Search Articles — Sudonull

https://sudonull.com/special-clickhouse-engines-when-mergetree-is-not-needed

Overview of ClickHouse Memory, Buffer, Null, Log, URL, S3, and PostgreSQL Engines. Examples for coefficient cache, buffering inserts from Kafka, and live data from external databases.

https://sudonull.com/clickhouse-materialized-views-triggers-on-insert

How MV work in ClickHouse: incremental aggregation, chains minute→hour→day, Null+Kafka pattern, POPULATE and its dangers. Examples with SummingMergeTree and AggregatingMergeTree.

NULL Definition & Meaning - Merriam-Webster

https://www.merriam-webster.com/dictionary/null

Null often pops up in legal and scientific contexts; it was originally used in Scottish law and still carries the meaning "having no legal …

Null - The Broken Script Wiki

https://thebrokenscript.wiki.gg/wiki/Null

Null is a humanoid entity that possesses the same model as the player, with a homogeneous pitch-black skin. Null will join the game …

Null - Glossary - MDN

https://developer.mozilla.org/en-US/docs/Glossary/Null

Jul 11, 2025 · In computer science, a null value represents a reference that points, generally intentionally, to a nonexistent or invalid …

Null - Wikipedia

https://en.wikipedia.org/wiki/Null

Null character, the zero-valued ASCII character, also designated by NUL, often used as a terminator, separator or filler. This symbol …

What Is Null? - Computer Hope

https://www.computerhope.com/jargon/n/null.htm

Sep 7, 2025 · The concept of null and its significance in computing with our comprehensive definition, examples, and explanations. …

What Is a Null Hypothesis? Definition and Examples

https://scienceinsights.org/what-is-a-null-hypothesis-definition-and-examples/

Mar 10, 2026 · Learn what a null hypothesis is, how it works in research, and why scientists “fail to reject” rather than “accept” it — …

SQL NULL Values - IS NULL and IS NOT NULL - W3Schools

https://www.w3schools.com/sql/sql_null_values.asp

A NULL value represents an unknown, missing, or inapplicable data in a database field. It is not a value itself, but a placeholder to …

SQL COALESCE (), IFNULL (), ISNULL (), NVL () Functions

https://www.w3schools.com/sql/sql_isnull.asp

Note: A NULL value represents an unknown or missing data in a database field. It is not a value itself, but a placeholder to indicate …

c# - What does null! statement mean? - Stack Overflow

https://stackoverflow.com/questions/54724304/what-does-null-statement-mean

Feb 16, 2019 · It can be used on a type to control Nullability, it is then called the "Null Forgiving Operator". Basically, null! applies the ! …

Null Definition - What does null mean to a computer?

https://techterms.com/definition/null

Sep 26, 2022 · In the context of programming languages, a variable that has no value assigned is considered null. It may have been …