# ANSI SQL Compatibility of ClickHouse SQL Dialect {#ansi-sql-compatibility-of-clickhouse-sql-dialect}
!!! note "Note"
This article relies on Table 38, “Feature taxonomy and definition for mandatory features”, Annex F of ISO/IEC CD 9075-2:2013.
This article relies on Table 38, “Feature taxonomy and definition for mandatory features”, Annex F of [ISO/IEC CD 9075-2:2011](https://www.iso.org/obp/ui/#iso:std:iso-iec:9075:-2:ed-4:v1:en:sec:8).
## Differences in Behaviour {#differences-in-behaviour}
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@@ -77,6 +77,16 @@ The following table lists cases when query feature works in ClickHouse, but beha
| E071-05 | Columns combined via table operators need not have exactly the same data type | Yes{.text-success} | |