https://github.com/h9lk/sql-learning

SQL training, correct problem solving
https://github.com/h9lk/sql-learning

hackerrank-solutions mssqlserver query-language sql sql-solution w3school-exercises-solutions

Last synced: 17 days ago
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SQL training, correct problem solving

• Host: GitHub
• URL: https://github.com/h9lk/sql-learning
• Owner: h9lk
• Created: 2021-07-09T10:12:03.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2021-09-07T13:33:03.000Z (over 3 years ago)
• Last Synced: 2024-11-17T19:49:34.820Z (3 months ago)
• Topics: hackerrank-solutions, mssqlserver, query-language, sql, sql-solution, w3school-exercises-solutions
• Language: TSQL
• Homepage:
• Size: 4.26 MB
• Stars: 1
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md

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README

        
# Sql learning progress

## Solutions to challenges on

- [x] [W3Schools](https://www.w3schools.com/sql/default.asp)

- [x] [SQL-Academy](https://sql-academy.org/en)

- [x] [SQL-Bolt](https://sqlbolt.com/)

- [x] [PostgreSQL Exercises](https://www.pgexercises.com/)

- [x] [HackerRank](https://www.hackerrank.com/domains/sql)

- [ ] [Codecademy](https://www.codecademy.com/catalog/language/sql)

- [ ] [Codewars](https://www.codewars.com/dashboard)

- [ ] [SQL-EX](https://sql-ex.ru/?Lang=1)

# Frequently used functions 

## Aggregate

* ```Avg```

* ```Count```

* ```Max```

* ```Min```

* ```Sum```

## Conversion

* ```Cast```

* ```Convert```

## Date & Time

* ```Datediff```

* ```Datepart```

## Expressions

* ```Case```

* ```Coalesce```

* ```Top```

* ```Limit```

* ```Distinct```

## Mathematical

* ```Ceiling```

* ```Floor```

* ```Sqrt```

* ```Power```

## Ranking

* ```Row_number```

* ```Rank```

## String 

* ```Concat```

* ```Len```

* ```Left```

* ```Ltrim```

* ```Lower```

* ```Replace```

* ```Right```

* ```Substring```