This includes, search and result arguments. Yes, the maximum number of components that you can have in a DECODE function is 255. Is there a limit on the number of arguments that you can specify in one DECODE operator? I get the error message “ORA-00939: too many arguments for the function”. You will need to create a formula that calculates a unit number for each of your ranges.ĭECODE(TRUNC ((yrs_of_service + 3) / 4), 0, 0.04, If yrs_of_service = 1 and 5, then return 0.06 I need to write a DECODE request that will return the following: The formula will be evaluated at 2 if suppl_id is between 21 and 30.The formula will be evaluated as 1 if suppl_id is between 11 and 20.The formula will score 0 if suppl_id is between 1 and 10.However, you can try to create a formula that will define one number for one range and another number for another range, and so on.ĭECODE(TRUNC ((suppl_id - 1) / 10), 0, 'cat 1', Unfortunately, you cannot use the DECODE function for number ranges. 1-10 = ‘category 1’, 11-20 = ‘category 2’, instead of decoding each number individually. I would like to know if it is possible to use the DECODE function for number ranges, i.e. One of our readers suggested using the LEAST function (instead of DECODE) as follows:Īn example with dates above can be modified as follows: The combination of SIGN / DECODE is also useful for digital comparisons such as bonus sales.ĭECODE(SIGN(actual-target), -1, ‘No bonuses for you’, 0, ‘Just do it’, 1, ‘Congratulations, you are the winner’) The example with the dates above can be modified as follows:ĭECODE(SIGN(date1-date2), 1, date2, date1) One of our readers suggested combining the SIGN function with the DECODE function as follows: The formula below is 0 if date1 is greater than date2: To do so, use the DECODE function as follows:ĭECODE((date1 - date2) - ABS(date1 - date2), 0, date2, date1) Otherwise, the DECODE function should return date1. Native compilation is not a new feature in itself, but the lack of any preconditions for using itsuch as a C compiler installis indeed new. One of our readers wanted to know how to use the DECODE function to compare two dates (that is: date1 and date2), where date1 > date2, the DECODE function should return date2. Oracle Database 11g introduces a number of nifty new features to improve the performance of PL/SQL code, but the most dramatic ones are native compilation and intra-unit inlining. The DECODE function will compare each suppl_id value, one after the other. Request using DECODE is equivalent to the IF-THEN-ELSE design. You can use the DECODE function in an SQL query as follows: DECODE in the following versions of Oracle/PLSQL Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i If no match is found, DECODE will return NULL (if no match is found). If no matches are found, the DECODE function will return the default value. result_id – value returned if the expression coincided with the sought search.ĭefault – optional.expression_id – is an expression for comparison.Oracle/PLSQL syntax of the DECODE functionĭECODE( expression_id, search_id, result_id. SQL tutorial: DECODE function in Oracle Database
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