Introduction to SQLFlow Data Flow Chain

In this article, we will give a brief introduction to SQLFlow data flow chain.

If a result set of a subquery or CTE is used in the from clause of an upper statement, the effect of the lower result set will be transferred to the upper level.

In CTE, there is an influence relationship:

Since cteReports is used in the from clause of the upper statement, the impact will be as follows:

If the intermediate result set is ignored, the end-to-end data flow is:

Database icon:

Conclusion

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