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SQL practices ===
### ToC
- [Practice 1](#practice-1) - [Practice 2](#practice-2) - [Practice 3](#practice-3)
# Practice 1
- Count the number of subordinate 'ENTERPRISE\_CUSTOMER' organizations for each organization.
# Practice 2
- Calculate the center of each `japan_segment`.
# Practice 3
- Select `japan_segments` within the bounds represented as the following GeoJSON.
```json { "type": "FeatureCollection", "features": [ { "type": "Feature", "properties": {}, "geometry": { "type": "Polygon", "coordinates": [ [ [ 130.27313232421875, 30.519681272749402 ], [ 131.02020263671875, 30.519681272749402 ], [ 131.02020263671875, 30.80909017893796 ], [ 130.27313232421875, 30.80909017893796 ], [ 130.27313232421875, 30.519681272749402 ] ] ] } } ] } ```
![Kagoshima segments](./img/kagoshima_segments.png)
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