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skills/seekdb-docs/official-docs/200.develop/900.sdk/50.apis/300.dml/100.dml-overview-of-api.md

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+---
+slug: /dml-overview-of-api
+---
+
+# DML operations
+
+DML (Data Manipulation Language) operations allow you to insert, update, and delete data in a collection.
+
+For DML operations, you can use the following APIs.
+
+| API | Description | Documentation |
+|---|---|---|
+| `add()` | Inserts a new record into a collection. | [Documentation](200.add-data-of-api.md) |
+| `update()` | Updates an existing record in a collection. |[Documentation](300.update-data-of-api.md)|
+| `upsert()`  | Inserts a new record or updates an existing record.  |[Documentation](400.upsert-data-of-api.md)|
+| `delete()`  | Deletes a record from a collection.|[Documentation](500.delete-data-of-api.md)|