SAS sequential access file
File type: Various data file
A .sqn file is a SAS sequential access file used by SAS to store sequential-access data.
It belongs to SAS, software for analyzing business and other statistical data.
File type category:
Various data file
Date updated: October 28, 2026
The .sqn file extension identifies a sequential access file associated with SAS software from SAS Institute. The file stores data that SAS reads in sequential order.
SAS uses the file as part of its data analysis and data-mining workflows. It is a data file rather than a standalone document intended for general-purpose applications.
This format is supported by SAS on Microsoft Windows. The file may be encountered alongside other files created or used by a SAS project.
Open the .sqn file with SAS on Microsoft Windows. Use SAS's file or data-import features to access the data rather than opening the file in a general-purpose text editor.
Use SAS to read the sequential access data and write it to another SAS data set or to an exchange format supported by SAS. A general-purpose converter is not normally required or appropriate for this SAS-specific file.
Software applications that handle other tasks involving sqn files:
Microsoft Windows
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