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Update and rename asian-population.md to Population Census.md

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	`1`	`+`
	`2`	+# `Population Census`
	`3`	`+`
	`4`	`+https://www.hackerrank.com/challenges/asian-population/problem?isFullScreen=true`
	`5`	`+`
	`6`	`+<br>`
	`7`	`+`
	`8`	`+>Given the CITY and COUNTRY tables, query the sum of the populations of all cities where the CONTINENT is 'Asia'.`
	`9`	`+>`
	`10`	`+>Note: CITY.CountryCode and COUNTRY.Code are matching key columns.`
	`11`	`+`
	`12`	`+<br>`
	`13`	`+`
	`14`	+# `Input Format`
	`15`	`+`
	`16`	`+The CITY and COUNTRY tables are described as follows:`
	`17`	`+`
	`18`	`+![image](https://github.com/imvickykumar999/hackerrank-codechef-leetcode/assets/50515418/9b7e2233-6891-4c2d-908a-d923be3c6dc2)`
	`19`	`+`
	`20`	`+![image](https://github.com/imvickykumar999/hackerrank-codechef-leetcode/assets/50515418/2a41e18f-1f59-4ae1-842f-56e619bf069b)`
	`21`	`+`
	`22`	+# `Solution`
	`23`	`+`
	`24`	+```sql
	`25`	`+select sum(city.population) from city inner join country on city.countrycode = country.code where country.continent = 'Asia';`
	`26`	+```

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