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题目大意：略。

解题思路：略。

相关企业

• 亚马逊（Amazon）

AC 代码

-- 解决方案(1)
SELECT e1.employee_id, cnt team_size
FROM Employee e1 JOIN (SELECT team_id, COUNT(*) cnt FROM Employee GROUP BY 1) e2 USING(team_id)

-- 解决方案(2)
SELECT
    employee_id,
    COUNT(employee_id) OVER(PARTITION BY team_id) AS team_size
FROM Employee