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Update 1.overview.md #1713

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Apr 28, 2022
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Update 1.overview.md #1713

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14 changes: 11 additions & 3 deletions docs-2.0/3.ngql-guide/1.nGQL-overview/1.overview.md
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Expand Up @@ -96,11 +96,19 @@ nebula> CREATE TAG IF NOT EXISTS player(name string, age int);

不。

!!! compatibility "nGQL 部分兼容 openCypher 9 的 DQL"
!!! compatibility "openCypher 兼容性"

nGQL 设计目标为兼容部分 DQL（match）。不计划兼容任何 DDL，DML，DCL。
nGQL 设计目标仅为兼容部分的 DQL 语句(match, optional match, with等)。

不计划兼容任何 DDL，DML，DCL；

不计划兼容 Bolt 协议；

不计划兼容 APOC 与 GDS。

在 [Nebula Graph Issues](https://github.com/vesoft-inc/nebula/issues?q=is%3Aissue+is%3Aopen+label%3Aincompatible) 中已经列出已知的多处不兼容项。如果发现这种类型的新问题，请提交问题并附带`incompatible`标签。在本文搜索"compatibility"或者“兼容性”查看具体不兼容细节。
在本文搜索 "compatibility" 或者 “兼容性” 查看具体不兼容的细节。

在 [Nebula Graph Issues](https://github.com/vesoft-inc/nebula/issues?q=is%3Aissue+is%3Aopen+label%3Aincompatible) 中已经列出已知的兼容错误。如果发现这种类型的新问题，请提交问题并附带`incompatible`标签。


### nGQL 和 openCypher 9 的 主要差异有哪些？
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