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Update string-functions.md

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docs/ru/sql-reference/functions/string-functions.md
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@ -34,15 +34,15 @@ empty(x)
Запрос:
```sql
SELECT notempty('text');
SELECT empty('text');
```
Результат:
```text
┌─empty('')─┐
│ 1 │
└───────────┘
┌─empty('text')─┐
│ 0 │
└───────────────┘
```
## notEmpty {#notempty}