Learn By Example
Python
R
SQL
Learn SQL By Example
Start from basic level and move all the way up to professional references
Retrieving Data
SQL SELECT Statement
SQL SELECT DISTINCT Statement
Filtering Data
SQL WHERE Clause
SQL AND, OR, NOT Operators
SQL BETWEEN Operator
SQL IN Operator
SQL LIKE Operator
Sorting Data
SQL ORDER BY Clause
Grouping and Summarizing Data
SQL Aggregate Functions
SQL GROUP BY Statement
SQL HAVING Clause
Modifying Data
SQL INSERT INTO Statement
SQL INSERT SELECT Statement
SQL SELECT INTO Statement
SQL UPDATE Statement
SQL DELETE Statement