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Can we use WHERE clause in case statement in Oracle?
Introduction to Oracle CASE expression Oracle CASE expression allows you to add if-else logic to SQL statements without having to call a procedure. For example, you can use the CASE expression in statements such as SELECT , UPDATE , or DELETE , and in clauses like SELECT , WHERE , HAVING , and ORDDER BY .
Can case when be used in WHERE clause?
CASE can be used in any statement or clause that allows a valid expression. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING.
Which keyword is used to end a case statement?
Case labels must end with a colon ( : ). A break keyword must be present in each case. There can be only one default label. We can nest multiple switch statements.
What parts of a case statement are mandatory?
end statement
The case statement must always have an end statement associated with it. The expression used in a case statement must have an integral or enumerated type or be of a class type in which the class has a single conversion function to an integral or enumerated type. You can have any number of case statements within a case.
What is Oracle CASE?
Oracle CASE SQL statement. The CASE statement is like a series of IF statements, only using the key word WHEN. A CASE statement is evaluated from top to bottom. If a condition is true, then corresponding THEN clause is executed and execution jumps to the END CASE (short circuit evaluation) clause.
What does case mean in Oracle?
Term: CASE. Definition: The Oracle CASE expression is similar to the IF-THEN-ELSE statement. Each condition is checked starting from the first condition. When a condition is satisfied (the “WHEN” part) the expression returns the associated value (the “THEN” part).
What is case in Oracle SQL?
PLSQL CASE statement has the functionality of an IF-THEN-ELSE statement.