查詢語法錯誤排除NULL值

Question

我試圖運行下面的代碼，但不斷收到

運行時錯誤3075語法錯誤在查詢表達式：CCC在（686200，681400）和[上一頁適用範圍]不爲空

的代碼是

DB.CreateQueryDef queryName, "SELECT * FROM HRCC WHERE CCC In (" & costCentres & ") And [Previous Scope] " & IIf(newStaff, "Is Null", "Not Is Null") 

Answer 1

... [Previous Scope] NOT IS NULL確實是不正確的語法。

正確的語法是... [Previous Scope] IS NOT NULL。