What is decode in SQL with example?

What is decode in SQL with example?

In Oracle, DECODE function allows us to add procedural if-then-else logic to the query. DECODE compares the expression to each search value one by one. If expression is equal to a search, then the corresponding result is returned by the Oracle Database. If a match is not found, then default is returned.

What is decode in SQL Oracle?

DECODE compares expr to each search value one by one. If expr is equal to a search , then Oracle Database returns the corresponding result . If no match is found, then Oracle returns default . If default is omitted, then Oracle returns null.

Can we use decode in SQL Server?

In Oracle, you can use DECODE function to evaluate a list of expressions, and if a value is matched return the corresponding result. In SQL Server, you can use CASE expression that is also supported by Oracle. Note that NULL values in DECODE function and CASE expression are handled differently .

How do you write decoding?

The basic syntax for writing DECODE function in SQL is as follows: DECODE (expression , search_1, result_1[, search_2, result_2].,[,search_n,result_n] [, default]); The parameters used in the above mentioned syntax are: expression: expression argument is the value which is to be searched and compared with.

What is an example of decoding in communication?

Decoding is the process of turning communication into thoughts. For example, you may realize you’re hungry and encode the following message to send to your roommate: “I’m hungry.

What is the correct meaning of the word decode?

Definition of decode transitive verb. 1a : to convert (something, such as a coded message) into intelligible form. b : to recognize and interpret (an electronic signal) 2a : decipher sense 3a. b : to discover the underlying meaning of decode the play’s imagery.

What is the difference between decode and case with examples?

Sometimes Difference between CASE and DECODE in Oracle is a little puzzling as to what to use and when. CASE handles NULL differently….CASE VS DECODE.