Does PL SQL have CASE statement?
PL/SQL also has CASE expression which is similar to the CASE statement. A CASE expression evaluates a list of conditions and returns one of multiple possible result expressions. The result of a CASE expression is a single value whereas the result of a CASE statement is the execution of a sequence of statements.
Can we use CASE statement in SQL function?
SQL queries use the ORDER BY clause for data sorting in either ascending or descending order. You can use the CASE statements in conjunction with the ORDER BY clause.
How do you write a CASE in PL SQL?
Like the IF statement, the CASE statement selects one sequence of statements to execute. However, to select the sequence, the CASE statement uses a selector rather than multiple Boolean expressions. A selector is an expression, the value of which is used to select one of several alternatives.
What is CASE statement in shell script?
The basic syntax of the case… esac statement is to give an expression to evaluate and to execute several different statements based on the value of the expression. The interpreter checks each case against the value of the expression until a match is found. If nothing matches, a default condition will be used.
How are CASE statements evaluated?
The CASE statement chooses from a sequence of conditions, and executes a corresponding statement. The CASE statement evaluates a single expression and compares it against several potential values, or evaluates multiple Boolean expressions and chooses the first one that is TRUE .
What is CASE function in SQL?
The SQL CASE Statement The CASE statement goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.
WHERE does CASE statement go in SQL?
The CASE statement always goes in the SELECT clause.
What is the meaning of DBMS_OUTPUT Put_line?
DBMS_OUTPUT is a package that enable you to display the output from PL/SQL block or subprograms,and PUT_LINE is procedure which is define inside DBMS_OUTPUT package. PUT_LINE procedure basically load the out put to the SGA(System Global Area). so you have to setting SET SERVEROUTPUT ON in SQL*PLUS to See the output.
What is CASE statement syntax?
What is CASE statement explain with example?
A CASE statement is similar to IF-THEN-ELSIF statement that selects one alternative based on the condition from the available options. CASE statement uses “selector” rather than a Boolean expression to choose the sequence. The value of the expression in the CASE statement will be treated as a selector.