create data_type_families.md

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@ -16,7 +16,7 @@ machine_translated_rev: 5decc73b5dc60054f19087d3690c4eb99446a6c3
**示例**
``` sql
SELECT * FROM system.data_type_families WHERE alias_to = 'String'
SELECT * FROM system.data_type_families WHERE alias_to = 'String';
```
``` text