The answer would be Tim Berners- lee
The number of records or rows in a table using MySQL can be got by using the COUNT statement.
Explanation:
- To counts all of the rows in a table, whether they contain NULL values or not, use COUNT
- That form of the COUNT() function basically returns the number of rows in a result set returned by a SELECT statement
- The SQL COUNT() function returns the number of rows in a table satisfying the criteria specified in the WHERE clause.
- It sets the number of rows or non NULL column values.
- COUNT() returns 0 if there were no matching rows.
- The SQL COUNT function is an aggregate function that returns the number of rows returned by a query. You can use the COUNT function in the SELECT statement to get the number of employees, the number of employees in each department, the number of employees who hold a specific job, etc.
**Formula
If u want to calculate voltage:
Current x Resistance
so the answer is D
Current:
Voltage ÷ Resistance
Resistance:
Voltage ÷ Current
A circuit-switched network would be more appropriate for this application.
<u>Explanation</u>:
The method of Circuit switching helps in the establishment of a network with the nodes that are in communication. The network will be established in the earlier stages before the two nodes starts to communicate with each other. The bandwidth that is essential fro the communication will be reserved and the communication will take place without any interruption.
The example that is given in the question requires a circuit switched network suiting its need. This is because long sessions are essential and there are some needs of bandwidth too. Circuit switched networks helps in this scenario reserving bandwidth for each session of the application and there wont be any wastage. There is also an advantage of ignoring he costs that are related with the setting and disconnecting the circuit connection even if an application has a session with longer time duration.
