What is the infile SAS equivalent in SQL Server?
As per MSSQLTIPS documentation Transferring data from SAS to SQL Server and back SQL Server data typing is much richer than SAS, translating SQL Server values for use with SAS can be challenging. Even the topic of representing and processing missing data values is substantially different between SQL Server and SAS. SQL Server represents missing data values with NULL values, but SAS has a minimum of two ways of representing missing values: a period (.) for numeric missing values and a blank space (' ') for character missing values.

As DSD (delimiter-sensitive data) tells SAS to treats two
consecutive delimiters as a missing value and removes quotation marks
from character values.
Whereas SQL Server represents missing data
values with NULL values.

For further your ref here &amp; here