Reverse String Word by Word using SQL

Question

I would need to reverse the word positions in a sentence or String.

For example : \"Hello World! I Love StackOverflow\", to be displayed as \"StackOverflow          


        

Answer 1

DECLARE 

in_string VARCHAR2(500);
pros_string  VARCHAR2(500);
out_string  VARCHAR2(800);  
spce_cnt NUMBER;


BEGIN

in_string := 'Hello World! I Love StackOverflow';
pros_string := ' '||in_string||' ' ;   
spce_cnt := REGEXP_COUNT(pros_string,' ',1);
FOR i IN reverse  1.. spce_cnt-1  
LOOP                               
 out_string := out_string||' '|| SubStr (pros_string,InStr(pros_string, ' ',1,i)+1 ,InStr(SubStr (pros_string,InStr(pros_string, ' ',1,i)+1 ),' '  ));    
Dbms_Output.Put_Line(out_string);    
END LOOP; 
END;