add 3051

Author: fishercoder1534

Diff for: database/_3051.sql

@@ -0,0 +1,4 @@
+-- Write your PostgreSQL query statement below
+select candidate_id from Candidates
+where skill in ('Python', 'Tableau', 'PostgreSQL') group by 1
+having count(candidate_id) = 3 order by 1

Diff for: paginated_contents/database/README.md

@@ -4,6 +4,7 @@
 | 3172 |[Second Day Verification](https://leetcode.com/problems/second-day-verification/)| [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_3172.sql)                                || Easy |
 | 3150 |[Invalid Tweets II](https://leetcode.com/problems/invalid-tweets-ii/)| [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_3150.sql)                                || Easy |
 | 3059 |[Find All Unique Email Domains](https://leetcode.com/problems/find-all-unique-email-domains/)| [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_3159.sql)                                || Easy |
+| 3051 |[Find Candidates for Data Scientist Position](https://leetcode.com/problems/find-candidates-for-data-scientist-position/)| [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_3151.sql)                                || Easy |
 | 2990 |[Loan Types](https://leetcode.com/problems/loan-types/)| [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_2990.sql)                                || Easy |
 | 2205 |[The Number of Users That Are Eligible for Discount](https://leetcode.com/problems/the-number-of-users-that-are-eligible-for-discount/)| [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_2205.sql)                                || Easy |
 | 2082 |[The Number of Rich Customers](https://leetcode.com/problems/the-number-of-rich-customers/)| [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/database/_2082.sql)                                || Easy |