Excel to Snowflake tutorial

This tutorial will walk you through the process of setting up a data workflow that moves data from an Excel spreadsheet to Snowflake.

Prerequisites

Excel

You will need to have a modern version of Excel installed on your system.

Install the Mycelial CLI

Follow the below instructions to install the Mycelial CLI:

Mac

brew install mycelial/tap/mycelial

Linux

Debian Based Linux x86_64

curl -L https://github.com/mycelial/cli/releases/latest/download/mycelial-v-1.x86_64.deb --output mycelial_amd64.deb
dpkg -i ./mycelial_amd64.deb

Debian Based Linux ARM64

curl -L https://github.com/mycelial/cli/releases/latest/download/mycelial-v-1.arm64.deb --output mycelial_arm64.deb
dpkg -i ./mycelial_arm64.deb

Debian Based Linux ARM

curl -L https://github.com/mycelial/cli/releases/latest/download/mycelial-v-1.armhf.deb --output mycelial_armhf.deb
dpkg -i ./mycelial_armhf.deb

Redhat Based Linux x86_64

yum install https://github.com/mycelial/cli/releases/latest/download/mycelial-v-1.x86_64.rpm 

Redhat Based Linux ARM64

yum install https://github.com/mycelial/cli/releases/latest/download/mycelial-v-1.arm64.rpm 

Redhat Based Linux ARM

yum install https://github.com/mycelial/cli/releases/latest/download/mycelial-v-1.armhf.rpm

Create a demo directory

mkdir excel-demo
cd excel-demo

Create an Excel file

Create a new Excel file and add the following data to the first worksheet:

Name	Age	Color
John	25	Blue
Jane	30	Red

Rename the worksheet to people.

Save the file as people.xlsx in the excel-demo directory.

Download, Configure and Start the Mycelial Control Plane and Daemon

Run the following Mycelial CLI command:

mycelial init --local

Running the above command will download both the control plane (control plane) and the daemon then you will be prompted with a series of questions. Press enter (⏎) to accept the default values as shown below:

? Daemon Name: (My Daemon)› ⏎
? Daemon ID: (daemon)› ⏎
? Control Plane: (http://localhost:7777) › ⏎

When prompted for the token, enter token:

? Security Token: › token ⏎

When prompted with What would you like to do?, press the down arrow to highlight Exit and press enter.

? What would you like to do? ›
❯ Add Source ⏎
  Add Destination
  Exit

When prompted with What type of source would you like to add?, press the down arrow to highlight Excel source and press return.

? What type of source would you like to add? ›
  Append only SQLite source
❯ Excel source ⏎
  Append only Postgres source
  Append only MySQL source
  File source
  Cancel

When prompted for the Display Name press return to accept the default name.

? Display name: (Excel Source) › ⏎

When prompted for the Excel Path enter people.xlsx and press return.

? Excel Path: (data.xlsx) › people.xlsx ⏎

When prompted for the Sheets, enter people and press return.

? Sheets: (*) › people ⏎

When prompted for Strict, enter n and press return.

? Strict: (y/n) › no

When prompted with What would you like to do?, press the down arrow key to highlight Add Destination then press return.

? What would you like to do? ›
  Add Source
❯ Add Destination ⏎
  Exit

When prompted with What type of destination would you like to add?, press the down arrow to hightlight Snowflake destination and press return.

? What type of destination would you like to add? ›
  Append only SQLite destination
  Append only Postgres destination
  Append only MySQL destination
  Kafka destination
❯ Snowflake destination ⏎
  File destination
  Cancel

When prompted for the Display Name press return to accept the default name.

? Display name: (Snowflake Destination) › ⏎

When prompted for the Snowflake username, enter your Snowflake username and press return.

? Snowflake username: › [username] ⏎

When prompted for the Snowflake password, enter your Snowflake password and press return.

? Snowflake password: › [password] ⏎

When prompted for the Snowflake role, enter your Snowflake role and press return.

? Snowflake role: › [role] ⏎

When prompted for the Snowflake account name, enter your Snowflake account name and press return.

? Snowflake account name: › [account123] ⏎

When prompted for the Snowflake organization name, enter your Snowflake organization name and press return.

? Snowflake organization name: › [myorg] ⏎

When prompted for the Snowflake warehouse, enter your Snowflake warehouse and

? Snowflake warehouse: › [warehouse] ⏎

When prompted for the Database name, enter your Snowflake database name and press return.

? Database name: › [database] ⏎

When prompted for the Schema, enter your Snowflake schema name and press return.

? Schema: › [schema] ⏎

When prompted with What would you like to do?, press the down arrow key to highlight Exit then press return.

? What would you like to do? ›
  Add Source
  Add Destination
❯ Exit ⏎

After exiting the Mycelial CLI, a config.toml file will be created in the current directory.

Start the Mycelial Control Plane and Daemon

Run the following command to start the Mycelial Control Plane and Daemon:

mycelial start

When prompted with Security Token:, enter token:

? Security Token: › token ⏎

Now navigate to the Mycelial Control Plane in your browser at http://localhost:7777.

When prompted for a username and password, enter token for for the username and leave the password field blank.

Create a data workflow

Now you'll need to create a data workflow by doing the following steps:

1. Drag and drop the Excel Source node onto the canvas.
2. Drag and drop the Mycelial Server node onto the canvas.
3. Drag and drop the Snowflake Destination node onto the canvas.
4. Connect the Excel Source to the Mycelial Server and then connect the Mycelial Server to the Snowflake Destination node.
5. Lastly, press the Publish button to start the workflow.

Verify the data was replicated

At this point, the people worksheet from the Excel source should be synchronized with the Snowflake destination database.

Cleanup

Stop the Mycelial Control Plane and Daemon

Run the following command to stop the Mycelial Control Plane and Daemon:

mycelial destroy