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26 lip 2013 · You need to select one type or the other for the field, the field type can't vary by row. The simplest is to remove the ELSE '-' and let it implicitly get the value NULL instead for the second case.
26 paź 2018 · The Jet/ACE SQL dialect does support IS NULL. However, as your current results suggest, empty strings ('') are not the same as the NULL entity. This is especially true in Excel (a non-database application where empty cells may not default to NULL).
11 lip 2012 · Is there any better way to write the lines below in SQL Server 2005? CASE WHEN (ID IS NULL) THEN 'YES' WHEN (ID IS NOT NULL) THEN 'NO' END AS ID_Value,
9 kwi 2022 · Solved: Hello, I need to combine 2 columns based on if one of them is NULL. I will say it in English: if [Name_FBL1N_Stampli] is Null then use.
The SQL CASE Expression. The CASEexpression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSEclause.
14 maj 2023 · In this article, we show you how you can check and test for null values in Power Query. This can be useful if you want to create a custom column and return a certain value if a cell is null, rather than replacing null values. We cover how you can easily mimic IsBlank and IsNull.
There are 3 possible ways to deal with nulls in expressions: using IsNull, Coalesce or CASE. I've explained these under separate headings below! The ISNULL Function. This function substitutes a given value when a column is null. The syntax is:
