> For the complete documentation index, see [llms.txt](https://docs.postgresql.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.postgresql.tw/internals/views/view-pg-sequences.md).

# 53.24. pg\_sequences \#

The view `pg_sequences` provides access to useful information about each sequence in the database.

**Table 53.24. `pg_sequences` Columns**

| <p>Column Type</p><p>Description</p>                                                                                                                                                             |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| <p><code>schemaname</code> <code>name</code> (references <a href="/pages/p7uH9oRd2ZTbQCzy1qKB"><code>pg\_namespace</code></a>.<code>nspname</code>)</p><p>Name of schema containing sequence</p> |
| <p><code>sequencename</code> <code>name</code> (references <a href="/pages/b1fii6hWVNacZFXaxWON"><code>pg\_class</code></a>.<code>relname</code>)</p><p>Name of sequence</p>                     |
| <p><code>sequenceowner</code> <code>name</code> (references <a href="/pages/nyEMOe5gQKgypFQTDbjS"><code>pg\_authid</code></a>.<code>rolname</code>)</p><p>Name of sequence's owner</p>           |
| <p><code>data\_type</code> <code>regtype</code> (references <a href="/pages/Rnbzy6x669U98OjJh3D7"><code>pg\_type</code></a>.<code>oid</code>)</p><p>Data type of the sequence</p>                |
| <p><code>start\_value</code> <code>int8</code></p><p>Start value of the sequence</p>                                                                                                             |
| <p><code>min\_value</code> <code>int8</code></p><p>Minimum value of the sequence</p>                                                                                                             |
| <p><code>max\_value</code> <code>int8</code></p><p>Maximum value of the sequence</p>                                                                                                             |
| <p><code>increment\_by</code> <code>int8</code></p><p>Increment value of the sequence</p>                                                                                                        |
| <p><code>cycle</code> <code>bool</code></p><p>Whether the sequence cycles</p>                                                                                                                    |
| <p><code>cache\_size</code> <code>int8</code></p><p>Cache size of the sequence</p>                                                                                                               |
| <p><code>last\_value</code> <code>int8</code></p><p>The last sequence value written to disk. If caching is used, this value can be greater than the last value handed out from the sequence.</p> |

<br>

The `last_value` column will read as null if any of the following are true:

* The sequence has not been read from yet.
* The current user does not have `USAGE` or `SELECT` privilege on the sequence.
* The sequence is unlogged and the server is a standby.

***

原文：[PostgreSQL 18.6 Documentation](https://www.postgresql.org/docs/18/view-pg-sequences.html)（英文原文，待翻譯）


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