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How would you select 10 cities records for each country so that the query would be as fast as possible in Oracle database?

This is my table:

ID
CITY_NAME
COUNTRY_NAME
SIZE

asked 43 secs ago

برچسب: نویسنده: استخدام کار تاريخ: يکشنبه 7 شهريور 1395 ساعت: 23:47

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