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This article mainly introduces what is the complete execution order of SQL Select statements. It is very detailed and has certain reference value. Friends who are interested must read it!

The complete execution order of the SQL Select statement:

1. From clause assembles data from different data sources

2. The where clause filters record rows based on the specified criteria

3. The group by clause divides the data into multiple groups

4. Use the aggregation function to calculate

5. Use the having clause to filter the grouping

6. Evaluate all expressions

7. Select set output

Use order by to sort the result set.

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