I have a variable in Oracle that contains a string. This string has many words separated by $. I want to know if I can use Split Function to get the list of word.

Example:

Suppose that [variable] contains (hello$wordl$stack$overflow)

SELECT COLUMN_VALUE AS Description FROM TABLE( split_String( variable ) );

Description

hello

world

stack

overflow

CodePudding user response：

Yes, just define a split_string function to do it:

CREATE OR REPLACE TYPE stringlist AS TABLE OF VARCHAR2(20)
/

CREATE OR REPLACE FUNCTION split_String(
  i_str    IN  VARCHAR2,
  i_delim  IN  VARCHAR2 DEFAULT ','
) RETURN stringlist DETERMINISTIC
AS
  p_result       stringlist := stringlist();
  p_start        NUMBER(5) := 1;
  p_end          NUMBER(5);
  c_len CONSTANT NUMBER(5) := LENGTH( i_str );
  c_ld  CONSTANT NUMBER(5) := LENGTH( i_delim );
BEGIN
  IF c_len > 0 THEN
    p_end := INSTR( i_str, i_delim, p_start );
    WHILE p_end > 0 LOOP
      p_result.EXTEND;
      p_result( p_result.COUNT ) := SUBSTR( i_str, p_start, p_end - p_start );
      p_start := p_end   c_ld;
      p_end := INSTR( i_str, i_delim, p_start );
    END LOOP;
    IF p_start <= c_len   1 THEN
      p_result.EXTEND;
      p_result( p_result.COUNT ) := SUBSTR( i_str, p_start, c_len - p_start   1 );
    END IF;
  END IF;
  RETURN p_result;
END;
/

Then:

SELECT COLUMN_VALUE AS Description
FROM TABLE( split_String( 'hello$world$stack$overflow', '$' ) );

If you want to use a bind variable instead of a literal then you can:

SELECT COLUMN_VALUE AS Description
FROM TABLE( split_String( :variable, '$' ) );

(or ? for an anonymous bind variable.)

Outputs:

DESCRIPTION
hello
world
stack
overflow

db<>fiddle here

CodePudding user response：

I created a table name emp with one column name as name;

Following are the SQL i have used.

1. create table emp (name varchar2(20));
2. insert into emp values('Hello$WOrld$User');

SELECT LEVEL AS id, REGEXP_SUBSTR(emp.name, '[^$] ', 1, LEVEL) AS data FROM emp CONNECT BY REGEXP_SUBSTR(emp.name, '[^$] ', 1, LEVEL) IS NOT NULL;