Truncation may occur due to inserting data from data flow column with a length of 425 to database column with a length of 255

Question

Hey Guys I am new with SQL and Visual Studios.
Now I want to get the data from my sql database into an excel file automatically but unfortunately if I try to connect the source with the destination I get the following Warning:

How can i solve this problem?
Thank you so much and sorry for being a bit lost.

Answer 1

Hi @Sum ,

Exclamation signs are just warning, not errors.

What is the source in the SSIS Data Flow? Please add as screen shot of the Data Flow to the original question.

It is very possible that the db table source columns lengths are too big. Design flaw?
Like the Rolename is 4000 chars, etc.

You can check max lengths of the column's values along the following:

SQL

USE AdventureWorks2019;  
GO  
  
SELECT MAX(LEN(LastName))  
FROM dbo.Person;  

Answer 2

Hi @Sum ,

It's warning message displays when any time source column data type length will be more than then length of destination datatype.

In order to remove this warning message from SSIS solution, make sure datatype length of the source column should be equal to the datatype length of the destination column.

Right click on source components and click on show advance editor. Go to input and output properties.

Click Output column --> select the warning columns and change the length to 255.

Regards，

Zoe

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