# Updating User Defined Table

### Data Update Methods

#### Upsert a Single User Defined Table Value

* **Description:** Inserts or updates a single value in a UDT using the upsert function, requiring table, mainKey, and secondaryKey to identify the record, and value for the data.
* **Syntax:**

  ```javascript
  pepperi.api.userDefinedTables.upsert({
    table: "<tableName>",
    mainKey: "<mainKey>",
    secondaryKey: "<secondaryKey>",
    value: "<value>"
  });
  ```
* **Example:**

  ```javascript
  pepperi.api.userDefinedTables.upsert({
    table: "myTable",
    mainKey: "Item123",
    secondaryKey: "Category124",
    value: "my value"
  });
  ```
* **Returns:**

  ```json
  {
      "success": true
  }
  ```