# Triggers ## What is a Trigger? Triggers are SQL statements you can set to run every time a row is inserted, updated, or deleted from a particular table. Triggers receive the value of the row being inserted, updated, or deleted like a parameter, and can change it in some cases. Database users create triggers. Triggers are schema. Triggers are stored along with other schema elements in the database. ## How to use Triggers Triggers are a general tool, but they are most commonly used to enforce complex constraints that can't be expressed by foreign keys, nullness, types, or the `check` syntax. Triggers in Doltgres are not yet supported. Check back for updates. ## Interaction with Doltgres Version Control Triggers are versioned in the `dolt_schemas` table just like [views](/concepts/sql/views.md). You add and commit that table just like any other changed table after you create or modify a trigger. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.doltgres.com/concepts/sql/triggers.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.