What is CASE Oracle SQL?
Oracle CASE expression allows you to add if-else logic to SQL statements without having to call a procedure. The CASE expression evaluates a list of conditions and returns one of the multiple possible results. You can use a CASE expression in any statement or clause that accepts a valid expression.
What is CASE 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.
Does CASE matter in Oracle SQL?
Oracle isn’t case-sensitive, unless you mean where name = ‘Smith’ vs where name = ‘SMITH’ , but surely that is standard.
Can we use SQL statement in CASE statement?
The Case statement in SQL is mostly used in a case with equality expressions. The SQL Case statement is usually inside of a Select list to alter the output. What it does is evaluates a list of conditions and returns one of the multiple possible result expressions.
What is a case in database?
The case statement in SQL returns a value on a specified condition. We can use a Case statement in select queries along with Where, Order By, and Group By clause. It can be used in the Insert statement as well.
HOW DO CASE statements work?
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 the difference between Case and decode in SQL?
CASE is a statement while DECODE is a function. CASE can work with logical operators other than ‘=’ : DECODE performs an equality check only. CASE is capable of other logical comparisons such as < ,> ,BETWEEN , LIKE etc.
Is SQL equal case-sensitive?
By default, it depends on the operating system and its case sensitivity. This means MySQL is case-insensitive in Windows and macOS, while it is case-sensitive in most Linux systems. However, you can change the behavior by changing collation.
Is SQL Oracle case-sensitive?
Oracle Text supports case-sensitivity for word and ABOUT queries.