Question

perform an inner join of countries as c (left) with populations as p (right), on code. select name, year and fertility rate.

Answer 1

The question involves performing an INNER JOIN on two tables, 'countries' and 'populations', and selecting specific columns: 'name', 'year', and 'fertility rate'. An SQL query is provided to retrieve the desired data where the 'code' is the matching field for the join.

Step-by-step explanation:

The student has asked to perform an inner join of two tables: 'countries' as alias 'c' and 'populations' as alias 'p', using the 'code' field as the join condition. The objective is to select the 'name' from the countries table, as well as 'year' and 'fertility rate' from the populations table. This task involves executing a SQL query to retrieve the desired data.

To accomplish this, you would use the following SQL statement:

SELECT c.name, p.year, p.fertility rateFROM countries AS cINNER JOIN populations AS pON c.code = p.code;

This query utilizes the INNER JOIN operation to combine rows from both tables where the join condition is met. It retrieves the 'name' from the countries table and the 'year' and 'fertility rate' from the populations table only for those entries with matching 'code' values in both tables.