t-sql finding a string and reporting the index
Given the following string called @ToSearch how would I get the result matching the index of all the S characters in the string. For example:
set @ToSearch = 'SQLServer 2008 开发者_JAVA技巧includes a variety of string and null functions' ;
set @Tofind = 's';
match 1 match 2 match 3 match 4
----------- ----------- ----------- -----------
1 4 23 38
I tried this but is not working like I suspected.
SET @ToSearchTemp =
SUBSTRING(@ToSearchTemp, CHARINDEX('s',@ToSearchTemp,1), LEN(@ToSearchTemp) );
Any ideas how to solve this with CTE or simply with query.
If you create an auxiliary numbers table first you can then do
SELECT number
FROM numbers
WHERE number <= LEN(@ToSearch) AND
SUBSTRING(@ToSearch,number,LEN(@Tofind)) = @Tofind
This will give you the result in row format. If you really need in column format you would need to PIVOT
but this would require you to either define a maximum number of results or use dynamic SQL.
ALTER PROCEDURE StringSearch
--(
@ToSearch VARCHAR(MAX)
,@Tofind CHAR(1)
--)
AS
DECLARE @Sentinel INT;
SET @Sentinel =0;
DECLARE @ToSearchTemp VARCHAR(MAX)
SET @ToSearchTemp = @ToSearch
DECLARE @Record int
SET @Record=0;
DECLARE @TestZero int
DECLARE @Matches Table(Match1 int,Id int)
While @Sentinel < LEN(@ToSearch)
Begin
INSERT INTO @Matches(Match1,Id)
VALUES(charindex(@Tofind,@ToSearchTemp)+@Record,@Sentinel+1)
set @ToSearchTemp = substring(@ToSearchTemp,charindex(@Tofind,@ToSearchTemp)+1,len(@ToSearchTemp))
print @ToSearchTemp
SET @TestZero=charindex(@Tofind,@ToSearchTemp)
if @TestZero=0
break;
else
set @Record =charindex(@Tofind,@ToSearchTemp)+@Record
SET @Sentinel= @Sentinel +1
End
select [1] as Match1, [2] as Match2, [3] as Match3,[4] as Match4
FROM
(
select top 4 Match1,ID from @Matches
)DataTable
PIVOT
(
sum(Match1)
For ID
in ([1],[2],[3],[4])
) PivotTable
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