What is decode in PLSQL?

What is decode in PLSQL?

The DECODE function returns a value that is the same datatype as the first result in the list. If the first result is NULL, then the return value is converted to VARCHAR2. If the first result has a datatype of CHAR, then the return value is converted to VARCHAR2. If no matches are found, the default value is returned.

How do I unwrap a PLSQL package?

Right-click within editor to show the pop-up-menu. Select Unwrap or simply press Ctrl-Shift-U to unwrap the code. The editor content is replaced by the unwrapped code.

How does decode work in SQL?

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. If default is omitted, then Oracle returns null.

What is decode in Oracle example?

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.

How do you decode with greater than?

To search for values greater than a search value you can combine the SIGN function with the DECODE statement. The SIGN function returns either -1,0 or 1 depending if a value is less than, equal to or greater than a specified value or expression.

What is decode and example?

To decode is to take out of code and put into understandable language. (Its opposite is encode, “to put into coded form”.) But dreams may sometimes also be decoded; psychologists often try to decode the images of their patients’ dreams so as to understand the emotions behind them.

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.

How do I wrap a Plsql code?

2. Steps To Wrap PL SQL Code Using Toad Example

1. Click on the Menu Utilities > Wrap Code.
2. For the Input File field, provide the source file name with the path (use the browse button).
3. For the Output File field, provide the file name with the path.
4. Then click on Wrap Code (green) button to wrap the code.

What does unwrap mean?

Definition of unwrap transitive verb. : to remove the wrapping from : disclose unwrap a package unwrap evidence in a criminal case.

How do I decode a value in SQL?

What is difference between decode and case in Oracle?

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.

What is PL/SQL decode?

PL/SQL Decode. The Decode function compares one expression to one or more other expressions and, when the search term is found, returns the match result expression.

How to write The DECODE function in SQL?

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 the use of code function in SQL?

Introduction to SQL DECODE () DECODE function in Standard Query Language (SQL) is used to add procedural IF – THEN – ELSE like statements to a query. It compares a given expression with each search value one by one and returns a result on the basis of outcomes received from the comparison.

How do I use the Oracle DECODE function with like?

However, it is possible to use the Oracle DECODE function with LIKE. You can do this with a combination of the SIGN function and the INSTR function. INSTR will check if a string is contained within another string. SIGN will check if the INSTR is positive or negative.