Difference between the DT_STR and DT_WSTR data types in SSIS

1. Difference between the DT_STR and DT_WSTR data types in SSIS
S.No DT_STR DT_WSTR
1 Definition: Definition:
A null-terminated ANSI/MBCS A null-terminated Unicode character
character string with a maximum string with a maximum length of 4000
length of 8000 characters. (If a characters. (If a column value contains
column value contains additional additional null terminators, the string
null terminators, the string will be will be truncated at the occurrence of
truncated at the occurrence of the the first null.)
first null.)
2 When DT_STR can be used ? When DT_STR can be used ?
When data is in ANSI code then When data is in Unicode then SSIS
SSIS package takes the data type package takes the data type as
as DT_STR. DT_WSTR.
3 How DT_STR can be mapped How DT_STR can be mapped in
in SQL Server ? SQL Server ?
DT_STR data type in SSIS can be DT_WSTR data type in SSIS can be
mapped to Char,VarChar data mapped to
types in SQL Server. nChar,nVarChar,Sql_Variant and
image data types in SQL Server.
References:
http://msdn.microsoft.com/en-us/library/ms141036.aspx
http://sqlserverquest.blogspot.in/2011/02/ssis-interview-questions-and-answers_9619.html
http://www.sqlservergeeks.com/blogs/RakeshMishra/sql-server-bi/247/data-types-
%C3%A2%E2%82%AC%E2%80%9C-sql-server-and-ssis
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