SQL query tree, through the parent node to himself and all the data at a lower level-CodePudding

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SQL query tree, through the parent node to himself and all the data at a lower level

Time：09-27

By how SQL statements by the parent node to me and my son all of the data, it is best not to function, is the SQL statement, thank you!

CodePudding user response:

Cte recursion, it is very common