What goes here: Lookup material. Exhaustive, factual documentation of ClickHouse's surface area — SQL statements, functions, operators, data types, table engines, formats, settings, system tables.
Audience: Users who already know what they want to do and need the precise syntax, arguments, defaults, or behavior. Pages here are for skimming and cross-referencing, not reading start-to-finish.
Subdirectories:
statements/— SQL statements (SELECT, ALTER, CREATE, etc.).functions/— regular, aggregate, table, and window functions.operators/— SQL operators.data-types/— type reference.engines/— table and database engines.formats/— input/output format reference.settings/— server, session, and MergeTree settings.system-tables/— system table schemas.
If a page explains why you'd use something or walks through how to use it,
it belongs in /concepts or /guides respectively, not here.