As a final topic, we added a simple command line query command.

在最后一步，我们添加了一个简单的命令行查询命令。

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The doPOST function expects the service query command, query input values, and a callback function to process the result returned from the services.

doPOST 函数使用服务查询命令、查询输入值及一个回调函数来处理从这些服务返回的结果。

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Query Explain Use EXPLAIN command to see the explain plan of a query.

查询解释 使用 EXPLAIN 命令查看查询的解释计划。

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