24 lines
1.1 KiB
Markdown
24 lines
1.1 KiB
Markdown
---
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title: "MySQL: (Re)set the auto-increment value of a table"
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kind: article
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slug: mysql-reset-the-auto-increment-value-of-a-table
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created_at: 2007-11-30
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tags:
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- General
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- Blog
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- Databases
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- MySQL
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- development
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---
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Sometimes it's necessary to set the starting point of a MySQL auto-increment value.
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Normally, MySQL starts auto-incrementing at 1. But let's say you want to start at 10.000, because you want at least a five figure number. You can use the following query to set the MySQL auto-index:
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<pre lang="sql">ALTER TABLE some_table AUTO_INCREMENT=10000</pre>
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If you want to delete all records from your table and restart auto-index at 1, you might be tempted to run a DELETE query, followed by the above example, setting the auto increment value to 1. There is a shortcut, however:
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<pre lang="sql">TRUNCATE TABLE some_table</pre>
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This will basically reset the table, deleting all data and resetting the auto increment index. Do not that the truncate command is a hard-reset option. For instance, any triggers "ON DELETE" will not be fired when using truncate. |