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Update 3.upsert-edge.md
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foesa-yang authored Feb 13, 2023
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`UPSERT EDGE`性能远低于`INSERT`,因为`UPSERT`是一组分片级别的读取、修改、写入操作。

!!! danger

禁止在高并发写操作的情况下使用`UPSERT`语句,请使用`UPDATE`或`INSERT`代替。
!!! caution

并发`UPSERT`同一个 TAG 或 EDGE TYPE 会报错。
## 语法

```ngql
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