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LEFT JOIN (or LEFT OUTER JOIN): Returns all the rows from the left table (table1), and the matching rows from the right table (table2). The non-matching rows from the right table will be filled with NULL values.
RIGHT JOIN (or RIGHT OUTER JOIN): Returns all the rows from the right table (table2), and the matching rows from the left table (table1). The non-matching rows from the left table will be filled with NULL values.
FULL OUTER JOIN: Returns all the rows from both tables, with the matching rows combined and the non-matching rows filled with NULL values.
In each of these join types, the ON clause specifies the join condition, which defines the relationship between the two tables based on the values in a specific column.
This algorithm uses a single loop to iterate through the list, and keeps track of the largest and second largest values as it goes. It sets the first two elements as the largest and second largest initially, and then updates them as needed as it loops through the rest of the list. The time complexity of this algorithm is O(n), making it an optimal solution for finding the second largest element in a list.
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