Oracle PL/SQL includes a variety of string functions that can be used to manipulate and analyze character strings. Some common Oracle PL/SQL string functions include:
CONCAT function concatenates two strings together. Example:
SELECT CONCAT('Hello, ', 'world!') FROM DUAL;
INSTR function returns the position of a substring within a string. Example:
SELECT INSTR('Hello, world!', 'world') FROM DUAL;
LENGTH function returns the number of characters in a string. Example:
SELECT LENGTH('Hello, world!') FROM DUAL;
SUBSTR function returns a substring of a string, starting at a specified position and of a specified length. Example:
SELECT SUBSTR('Hello, world!', 7, 5) FROM DUAL;
TRIM function removes any leading or trailing whitespace from a string. Example:
SELECT TRIM(' Hello, world! ') FROM DUAL;
REPLACE function replaces a string of characters in a string with another set of characters. Example:
SELECT REPLACE('Hello PL/SQL', 'PL/SQL') FROM DUAL;
LOWER function converts a string to lowercase. Example:
SELECT LOWER('HeLlO, WoRlD!') FROM DUAL;
UPPER function converts a string to uppercase. Example:
SELECT UPPER('HeLlO, WoRlD!') FROM DUAL;
These are just a few examples of the many string functions available in PL/SQL. It’s important to note that the syntax and specific behavior of these functions may vary depending on the specific version of Oracle DBMS you are using.