What are the two subtypes of the if condition statement in PL SQL?

What are the conditional statements in PL SQL?

PL/SQL categories of control statements are: Conditional selection statements, which run different statements for different data values. The conditional selection statements are IF and CASE .

Conditional Selection Statements

  • IF THEN.
  • IF THEN ELSE.
  • IF THEN ELSIF.

How many else clauses can an if statement have in PL SQL?

An IF statement can have any number of ELSIF clauses; the final ELSE clause is optional. Boolean expressions are evaluated one by one from top to bottom. If any expression returns TRUE , its associated sequence of statements is executed and control passes to the next statement.

What are the two variable supported by PL SQL?

Variable Scope in PL/SQL:

There are two types of variable scope: Local Variable: Local variables are the inner block variables which are not accessible to outer blocks. Global Variable: Global variables are declared in outermost block.

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What are the different conditional control statements?

Conditional statements help you to make a decision based on certain conditions. These conditions are specified by a set of conditional statements having boolean expressions which are evaluated to a boolean value true or false.

Where do you declare variables in PL SQL procedures?

PL/SQL variables must be declared in the declaration section or in a package as a global variable. When you declare a variable, PL/SQL allocates memory for the variable’s value and the storage location is identified by the variable name.

How many types of unconditional statements are there?

In C Programming Language, There are four types of unconditional control transfer statements.

Can we use else if in Plsql?

Syntax (IF-THEN-ELSE)

The syntax for IF-THEN-ELSE in Oracle/PLSQL is: IF condition THEN {… statements to execute when condition is TRUE…} ELSE {… … You use the IF-THEN-ELSE syntax, when you want to execute one set of statements when condition is TRUE or a different set of statements when condition is FALSE.

How many else clauses can an if statement have?

When you want to define more than two blocks of statements, use the ElseIf Statement. You can nest up to ten levels of If… Then… Else statements. If you need to create an expression with more than ten levels, you must redefine it using the ElseIf statement or the Select Case…

Does SQL have else if?

Else statement in SQL Server. In MS SQL, IF…ELSE is a type of Conditional statement. Any T-SQL statement can be executed conditionally using IF… ELSE. If the condition evaluates to True, then T-SQL statements followed by IF condition in SQL server will be executed.

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What is variable and constant in PL SQL?

A constant is a value used in a PL/SQL block that remains unchanged throughout the program. It is a user-defined literal value. It can be declared and used instead of actual values. … Next time if you want to increase the salary again you can change the value of constant than the actual value throughout the program.

Which identifier is valid in PL SQL?

You can use uppercase, lowercase, or mixed case to write identifiers. PL/SQL is not case-sensitive except within string and character literals. Every character, including dollar signs, underscores, and number signs, is significant.

What is procedure in PL SQL with example?

Procedure Vs. Function: Key Differences

Procedure Function
Used mainly to a execute certain process Used mainly to perform some calculation
Cannot call in SELECT statement A Function that contains no DML statements can be called in SELECT statement
Use OUT parameter to return the value Use RETURN to return the value

What is an example of a conditional statement?

A conditional statement consists of two parts, a hypothesis in the “if” clause and a conclusion in the “then” clause. For instance, “If it rains, then they cancel school.” “It rains” is the hypothesis. “They cancel school” is the conclusion.

What are four basic conditional controls?

There are four types of control statements in C: Decision making statements. Selection statements. Iteration statements.

What is nested IF statement?

Nested IF functions, meaning one IF function inside of another, allow you to test multiple criteria and increases the number of possible outcomes.

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