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Can we use case in WHERE clause in Oracle SQL?
You can use a CASE expression in any statement or clause that accepts a valid expression. 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 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.
Is it possible to use a case statement in a SQL 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.
Can I use a ‘case’ statement in a ‘where’ clause?
Using a Case Statement in a SQL Where Clause. It is common knowledge that you can apply a Case statement in the SELECT or ORDER BY portion of a SQL statement. What isn’t well known is that you can use it effectively in a WHERE clause. Take an example I just ran into: I want to show all orders to every employee unless the order is assigned…
What is case in Oracle SQL?
PLSQL CASE statement has the functionality of an IF-THEN-ELSE statement.
What is the purpose of SQL where clause?
The SQL WHERE clause is used to restrict the number of rows affected by a SELECT, UPDATE or DELETE query. The WHERE condition in SQL can be used in conjunction with logical operators such as AND and OR, comparison operators such as ,= etc.
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).