Commit 07a4821

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solve problem Rank Score

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`@@ -332,4 +332,5 @@ All solutions will be accepted!`
`332`	`332`	`\|197\|[Rising Temperature](https://leetcode-cn.com/problems/rising-temperature/description/)\|[mysql](./database/RisingTemperature)\|Easy\|`
`333`	`333`	`\|181\|[Employees Earning More Than Their Managers](https://leetcode-cn.com/problems/employees-earning-more-than-their-managers/description/)\|[mysql](./database/EmployeesEarningMoreThanTheirManagers)\|Easy\|`
`334`	`334`	`\|176\|[Second Highest Salary](https://leetcode-cn.com/problems/second-highest-salary/description/)\|[mysql](./database/SecondHighestSalary)\|Easy\|`
`335`		`-\|626\|[Exchange Seats](https://leetcode-cn.com/problems/exchange-seats/description/)\|[mysql](./database/ExchangeSeats)\|Medium\|`
	`335`	`+\|626\|[Exchange Seats](https://leetcode-cn.com/problems/exchange-seats/description/)\|[mysql](./database/ExchangeSeats)\|Medium\|`
	`336`	`+\|178\|[Rank Scores](https://leetcode-cn.com/problems/rank-scores/description/)\|[mysql](./database/RankScore)\|Medium\|`

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	`1`	`+# Rank Score`
	`2`	`+We can solve this problem by sub-query`

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	`1`	`+# Write your MySQL query statement below`
	`2`	`+select s.Score,`
	`3`	`+ (select count(distinct Score) from Scores where Score >= s.Score) as Rank`
	`4`	`+from Scores as s order by Score desc`

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