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: 5 months 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 (almost 5 years ago)
- Default Branch: main
- Last Pushed: 2021-09-07T13:33:03.000Z (almost 5 years ago)
- Last Synced: 2025-01-18T13:56:29.351Z (over 1 year 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
Awesome Lists containing this project
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```