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Update functions.md
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@ -1,13 +1,30 @@
---
machine_translated: true
machine_translated_rev: 5decc73b5dc60054f19087d3690c4eb99446a6c3
---
# system.functions {#system-functions}
# 系统。功能 {#system-functions}
包含有关正常函数和聚合函数的信息。
包含有关常规函数和聚合函数的信息。
列:
- `name`(`String`) – The name of the function.
- `is_aggregate`(`UInt8`) — Whether the function is aggregate.
**举例**
```
SELECT * FROM system.functions LIMIT 10;
```
```
┌─name─────────────────────┬─is_aggregate─┬─case_insensitive─┬─alias_to─┐
│ sumburConsistentHash │ 0 │ 0 │ │
│ yandexConsistentHash │ 0 │ 0 │ │
│ demangle │ 0 │ 0 │ │
│ addressToLine │ 0 │ 0 │ │
│ JSONExtractRaw │ 0 │ 0 │ │
│ JSONExtractKeysAndValues │ 0 │ 0 │ │
│ JSONExtract │ 0 │ 0 │ │
│ JSONExtractString │ 0 │ 0 │ │
│ JSONExtractFloat │ 0 │ 0 │ │
│ JSONExtractInt │ 0 │ 0 │ │
└──────────────────────────┴──────────────┴──────────────────┴──────────┘
10 rows in set. Elapsed: 0.002 sec.
```