# General column configuration

The following general column configuration properties apply to most generators.

For information on about the general properties and how they are set in the application, go to [column-configure](https://docs.tonic.ai/fabricate/rule-based-tables-and-columns/table-columns/column-configure "mention").

```json
{
  "name": string, // Name of the column.
  "data_type": string,  // Database data type of the column values.
  "generator": string, // The name of the generator.
  "conditions": [  // Weighted distribution configuration.
                   // Available for a smaller set of generators
    {
      "subset_field": string, // Field for the weight condition
      "operator": "is_one_of"|"is_not_one_of"|"is_not_null",
                  // Comparison operator for the weight condition
      "subset_value": string  // Comparison value for the weight condition
      "weight": integer // The weight value
    }
  ],
  "default_weight": integer // Default weight if conditions aren't met
  "group_key": string,  // Group key to link related columns.
  "percent_null": integer,  // Percent of records to be null.
  "virtual": boolean,  // Whether to exclude the column from exported data.
  // Advanced options
  "primary_key": boolean, //Whether the column is a primary key.
  "index": boolean,  // Whether to index the column.
  "seed": string,  // The seed for random value generation.
                   // Setting this freezes the column until the seed changes.
  "postprocessing_sql": string, // SQL script to run after data generation.
}
```