the CONCAT function (row6.values).
This solution is generic, if you replace your table names by context variables, you can use it to copy data from any MySQL table to another table.
What is the expression in SSIS to get the same dates as in source to destination. If I am using GETDATE() it will give current date but I want the same dates mentioned in source.
It sounds like you are looking to have the same date value for each row as it moves from the Source to the Destination. You can create your own variable and add it as a Derived Column transformation to the dataflow or you can use a system variable like ContainerStartTime from an Audit transformation (or Derived Column, too).
Here's an article on all the available System Variables in SSIS.
Since your wording was "same dates mentioned in source", you could do the following to get a single date from the source and use it in your data flow.
On the control flow, create a SQL task that returns GETDATE() as a single row result set from the source server. Save this result to a variable.
Within a data flow, add a derived column transformation after the source. Add the new variable value to the flow as a new column.
Map it to the destination column for a single date/time value that was derived from the source system right before the operation began.
I have an Excel sheet (input) where each row needs to be saved in one of three SQL server tables based on the Record type (column 1) of the row.
Example:
If the Record type is EMP, the whole row should go to the Employee table.
If the Record type is CUS, the whole row should go to the Customer table
I am trying to use a multicast and not sure how to split the data from multicast to the destination table. Do I need any other control in between?
Any idea would be appreciated.
A Conditional Split Component sounds like just want you need. A Conditional Split uses expressions you define to route each input row to one output. In your case, your Conditional Split would define three outputs, each of which would be attached to a SQL destination.
In comparison, the Multicast Component you're currently using sends each input row to all outputs. This component would be useful if you were trying to save a copy of each row to all three SQL destinations.