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16 Ιαν 2011 · You can use IF() where in Oracle you would have used DECODE(). mysql> select if(emp_id=1,'X','Y') as test, emp_id from emps;
1 Ιουν 2023 · The purpose of the Oracle DECODE function is to perform an IF-THEN-ELSE function. It’s similar to a CASE statement, but CASE is a statement where DECODE is a function. It allows you to provide a value, and then evaluate other values against it and show different results.
The Oracle DECODE() function allows you to add the procedural if-then-else logic to the query. In the following example, the Oracle DECODE() function compares the first argument (1) with the second argument (1).
mysql> SET block_encryption_mode = 'aes-256-cbc'; mysql> SET @key_str = SHA2('My secret passphrase',512); mysql> SET @init_vector = RANDOM_BYTES(16); mysql> SET @crypt_str = AES_ENCRYPT('text',@key_str,@init_vector); mysql> SELECT CAST(AES_DECRYPT(@crypt_str,@key_str,@init_vector) AS CHAR); +-----+ | CAST(AES_DECRYPT(@crypt_str,@key_str,@init ...
SELECT DECODE (3, 1, 'Equal 1,', 2, 'Equal 2', 'Not Equal 1 or 2'); Code language: SQL (Structured Query Language) (sql) This example works like the following IF-THEN-ELSEIF-ELSE statement: IF 3 = 1 THEN RETURN 'Equal 1'; ELSE IF 3 =2 THEN RETURN 'Equal 2'; ELSE RETURN 'Not Equal 1 or 2'; END IF ; Code language: SQL (Structured Query Language ...
8 Αυγ 2023 · Example: Code: SELECT DECODE (ENCODE ('mytext','mykeystring'),'mykeystring'); Explanation: The above MySQL statement decodes the encoded string 'mytext' as specified in the argument and returns the original string. Output: mysql> SELECT DECODE (ENCODE ('mytext','mykeystring'),'mykeystring
6 Αυγ 2024 · Learn how to use DECODE() in Oracle for conditional logic in data transformation. Compare DECODE() to the CASE WHEN statement in performance and behavior.
