How to Handle Errors in Date and Conditional Functions
When working with date functions or conditional functions, you may encounter an error message stating “Invalid parameter(s) used in the expression”. This typically occurs when the syntax used in the expression is incorrect. Here’s how to correct these errors.
Date Expressions
When creating expressions using date functions, it’s crucial to use the correct syntax. For instance, if you are trying to extract the month from a date, the syntax should be DATEPART("Month", [Dt]) instead of ‘MM’.
Incorrect syntax can lead to errors as the system may not recognize the command or interpret it as intended. Therefore, always refer to the Google Cloud BigQuery documentationfor the correct syntax related to date functions.
Conditional Expressions
In conditional expressions, it’s important to use single quotes to specify values. For example, the correct syntax would be IF([ga_usertype] = 'New Visitor', [eai_client_id], 0).
In conditional formatting, the ‘else’ value should match with the return column format. If it doesn’t, it can lead to errors as the system may not be able to process the mismatched data types.
By following these guidelines, you should be able to avoid the “Invalid parameter(s) used in the expression” error when creating expressions using date or conditional functions.
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