how to split and select value in row in mysql - mysql

Question

CREATE DEFINER=`root`#`localhost` PROCEDURE `TestExampl2_SP`(in Array_Value varchar(255))
begin
declare i int default 0;
declare loopcount int default 0;
declare arrayChar varchar(50) ;
declare isexist int(10) default 0;
declare existString varchar(50);
declare notexistString varchar(50) ;
set loopcount=( select LENGTH(Array_Value) - LENGTH(REPLACE(Array_Value, ',', '')));
while i<=loopcount do
SET i = i + 1;
set arrayChar =(
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(Array_Value, ',', i), ',', -1));
set isexist=(select count(*) from emp
where ename=arrayChar);
if(isexist >0 ) then
select CONCAT_WS(',',existString,arrayChar) into existString;
else
select CONCAT_WS(',',notexistString,arrayChar) into notexistString;
end if;
END WHILE;
select notexistString;
END
This is my Procure when i execute this Procedure whith input call TestExampl2_SP('a,m,n,x,y,z') i am getting notexistString ='x,y,z' but insetd of this i want result row wise i.e i have to split by comma
like this :
**value**
x
y
z
please suggest me how i will implement this .

Answer 1

You can follow below code to split string in sql.
CREATE FUNCTION SplitString
(
#Input NVARCHAR(MAX),
#Character CHAR(1)
)
RETURNS #Output TABLE (
Item NVARCHAR(1000)
)
AS
BEGIN
DECLARE #StartIndex INT, #EndIndex INT
SET #StartIndex = 1
IF SUBSTRING(#Input, LEN(#Input) - 1, LEN(#Input)) <> #Character
BEGIN
SET #Input = #Input + #Character
END
WHILE CHARINDEX(#Character, #Input) > 0
BEGIN
SET #EndIndex = CHARINDEX(#Character, #Input)
INSERT INTO #Output(Item)
SELECT SUBSTRING(#Input, #StartIndex, #EndIndex - 1)
SET #Input = SUBSTRING(#Input, #EndIndex + 1, LEN(#Input))
END
RETURN
END
And check using
SELECT Item FROM dbo.SplitString('Apple,Mango,Banana,Guava', ',')