How to update Cassandra from Excel

The CData Excel Add-In for Cassandra enables you to edit and save Cassandra data directly from Excel. This article explains how to transfer data from Excel to Cassandra. This technique is useful if you want to work on Cassandra data in Excel and update changes, or if you have a whole spreadsheet you want to import into Cassandra. In this example, you will use the Customer table; however, the same process will work for any table that can be retrieved by the CData Excel Add-In.

Establish a Connection

If you have not already done so, create a new Cassandra connection by clicking From Cassandra on the ribbon.

Set the Server, Port, and Database connection properties to connect to Cassandra. Additionally, to use internal authentication set the User and Password connection properties.

Retrieve Data from Cassandra

To insert data into Cassandra, you will first need to retrieve data from the Cassandra table you want to add to. This links the Excel spreadsheet to the Cassandra table selected: After you retrieve data, any changes you make to the data are highlighted in red.

1. Click the From Cassandra button on the CData ribbon. The Data Selection wizard is displayed.
2. In the Table or View menu, select the Customer table.
3. In the Maximum Rows menu, select the number of rows you want to retrieve. If you want to insert rows, you need to retrieve only one row. The Query box will then display the SQL query that corresponds to your request.
4. In the Sheet Name box, enter the name for the sheet that will be populated. By default the add-in will create a new sheet with the name of the table.

Insert Rows to Cassandra

After retrieving data, you can add data from an existing spreadsheet in Excel.

1. In a cell after the last row, enter a formula referencing the corresponding cell from the other spreadsheet; for example, =MyCustomerSheetInExcel!A1.
2. After using a formula to reference the cells you want to add to Cassandra, select the cells that you are inserting data into and drag the formula down as far as needed. The referenced values you want to add will be displayed on the Customer sheet.
3. Highlight the rows you want to insert and click the Update Rows button.

As each row is inserted, the Id value will appear in the Id column and the row's text will change to black, indicating that the record has been inserted.