decode oracle user password sql developer

It works like the following if-then-elsif statement: IF 2 = 1 THENĬode language: SQL (Structured Query Language) ( sql ) If they are equal, the function returns the fifth argument (Two). Otherwise, it compares the first argument with the fourth argument (2). If the first argument equals the second one, the function returns the third argument (One). In this example, the function compares the first argument (2) with the second one. The result is: Two Code language: SQL (Structured Query Language) ( sql )

What if you want to compare the first argument with a list of arguments? See the following example: SELECT DECODE( 2, 1, 'One', 2, 'Two') It works like the following if-then-else statement: IF 1 = 2 THENĮND IF Code language: SQL (Structured Query Language) ( sql ) If you want to specify a default value when the first argument is not equal to the second one, you append the default value to the argument list as shown below: SELECT DECODE( 1, 2, 'One', 'Not one') The query returns a null value because one does not equal two. The following example is slightly different from the one above. It works like the following if statement IF 1 = 1 THENĮND IF Code language: SQL (Structured Query Language) ( sql ) Because they are equal, the function returns the third argument which is the string 'One': SELECT DECODE( 1, 1, 'One')ĭual Code language: SQL (Structured Query Language) ( sql ) In the following example, the Oracle DECODE() function compares the first argument (1) with the second argument (1).

The Oracle DECODE() function allows you to add the procedural if-then-else logic to the query. This includes the expression, search, and result arguments.Summary: in this tutorial, you will learn how to use the Oracle DECODE() function to embed if-then-else logic in SQL queries. Question: Is there a limit to the number of arguments that you can have in one DECODE statement? I'm getting an error, 'ORA-00939: too many arguments for function'.Īnswer: Yes, the maximum number of components that you can have in a DECODE function is 255. If yrs_of_service = 1 and 5 then return 0.06Īnswer: You will need to create a formula that will evaluate to a single number for each one of your ranges.ĭECODE(TRUNC (( yrs_of_service + 3) / 4), 0, 0.04, Question: I need to write a DECODE statement that will return the following: The formula will evaluate to 2, if the supplier_id is between 21 and 30. The formula will evaluate to 1, if the supplier_id is between 11 and 20. The formula will evaluate to 0, if the supplier_id is between 1 and 10. In this example, based on the formula: TRUNC ((supplier_id - 1) / 10 However, you can try to create a formula that will evaluate to one number for a given range, and another number for the next range, and so on.ĭECODE(TRUNC ((supplier_id - 1) / 10), 0, 'category 1', Question: I would like to know if it's possible to use the DECODE function for ranges of numbers, ie 1-10 = 'category 1', 11-20 = 'category 2', rather than having to individually decode each number.Īnswer: Unfortunately, you can not use the DECODE function for ranges of numbers. The date example above could be modified as follows: LEAST(date1, date2) Helpful Tip #2: One of our viewers suggested using the LEAST function (instead of the DECODE function) as follows: Sales Bonuses DECODE(SIGN(actual-target), -1, 'NO Bonus for you', 0,'Just made it', 1, 'Congrats, you are a winner')

The SIGN/DECODE combination is also helpful for numeric comparisons e.g. The date example above could be modified as follows: DECODE(SIGN(date1-date2), 1, date2, date1) Helpful Tip #1: One of our viewers suggested combining the SIGN function with the DECODE function as follows: The formula below would equal 0, if date1 is greater than date2: (date1 - date2) - ABS(date1 - date2) Otherwise, the DECODE function should return date1.Īnswer: To accomplish this, use the DECODE function as follows: DECODE((date1 - date2) - ABS(date1 - date2), 0, date2, date1)

Question: One of our viewers wanted to know how to use the DECODE function to compare two dates (ie: date1 and date2), where if date1 > date2, the DECODE function should return date2.

Decode oracle user password sql developer