HackerRank MySQL - SQL Project Planning
You are given a table, Projects, containing three columns: Task_ID, Start_Date and End_Date. It is guaranteed that the difference between the End_Date and the Start_Date is equal to 1 day for each row in the table.
- SELECT START_DATE, MIN(END_DATE)
- FROM
- (SELECT START_DATE
- FROM PROJECTS
- WHERE START_DATE NOT IN
- (SELECT END_DATE
- FROM PROJECTS)) A,
- (SELECT END_DATE
- FROM PROJECTS
- WHERE END_DATE NOT IN
- (SELECT START_DATE
- FROM PROJECTS)) B
- WHERE START_DATE < END_DATE
- GROUP BY START_DATE
- ORDER BY (MIN(END_DATE) - START_DATE), START_DATE;
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