ETL Actions: Edit Columns: Set Column Type
As stated in the knowledge base (https://knowledge.domo.com/Prepare/Magic_Transforms/ETL_DataFlows/02ETL_Actions%3A_Edit_Columns), the definition for the Data Type "Decimal (Fixed)" reads as follows: "Contains decimal numbers with a fixed number of digits after the decimal point".
The definition does little to clarify the data type. I am left with a large array of questions, and I can't find further documentation. Below is a short list of key items:
1. What is the precision of this data type? (Two decimal places? Three? Five? Perhaps the max precision of all decimals in the column?)
2. Is the decimal truncated or rounded?
2a. If rounded, what method of rounding is used?
Thank you.
Best Answer

Hiya,
The first screenshot shows the data in raw form entered into a webform.
Column 1 is deliberately set to have an insane amount of decimals.
Column 4 is set to show the rounding behavior based on the data type.
In magic ETL, I converted each column into Whole, Fixed, Decimal.
Then in Analyser, I set the column to a number and the max decimal places I can set is 6.
You can observe the rounding behavior from the screenshot, or if you wish, perform the same exercise using different numbers to answer your questions ?
Hope that helps !
0
Answers

Hiya,
The first screenshot shows the data in raw form entered into a webform.
Column 1 is deliberately set to have an insane amount of decimals.
Column 4 is set to show the rounding behavior based on the data type.
In magic ETL, I converted each column into Whole, Fixed, Decimal.
Then in Analyser, I set the column to a number and the max decimal places I can set is 6.
You can observe the rounding behavior from the screenshot, or if you wish, perform the same exercise using different numbers to answer your questions ?
Hope that helps !
0 
So decimal fixed appears to go to 5 places and rounds up. Thank you for running this test. Is there a method to truncate or round to 2 decimal places in ETL?
0 
I often use the SQL to do my ETL work as I get more flexibility ?
Original data in Column 4 has 2decimal places. So rounding it to 2 decimal places has no effect.
Column 5 has 3 dp. As you can see below. using a round() and truncate() changes the number.
0
Categories
 All Categories
 1.6K Product Ideas
 1.6K Ideas Exchange
 1.5K Connect
 1.2K Connectors
 286 Workbench
 4 Cloud Amplifier
 7 Federated
 2.8K Transform
 91 SQL DataFlows
 585 Datasets
 2.1K Magic ETL
 3.6K Visualize
 2.4K Charting
 649 Beast Mode
 37 App Studio
 33 Variables
 634 Automate
 161 Apps
 432 APIs & Domo Developer
 39 Workflows
 2 DomoAI
 31 Predict
 12 Jupyter Workspaces
 19 R & Python Tiles
 377 Distribute
 107 Domo Everywhere
 266 Scheduled Reports
 4 Software Integrations
 104 Manage
 101 Governance & Security
 6 Domo University
 21 Product Releases
 Community Forums
 39 Getting Started
 29 Community Member Introductions
 93 Community Announcements
 4.8K Archive