How do you write nested if else in PL SQL?

How do you write nested if else in PL SQL?

Using nested IF statements : IF « PL SQL « Oracle PL / SQL PUT_LINE(‘Employee is Salaried’); 14 ELSE 15 DBMS_OUTPUT. PUT_LINE(‘Employee is Executive Management’); 16 END IF; 17 END IF; 18 END IF; 19 END; 20 / Employee is Executive Management PL/SQL procedure successfully completed.

Can we use nested IF in SQL?

It is always legal in PL/SQL programming to nest the IF-ELSE statements, which means you can use one IF or ELSE IF statement inside another IF or ELSE IF statement(s).

Can we use if condition in Oracle SQL query?

In Oracle, the IF-THEN-ELSE statement is used to execute code when a condition is TRUE, or execute different code if the condition evaluates to FALSE.

Can we use with clause inside with clause in Oracle?

no,you can’t nest them. you can use multiple cte’s though.

How many nested IF clauses can be included within an if clause?

You can have any number of IF clauses nested within an IF clause.

How many nested if statements SQL?

There is just one. Basically, it is the concatenation of all of yours, because none of the conditions would be met. See, if nothing passes, then you can’t arbitrarily choose which one fails.

Can we use with clause in subquery?

The WITH clause is for subquery factoring, also known as common table expressions or CTEs: The WITH query_name clause lets you assign a name to a subquery block. You can then reference the subquery block multiple places in the query by specifying query_name.

Can we use with clause in a function?

That’s right, you can now create a function within the WITH clause and use it in the body of your main select statement.

What is %type in PL SQL?

The %TYPE attribute, used in PL/SQL variable and parameter declarations, is supported by the data server. Use of this attribute ensures that type compatibility between table columns and PL/SQL variables is maintained.

Which statements execute a sequence of statements multiple times?

LOOP statements execute a sequence of statements multiple times. There are three forms of LOOP statements: LOOP , WHILE-LOOP , and FOR-LOOP .

How many else clauses can an if statement have?

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 is the advantage of WITH clause in Oracle?

The WITH clause may be processed as an inline view or resolved as a temporary table. The SQL WITH clause is very similar to the use of Global temporary tables. This technique is often used to improve query speed for complex subqueries and enables the Oracle optimizer to push the necessary predicates into the views.

Does with clause improve performance?

Oracle call’s the WITH clause “sub-query factoring”. Its main use is to improve the performance of queries which use the same sub-query more than once. We can also use it to make our code easier to understand but over-simplification can cause poor performance.

What is difference between type and Rowtype?

Example# %TYPE : Used to declare a field with the same type as that of a specified table’s column. %ROWTYPE: Used to declare a record with the same types as found in the specified table, view or cursor (= multiple columns).

How many nested IF clauses can be included within if clause?

Answer B is correct. You can only have one ELSE clause for every IF clause. If the IF clause is not nested, there is only one.

What is iterative structure?

Iterative constructs are structures used in computer programming to repeat the same computer code multiple times. Loops are the most commonly used iterative constructs. They provide mechanisms for controlling the number of times the code in the loop executes before the loop ends.