A composite primary key<span> is a set of several primary </span>keys<span> that, together, uniquely identifies each record.</span>
Primary keys are used as identifiers of composite entities. In this case each primary key combination is allowed only once in the *:* relationship.
Other case where primary keys are used is as identifiers of weak entities, where the weak entity has a strong identifying relationship with the parent entity.
Answer:
A) Parentheses
Explanation:
Conditional statements control behavior in JavaScript and determine whether or not pieces of code can run.
There are multiple different types of conditionals in JavaScript including:
If” statements: where if a condition is true it is used to specify execution for a block of code.
“Else” statements: where if the same condition is false it specifies the execution for a block of code.
“Else if” statements: this specifies a new test if the first condition is false.
Now that you have the basic JavaScript conditional statement definitions, let’s show you examples of each.
If Statement Example
As the most common type of conditional, the if statement only runs if the condition enclosed in parentheses () is truthy.
EXAMPLE
if (10 > 5) {
var outcome = "if block";
}
outcome;
OUTPUT
"if block"
Here’s what’s happening in the example above:
The keyword if tells JavaScript to start the conditional statement.
(10 > 5) is the condition to test, which in this case is true — 10 is greater than 5.
The part contained inside curly braces {} is the block of code to run.
Because the condition passes, the variable outcome is assigned the value "if block".
THe staff of the medical office will need to enter, maintain and retrieve data from electronic health records within a hospital. EHR is the term used which means electronic health records that recorded all the health data of the hospitals.
Answer: must have public properties that match the names of the bound fields
Explanation:
When a business class is used with an object data source, the business class must have public properties that match the names of the bound fields.
Having an attribute which match the names of the bound fields isn't necessary as well as having a constructor with parameters that match the names of the bound fields
Therefore, the correct option is B.
Answer:
Swapping two numbers means exchange the values of two variables with each other.
