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Update weather-observation-station-5.md

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`@@ -3,6 +3,12 @@ https://www.hackerrank.com/challenges/weather-observation-station-5/problem?isFu`
`3`	`3`
`4`	`4`	`The text is a SQL query that asks for the two cities in a table named STATION with the shortest and longest names, and their respective lengths. The query also specifies that if there are ties, the city that comes first in alphabetical order should be selected.`
`5`	`5`
	`6`	+```sql
	`7`	`+(select city, length(city) from station order by length(city), city limit 1)`
	`8`	`+union`
	`9`	`+(select city, length(city) from station order by length(city) desc, city limit 1);`
	`10`	+```
	`11`	`+`
`6`	`12`	`--------------`
`7`	`13`
`8`	`14`	`There are different ways to write this query in SQL, depending on the database system and the syntax it supports. Here are some possible solutions:`

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