How to solve the problem of SQL?

Encountered before explain It's all this ：

This time it is ：

This time mysql The version is 5.7.25-TiDB-v4.0.8
Please give advice or comments ,explain Can you change it yourself ？

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Take the answer ：

mysql and TiDB There's a difference , There are differences in grammar .

MYSQL And TiDB Implementation plan of _zl325118 The blog of -CSDN Blog _tidb Implementation plan The foreword here adopts tpc-h The amount of data in a database is used to compare query plans . With the help of tpc-h Medium 22 Query statements for execution plan analysis .mysql It's a standard installation ,TiDB Using a stand-alone test version , The performance results here cannot explain the performance difference. The main purpose of this article is to compare Mysql And TiDB In execution sql Query variance .mysql edition 5.7 TiDB edition v2.0.0-rc.4 Data import in preparation stage TiDB Then there is the lack of statistical information ...https://blog.csdn.net/zl325118/article/details/103766011

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