What is IF statement in PL SQL?

What is IF statement in PL SQL?

The PL/SQL IF statement allows you to execute a sequence of statements conditionally. The IF statement evaluates a condition. The condition can be anything that evaluates to a logical value of true or false such as comparison expression or a combination of multiple comparison expressions.

How do you write if else condition in PL SQL?

Syntax for IF-THEN-ELSE Statements: IF THEN -executed only if the condition returns TRUE <action_blockl> ELSE -execute if the condition failed (returns FALSE) END if; In the above syntax, keyword ‘IF’ will be followed by a condition which evaluates to ‘TRUE’/’FALSE’.

How many Elsif clauses can an if statement have?

An IF-THEN statement can have zero or one ELSE’s and it must come after any ELSIF’s. An IF-THEN statement can have zero to many ELSIF’s and they must come before the ELSE.

Which of the following is optional while using if/then else if statement?

After executing the statements following Then or Else, the program continues with the statement following End If. The Else and ElseIf blocks are both optional.

How if else works SQL?

When the condition in the IF clause evaluates to FALSE and you want to execute another statement block, you can use the ELSE clause. Each IF statement has a condition. If the condition evaluates to TRUE then the statement block in the IF clause is executed.

What are the two subtypes of the IF conditional statement in PL SQL?

An IF statement has two forms: IF-THEN and IF-THEN-ELSE. An IF-THEN statement allows you to specify only one group of actions to take. In other words, this group of actions is taken only when a condition evaluates to TRUE. An IF-THEN-ELSE statement allows you to specify two groups of actions.

When a condition in an IF THEN statements Test true?

If condition is true, then the statements following Then are executed. If condition is false, then each ElseIf (if any) is evaluated in turn. If a true condition is found, then the statements following the associated Then are executed.

What is the syntax of PL/SQL if-then-elsif?

The syntax of PL/SQL IF-THEN-ELSIF is as follows: Note that an IF statement can have any number of ELSIF clauses. If the first condition is false or NULL, the second condition in ELSIF is checked and so on. If all conditions are NULL or false, the sequence of statements in the ELSE clause will execute.

What is the use of if-then-elsif statement?

The IF-THEN-ELSIF statement is mainly used where one alternative should be chosen from a set of alternatives, where each alternative has its own conditions to be satisfied. The first conditions that return will be executed, and the remaining conditions will be skipped. The IF-THEN-ELSIF statement may contain ‘ELSE’ block in it.

What is the use of else if condition in PL/SQL?

The use of else if condition in PL/SQL program is required when we want to execute or skip a certain part of the code on fulfillment of some condition. If the condition becomes true then the corresponding block is executed else a different else if block is checked. This is a guide to PL/SQL else if.

What is the second form of if statement in PL/SQL?

PL/SQL IF-THEN-ELSE Statement This is the second form of the IF statement. The ELSE clause is added with the alternative sequence of statements. Below is the syntax of the IF-ELSE statement.