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.
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Answer:
Computer hardware engineers oversee the manufacture, installation, and testing of computer systems, servers, chips, and circuit boards. They work with peripherals including keyboards, routers, and printers. Another title for this occupation is hardware engineer. Approximately 73,600 computer hardware engineers worked in the U.S. in 2016.
Explanation:
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Answer:
Explanation:
Given
--- starting index
Required
Change the starting index to
We have:
To change the starting index to k, we simply rewrite as:
<em>In this case; k=1; so, the starting index will be: </em><em />
Explanation:
Below is the java code for the class MotorBoat : -
public class MotorBoat {
private int tankCapacity;
private int fuelAmount;
private double maxBoatSpeed;
private double currentBoatSpeed;
private double efficacy;
private double distanceTravelled;
public void changeSpeed(double speed){
currentBoatSpeed = speed;
}
public double operateBoat(double time){
distanceTravelled = currentBoatSpeed * time;
return distanceTravelled;
}
}