leetcode

5 Database Problems

6 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/ Problems/0620.sql b/ Problems/0620.sql

@@ -0,0 +1,4 @@

SELECT *

FROM Cinema

WHERE id % 2 = 1 AND description != 'boring'

ORDER BY rating DESC

diff --git a/ Problems/1075.sql b/ Problems/1075.sql

@@ -0,0 +1,5 @@

SELECT project_id, ROUND(AVG(experience_years), 2) AS average_years

FROM Project P

LEFT JOIN Employee E

ON P.employee_id = E.employee_id

GROUP BY project_id

diff --git a/ Problems/1211.sql b/ Problems/1211.sql

@@ -0,0 +1,6 @@

SELECT query_name,

ROUND(AVG(rating / position), 2) AS quality,

ROUND(AVG(rating < 3) * 100, 2) AS poor_query_percentage

FROM Queries

WHERE query_name IS NOT NULL

GROUP BY query_name

diff --git a/ Problems/1251.sql b/ Problems/1251.sql

@@ -0,0 +1,6 @@

SELECT P.product_id, IFNULL(ROUND(SUM(price * units) / SUM(units), 2), 0) AS average_price

FROM Prices P

LEFT JOIN UnitsSold U

ON P.product_id = U.product_id AND

purchase_date BETWEEN start_date AND end_date

GROUP BY P.product_id

diff --git a/ Problems/1633.sql b/ Problems/1633.sql

@@ -0,0 +1,5 @@

SELECT contest_id, ROUND(COUNT(user_id) / (SELECT COUNT(user_id) FROM Users) * 100, 2) AS percentage

FROM Register R

GROUP BY contest_id

ORDER BY percentage DESC, contest_id

diff --git a/ README.md b/ README.md

@@ -362,6 +362,7 @@ for solving problems. | 0606 | Easy | [Construct String from Binary Tree ](Problems/0606.cpp) | | 0609 | Medium | [Find Duplicate File in System](Problems/0609.cpp) | | 0617 | Easy | [Merge Two Binary Trees](Problems/0617.cpp) |

| 0620 | Easy | [Not Boring Movies](Problems/0620.cpp) |

| 0621 | Medium | [Task Scheduler](Problems/0621.cpp) | | 0623 | Medium | [Add One Row to Tree](Problems/0623.cpp) | | 0636 | Medium | [Exclusive Time of Functions](Problems/0636.cpp) |

@@ -531,6 +532,7 @@ for solving problems. | 1068 | Easy | [Product Sales Analysis I](Problems/1068.cpp) | | 1071 | Easy | [Greatest Common Divisor of Strings](Problems/1071.cpp) | | 1072 | Medium | [Flip Columns For Maximum Number of Equal Rows](Problems/1072.cpp) |

| 1075 | Easy | [Project Employees I](Problems/1075.cpp) |

| 1079 | Medium | [Letter Tile Possibilities](Problems/1079.cpp) | | 1081 | Medium | [Smallest Subsequence of Distinct Characters](Problems/1081.cpp) | | 1089 | Easy | [Duplicate Zeros](Problems/1089.cpp) |

@@ -563,6 +565,7 @@ for solving problems. | 1203 | Hard | [Sort Items by Groups Respecting Dependencies](Problems/1203.cpp) | | 1207 | Easy | [Unique Number of Occurrences](Problems/1207.cpp) | | 1209 | Medium | [Remove All Adjacent Duplicates in String II](Problems/1209.cpp) |

| 1211 | Easy | [Queries Quality and Percentage](Problems/1211.cpp) |

| 1218 | Medium | [Longest Arithmetic Subsequence of Given Difference](Problems/1218.cpp) | | 1219 | Medium | [Path with Maximum Gold](Problems/1219.cpp) | | 1220 | Hard | [Count Vowels Permutation](Problems/1220.cpp) |

@@ -575,6 +578,7 @@ for solving problems. | 1247 | Medium | [Minimum Swaps to Make Strings Equal](Problems/1247.cpp) | | 1248 | Medium | [Count Number of Nice Subarrays](Problems/1248.cpp) | | 1249 | Medium | [Minimum Remove to Make Valid Parentheses](Problems/1249.cpp) |

| 1251 | Easy | [Average Selling Price](Problems/1251.cpp) |

| 1254 | Medium | [Number of Closed Islands](Problems/1254.cpp) | | 1261 | Medium | [Find Elements in a Contaminated Binary Tree](Problems/1261.cpp) | | 1266 | Easy | [Minimum Time Visiting All Points](Problems/1266.cpp) |

@@ -709,6 +713,7 @@ for solving problems. | 1626 | Medium | [Best Team With No Conflicts](Problems/1626.cpp) | | 1630 | Medium | [Arithmetic Subarrays](Problems/1630.cpp) | | 1631 | Medium | [Path With Minimum Effort](Problems/1631.cpp) |

| 1633 | Easy | [Percentage of Users Attended a Contest](Problems/1633.cpp) |

| 1637 | Medium | [Widest Vertical Area Between Two Points Containing No Points](Problems/1637.cpp) | | 1638 | Medium | [Count Substrings That Differ by One Character](Problems/1638.cpp) | | 1639 | Hard | [Number of Ways to Form a Target String Given a Dictionary](Problems/1639.cpp) |