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Data & Analytics · Advanced

Object Tagging

Attaching key-value tags to Snowflake objects (accounts, warehouses, tables, columns) to track sensitive data, cost centers and ownership.

Definition

Tags are inherited down the object hierarchy, can drive tag-based masking policies and are reported in ACCOUNT_USAGE.TAG_REFERENCES. Snowflake's automatic sensitive data classification applies system tags such as SEMANTIC_CATEGORY.

Example

ALTER TABLE customers MODIFY COLUMN email SET TAG pii_type = 'email';

Exam tip

Tag-based masking applies one policy to every column carrying a tag.

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