LEFT JOIN: This type of join returns all the records (rows) from the left table and the matched records (rows) from the right table. When the fields of right table do not match with the left one, then the fields are filled with “NULL” values. Syntax: SELECT column_Name(s) FROM table_Name1 RIGHT JOIN table_Name2 ON table_Name1.column_Name = table_Name2.column_Name; In the above syntax, the left table is “table_Name1” and the right table is “table_Name2”. ORDER BY Clause: SQL contains “ORDER BY” clause in order to sort rows. The values get sorted in ascending as well as descending order. The keyword used to sort values in ascending order is “ASC” and for descending order is “DESC”. By default, it sorts values by ascending order. Syntax: SELECT column_Name1, column_Name2 FROM table_Name ORDER BY column_Name2;

Question

Dijkstra's Algorithm (part 1). Consider the network shown below, and Dijkstra’s link-state algorithm. Here, we are interested in computing the least cost path from node E (note: the start node here is E) to all other nodes using Dijkstra's algorithm. Using the algorithm statement used in the textbook and its visual representation, complete the "Step 0" row in the table below showing the link state algorithm’s execution by matching the table entries (i), (ii), (iii), and (iv) with their values. Write down your final [correct] answer, as you‘ll need it for the next question.

Answer 1

Question

Chapter 5, Problem 16CAT

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LEFT JOIN:

This type of join returns all the records (rows) from the left table and the matched records (rows) from the right table.

When the fields of right table do not match with the left one, then the fields are filled with “NULL” values.

Syntax:

SELECT column_Name(s) FROM table_Name1 RIGHT JOIN table_Name2 ON table_Name1.column_Name = table_Name2.column_Name;

In the above syntax, the left table is “table_Name1” and the right table is “table_Name2”.

ORDER BY Clause:

SQL contains “ORDER BY” clause in order to sort rows. The values get sorted in ascending as well as descending order. The keyword used to sort values in ascending order is “ASC” and for descending order is “DESC”. By default, it sorts values by ascending order.

Syntax:

SELECT column_Name1, column_Name2 FROM table_Name ORDER BY column_Name2;

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Dijkstra's Algorithm (part 1). Consider the network shown below, and Dijkstra’s link-state algorithm. Here, we are interested in computing the least cost path from node E (note: the start node here is E) to all other nodes using Dijkstra's algorithm. Using the algorithm statement used in the textbook and its visual representation, complete the "Step 0" row in the table below showing the link state algorithm’s execution by matching the table entries (i), (ii), (iii), and (iv) with their values. Write down your final [correct] answer, as you‘ll need it for the next question.

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