SELECT *
FROM ( SELECT grouped field names,
ROW_NUMBER() OVER(PARTITION BY grouped field name ORDER BY sorted field name) AS RN
FROM table name)
WHERE RN <= 10 After grouping, the first few pieces of data
SELECT *
FROM ( SELECT grouped field names,
ROW_NUMBER() OVER(PARTITION BY grouped field name ORDER BY sorted field name) AS RN
FROM table name)
WHERE RN <= 10 After grouping, the first few pieces of data