--- type: WebPage title: 10 Essential Data Masking Techniques for GDPR Compliance in SQL | by Rohan Dutt | Apr, 2026 | Medium description: "" resource: https://medium.com/@Rohan_Dutt/10-essential-data-masking-techniques-for-gdpr-compliance-in-sql-82147837e262?sk=35acc547077cd4c2d222a17a8768e61c tags: [] timestamp: 2026-06-15T02:15:48Z --- [Sitemap](/sitemap/sitemap.xml) [Open in app](https://play.google.com/store/apps/details?id=com.medium.reader&referrer=utm_source%3DmobileNavBar&source=post_page---top_nav_layout_nav-----------------------------------------) Sign up [Sign in](/m/signin?operation=login&redirect=https%3A%2F%2Fmedium.com%2F%40Rohan_Dutt%2F10-essential-data-masking-techniques-for-gdpr-compliance-in-sql-82147837e262&source=post_page---top_nav_layout_nav-----------------------global_nav------------------) [Medium Logo](/?source=post_page---top_nav_layout_nav-----------------------------------------) Get app [Write](/m/signin?operation=register&redirect=https%3A%2F%2Fmedium.com%2Fnew-story&source=---top_nav_layout_nav-----------------------new_post_topnav------------------) [Search](/search?source=post_page---top_nav_layout_nav-----------------------------------------) Sign up [Sign in](/m/signin?operation=login&redirect=https%3A%2F%2Fmedium.com%2F%40Rohan_Dutt%2F10-essential-data-masking-techniques-for-gdpr-compliance-in-sql-82147837e262&source=post_page---top_nav_layout_nav-----------------------global_nav------------------) ![Unknown user](https://miro.medium.com/v2/resize:fill:64:64/1*dmbNkD5D-u45r44go_cf0g.png) Member-only story # 10 Essential Data Masking Techniques for GDPR Compliance in SQL ## Practical SQL techniques to anonymize sensitive data while preserving analytical value and regulatory compliance [![Rohan Dutt](https://miro.medium.com/v2/resize:fill:64:64/1*Iv3FiV3JlL7FZZ9f0lAn7Q.jpeg)](/@Rohan_Dutt?source=post_page---byline--82147837e262---------------------------------------) [Rohan Dutt](/@Rohan_Dutt?source=post_page---byline--82147837e262---------------------------------------) 8 min read · Apr 21, 2026 -- 3 [Listen](/m/signin?actionUrl=https%3A%2F%2Fmedium.com%2Fplans%3Fdimension%3Dpost_audio_button%26postId%3D82147837e262&operation=register&redirect=https%3A%2F%2Fmedium.com%2F%40Rohan_Dutt%2F10-essential-data-masking-techniques-for-gdpr-compliance-in-sql-82147837e262&source=---header_actions--82147837e262---------------------post_audio_button------------------) Share Press enter or click to view image in full size ![]() Image by [datasunrise](https://www.datasunrise.com/) ***— Non Member****: Pls take a look* [***here***](/@Rohan_Dutt/10-essential-data-masking-techniques-for-gdpr-compliance-in-sql-82147837e262?sk=35acc547077cd4c2d222a17a8768e61c)**!** SQL data masking techniques for GDPR-compliant data protection. These methods safeguard sensitive information while preserving usability for analytics. ## 1. Dynamic Partial Masking (Not Just Static) *Static masking shows the same* ***XXXXX*** *to everyone, which fails role-based access controls required by GDPR.* *Dynamic masking uses* ***CASE*** *statements to show different data based on user roles, ensuring only authorized roles see sensitive data.* ### Why it matters: > GDPR Article 32 requires data protection by design. > > Dynamic masking implements this at the query level, preventing unauthorized access without maintaining separate datasets. ### Implementation: ``` -- Create role-based view that masks SSN for non-admin users CREATE VIEW v_customer_ssn AS SELECT… ``` -- -- 3 [![Rohan Dutt](https://miro.medium.com/v2/resize:fill:96:96/1*Iv3FiV3JlL7FZZ9f0lAn7Q.jpeg)](/@Rohan_Dutt?source=post_page---post_author_info--82147837e262---------------------------------------) [![Rohan Dutt](https://miro.medium.com/v2/resize:fill:128:128/1*Iv3FiV3JlL7FZZ9f0lAn7Q.jpeg)](/@Rohan_Dutt?source=post_page---post_author_info--82147837e262---------------------------------------) [## Written by Rohan Dutt](/@Rohan_Dutt?source=post_page---post_author_info--82147837e262---------------------------------------) [2.5K followers](/@Rohan_Dutt/followers?source=post_page---post_author_info--82147837e262---------------------------------------) ·[84 following](/@Rohan_Dutt/following?source=post_page---post_author_info--82147837e262---------------------------------------) I am a data scientist passionate about AI and its potentials. And love to write about my experiences in the tech industry and latest tech developments. 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