# Dynamic Columns Functions

- [COLUMN\_ADD](https://mariadb.com/docs/server/reference/sql-functions/special-functions/dynamic-columns-functions/column_add.md): Update dynamic columns. This function adds or updates values within a dynamic column blob, returning the new blob content.
- [COLUMN\_CHECK](https://mariadb.com/docs/server/reference/sql-functions/special-functions/dynamic-columns-functions/column_check.md): Verify dynamic column integrity. This function checks if a blob containing dynamic columns is valid and returns 1 if it is, 0 otherwise.
- [COLUMN\_CREATE](https://mariadb.com/docs/server/reference/sql-functions/special-functions/dynamic-columns-functions/column_create.md): Create a dynamic column blob. This function generates a binary string containing specified column names and values for storage in a BLOB.
- [COLUMN\_DELETE](https://mariadb.com/docs/server/reference/sql-functions/special-functions/dynamic-columns-functions/column_delete.md): Remove dynamic columns. This function deletes specified columns from a dynamic column blob and returns the updated blob.
- [COLUMN\_EXISTS](https://mariadb.com/docs/server/reference/sql-functions/special-functions/dynamic-columns-functions/column_exists.md): Check for a dynamic column. This function returns 1 if a specified column exists within a dynamic column blob, and 0 otherwise.
- [COLUMN\_GET](https://mariadb.com/docs/server/reference/sql-functions/special-functions/dynamic-columns-functions/column_get.md): Retrieve a dynamic column value. This function extracts a specific column's value from a dynamic column blob, casting it to a specified type.
- [COLUMN\_JSON](https://mariadb.com/docs/server/reference/sql-functions/special-functions/dynamic-columns-functions/column_json.md): Convert dynamic columns to JSON. This function returns a JSON string representation of the data stored in a dynamic column blob.
- [COLUMN\_LIST](https://mariadb.com/docs/server/reference/sql-functions/special-functions/dynamic-columns-functions/column_list.md): List dynamic column names. This function returns a comma-separated list of all column names contained within a dynamic column blob.


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