---
title: gen.tables() function
description: >
  `gen.tables()` generates a stream of table data.
menu:
  flux_v0_ref:
    name: gen.tables
    parent: internal/gen
    identifier: internal/gen/tables
weight: 201
---

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`gen.tables()` generates a stream of table data.



##### Function type signature

```js
(
    n: int,
    ?nulls: float,
    ?seed: int,
    ?tags: [{name: string, cardinality: int}],
) => stream[{A with _value: float, _time: time}]
```

{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}

## Parameters

### n
({{< req >}})
Number of rows to generate.



### nulls

Percentage chance that a null value will be used in the input. Valid value range is `[0.0 - 1.0]`.



### tags

Set of tags with their cardinality to generate.



### seed

Pass seed to tables generator to get the very same sequence each time.