Postgresql SQL Joins – Inner | Left | Right | Full Join

TABLE DETAILS Tables used for explaining Postgresql joins are : Courses, Subjects and Students JOIN QUERIES? By providing a table name to a select query, you can access one table at a time. “select * from <<tablename (i.e courses)>>;” as an example. What if you need to extract information from several tables? Select queries can …

How to rename columns in the Python Pandas Library?

How to rename one or multiple columns using python pandas?

There are several ways to change the name of columns in a Python pandas data frame or series. In your Python script, import the pandas library and read a file. We will read a csv file and rename the columns contained within it. Method 1: Rename the columns or index of a data frame using …