# Constant Uses a single value to mask all of the values in the column. For example, you can replace every value in a string column with the value `String1`. Or you can replace every value in a numeric column with the value `12345`. ## Characteristics


Consistency	No, cannot be made consistent.
Linking	No, cannot be linked.
Differential privacy	Yes
Data-free	Yes
Allowed for primary keys	No
Allowed for unique columns	No
Uses format-preserving encryption (FPE)	No
Privacy ranking	1
Generator ID (for the API)	`ConstantGenerator`

## How to configure To configure the generator, in the **Constant Value** field, provide the value to use. The value must be compatible with the field type. For example, you cannot provide a string value for an integer column. If [Structural data encryption](https://docs.tonic.ai/app/generation/generators-assign-config/generators-data-encryption-config) is enabled, then to use it for this column, in the advanced options section, toggle **Use data encryption process** to the on position. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.tonic.ai/app/generation/generators/generator-reference/constant.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.