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I have an SSIS Package that is copying data from a column that is Nullable to a table where the same column is not Nullable. There is red tape involved in making the source not nullable so for now I need a way to change the nulls to empty strings.
I get the data from an ADO .Net Source, not a query where I could just add a check for null. If need be I can switch to a query and just do the check at that point. Before I do that I wanted to see if there is an SSIS tranformation that would allow me to switch the Null to empty string (and still use the same column).
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An empty string is a string instance of zero length, whereas a null string has no value at all. An empty string is represented as "" . It is a character sequence of zero characters. A null string is represented by null .
Null Values can be replaced in SQL by using UPDATE, SET, and WHERE to search a column in a table for nulls and replace them. In the example above it replaces them with 0. Cleaning data is important for analytics because messy data can lead to incorrect analysis.
The value null represents the absence of any object, while the empty string is an object of type String with zero characters.
In this article, we will look into how you can set the column value to Null in SQL. update students set Gender = NULL where Gender='F'; SELECT * FROM students ; Output: Column value can also be set to NULL without specifying the 'where' condition.
Use the Derived Column transformation. You would then select replace your_column_name from the derived column drop down and then populate the expression property with this code:
ISNULL( [your_column_name] ) ? " " : [your_column_name]
Hope this helps.
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