Can we use CASE statement in FROM clause in Oracle?

No, you can’t do that.

What is conditional statement in Oracle?

The condition is a Boolean variable, constant, or expression that evaluates to TRUE, FALSE, or NULL. If condition evaluates to TRUE, the executable statements found after the THEN keyword and before the matching END IF statement are executed. If condition evaluates to FALSE or NULL, those statements are not executed.

Can we use CASE statement in FROM clause?

No, you can’t pick a table to query using a CASE statement. CASE statements only go within expressions, such as for a column’s value or as part of your WHERE expression.

What is CHR 13 and CHR 10 in Oracle?

Chr(10) is the Line Feed character and Chr(13) is the Carriage Return character. You probably won’t notice a difference if you use only one or the other, but you might find yourself in a situation where the output doesn’t show properly with only one or the other.

What is CHR 26?

How can you actually use this?…Chart for all the valid Chr() codes:

Chr(26) SUB Substitute
Chr(27) ESC Escape
Chr(28) FS File Separator
Chr(29) GS Group Separator

What is conditional statement in PL SQL?

Decision making statements are those statements which are in charge of executing a statement out of multiple given statements based on some condition. The condition will return either true or false. Based on what the condition returns, the associated statement is executed.

How or condition works in Oracle?

Description. The Oracle OR condition is used to test multiple conditions where records are returned when any one of the conditions are met. It can be used in a SELECT, INSERT, UPDATE, or DELETE statement.

What does := mean in PL SQL?

the assignment operator
:= is the assignment operator in PL/SQL (Oracle’s procedural extension to SQL). You use this to assign values to variables. If you just use = then this is checking for equality rather than assigning a value.