1)ISNULL function is regraded as Transact-SQL function. 2)This function is used to replace NULL with the replacement value specified in second argument or from from the input expression it returns ...

The ISNULL function in Google BigQuery is used to check if a value is null. It returns true if a value is null and false if a value is not null. The code above checks if the value of the column ...

> 原文:[https://www . geesforgeks . org/is numeric-and-is null-function in-ms-access/](https://www.geeksforgeeks.org/isnumeric-and-isnull-function-in-ms-access ...