Sql error invalid use of null

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I have the same question Report abuse. Details required :. Cancel Submit. Albert D. Kallal MVP. So, you have to use a expression that converts the empty null to some string Try something like: Cstr nz [column name],"" This type of join will run quite slow. How satisfied are you with this reply? Thanks for your feedback, it helps us improve the site. Connect and share knowledge within a single location that is structured and easy to search.

I use a userform in Excel to run some internal queries between my spreadsheets. However I am getting Invalid Use of Null.

Casting functions, like CStr , are very prone to trigger Invalid use of null. There shouldn't be a need to use CStr in joins, as it will typecast to get equality. Note that, while you've filtered with Is Not Null in those subqueries, the optimizer might first do the join, then throw an Invalid Use Of Null , before filtering. See this answer for a sample case where the optimizer did something similar.

Appending an empty string to something casts its value to a string, even if it's Null, without throwing an error. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Collectives on Stack Overflow. Learn more. Why am I getting an "Invalid use of Nulls" error in my query? Ask Question. Asked 3 years, 8 months ago. Active 1 year, 6 months ago. Viewed 2k times. Improve this question. What about ISNull function? We'd need to see the SQL being executed against the database. I see two options; in each selected value in the outer most select wrap the field name in NZ fieldName,'' to ensure all nulls are handled there: 2 wrap each selected value in the inner queries in the NZ FieldName,'' to ensure nulls are handled there.

Might start with adding NZ here