Is your SQL drawing a blank? It’s NULL a surprise! The title of this post is a play on words, but very appropriate. We are going to discuss the inconsistent results, as well as performance ...

Learn how to optimize SQL queries for NULL values by following some best practices and techniques, such as using IS NULL or IS NOT NULL operators, avoiding NOT IN with NULL values, and more.

Spread the loveNULL in SQL is a powerful concept, representing the absence of a value. It’s used when data is unavailable or unknown, but its usage requires careful consideration. The first step is ...

-- at the time of importing the data mysql didnt took care of null values instead it recognize as empty string values -- so when running below code will not able to find the null value in each column ...

Null values indicate that data is missing or unknown, ... Excluding null values in a group . Jet SQL’s GROUP BY clause doesn’t eliminate null values from the grouped results.

Null means "undefined" in SQL, so numerous online services don't think Christopher Null exists. ... "Allowing NULL values makes you work extra hard to get the kind of data you are looking for.