maropu commented on a change in pull request #29837:
URL: https://github.com/apache/spark/pull/29837#discussion_r502787171
##########
File path: docs/sql-ref-datatypes.md
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@@ -314,3 +314,128 @@ SELECT COUNT(*), c2 FROM test GROUP BY c2;
| 3| Infinity|
+---------+---------+
```
+
+### Type conversion
+
+In general, an expression can contain different data types, type conversion is
the transformation of some data types into others in order to solve the
expressions.
+Spark supports both implicit conversions by type coercion and explicit
conversions by explicit casting and store assignment casting.
+
+#### Type coercion in operations between different types
Review comment:
`Type coercion in operations between different types ` -> `Type Coercion
in Operations between Different Types `
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