Jul 27, 2015 · isnull(name,'') <> :name is shorthand for (name is null or name <> :name) (assuming that :name never contains the empty string, thus why shorthands like this can be bad). …

Sep 16, 2013 · What are the practical differences between COALESCE() and ISNULL(,'')? When avoiding NULL values in SQL concatenations, which one is the best to be used? Thanks!

Apr 25, 2017 · I understand the difference between these functions but my question is when checking for a single null value would ISNULL be any quicker than using COALESCE? e.g …

Feb 6, 2010 · I don't know what ISNULL you commenters are referring to, but field IS NULL gives a boolean value, while ISNULL in SQL Server operates like COALESCE: it returns one of the non- …

Nov 15, 2018 · Your query Isnull(something, 1) = 1 is saying to return something which has only null value with 1. I would re-write it as to make it Sargable :

Feb 10, 2017 · Using IsNull () in a WHERE clause Asked 8 years, 11 months ago Modified 6 years, 3 months ago Viewed 11k times

Dec 1, 2022 · I saw a sql code using the isNull function in the where clause, similar like below:date&gt;isNull(date1,date2) Can someone explain what this means? Many Thanks! …

Aug 19, 2010 · In SQL Server we can type IsNull() to determine if a field is null. Is there an equivalent function in PL/SQL?

Jun 14, 2023 · ISNULL() returns boolean value always, and it cannot return NULL. IFNULL() can return a value of any general type (MySQL uses the datatype which is the most common for …

SELECT IIF(field IS NULL, 1, 0) AS IsNull The same way you can check if field is empty.