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> Mirror of <https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/json.html> (Salesforce, Data 360 Query Guide), read 2026-10-23. Salesforce's own page is the authority; this copy exists because that site refuses non-browser readers.

## JSON Type

**Applies to:** ✅ Data 360 SQL ✅ Tableau Hyper API

The `json` type stores a JSON (JavaScript Object Notation) value, such as an object, array, string, number, boolean, or `null`. Use it to model semi-structured data in a single SQL value, for example nested attributes that don’t map cleanly to columns.

You can create `json` values in these ways.

*   By parsing a string with the `[json](../scalar-func/json-func/json-constructor.md)` constructor or a cast (see [Parsing and Validation](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/json.html#parsing-and-validation) below).
*   By building values from SQL data with `[json_array](../scalar-func/json-func/json-array.md)`, `[json_object](../scalar-func/json-func/json-object.md)`, or `[json_scalar](../scalar-func/json-func/json-scalar.md)`.

For a comprehensive overview of supported operations, see [JSON Functions](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/json-funcs.html).

You can convert a string to `json` with the `json` constructor, or with a cast using `CAST`, `TRY_CAST`, or `::` (see [Type Conversions](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/type-conversion.html) for the general cast syntax). All three forms validate that the string is a well-formed JSON document.

Returns `{"a":1}`.

Raises an error because the input isn’t valid JSON.

Returns `NULL` instead of raising an error.

Validation follows the JSON standard.

*   Numbers in scientific notation are accepted, for example `1e2`, `1E+2`, and `1e-2`. Malformed numbers such as `2.e+3`, `0.e1`, or `[1.]` are rejected.
*   Control characters inside strings must be escaped. The DEL control character (`0x7F`) doesn’t require escaping.

*   When a `json` value is embedded into another JSON value by `[json_array](../scalar-func/json-func/json-array.md)` or `[json_object](../scalar-func/json-func/json-object.md)`, it’s copied in directly rather than escaped as a string.

*   [JSON Functions](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/json-funcs.html) - Overview of all JSON construction functions.
*   `[json](../scalar-func/json-func/json-constructor.md)` - Parse a string into a JSON value.
*   [Type Conversions](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/type-conversion.html) - Type casting and coercion.
*   [Data Types](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/datatypes.html) - Overview of all Data 360 SQL types.


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