Unable to convert SQL code to Quicksight dataset

Question

Hello ALL,

I have written a code on SQL ( through hubble) , that perfectly works .
But when I try to input the code into Quicksight it doesn't works. It gave me this error :  "failed to find conversion function from "unknow" to text "  and I don't succeed to resolve it.
Did somebody could help me with it please ?

Best regards

Answer

Hello.

The error message you're encountering, "failed to find conversion function from 'unknown' to text," typically indicates a data type mismatch or an issue with data conversion in Amazon QuickSight. Here are some steps you can take to troubleshoot and resolve this issue:

**Check Data Types:** Make sure that the data types in your SQL code match the expected data types in Amazon QuickSight. QuickSight is strict about data types, so if you're trying to use a field with an incompatible data type, you might encounter this error.

**Data Preparation in SQL:** Review the SQL code you've written in Hubble. Ensure that the SQL code is correctly casting or converting data types as needed before it is sent to QuickSight. For example, you may need to use CAST or CONVERT functions in SQL to explicitly change data types.

**Check for NULL Values:** If you're using fields that contain NULL values, make sure that your SQL code handles them properly. QuickSight can sometimes have trouble with NULL values, so you may need to use ISNULL or COALESCE functions in your SQL code to handle NULL values.

**Data Preview:** Use the data preview feature in QuickSight to inspect your data before creating visuals. This can help you identify any data type issues or unexpected values that may be causing the error.

**Data Source Configuration:** Check the configuration of your data source in Amazon QuickSight. Ensure that the field data types and formats match the expectations of your SQL code.

**Data Load Errors:** If you are loading data into QuickSight through a data source, check if there are any data load errors or issues with data ingestion. QuickSight may reject data that doesn't conform to expected data types.

**Syntax Errors:** Double-check your SQL code for any syntax errors or typos that could be causing issues when QuickSight tries to interpret it.

**Version Compatibility:** Verify that your version of Amazon QuickSight is compatible with the SQL syntax you are using. Sometimes, newer versions of QuickSight may have changes in behavior.

Best regards, Andrii

Unable to convert SQL code to Quicksight dataset

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