Junglee_George (3/11/2014)
dwain, your code is superb one..Please write the UPDATE syntax also, if want to update the column.
Do you mean like this?
WITH SampleData (OrderNo) AS
(
SELECT 'SO-123456' AS OrderNo
UNION ALL SELECT 'SO-123456-01'
UNION ALL SELECT 'SO-123456-2'
UNION ALL SELECT 'SO-123457'
UNION ALL SELECT 'SO-123457-1'
UNION ALL SELECT 'SO-123457-02'
UNION ALL SELECT 'SO-123458'
)
SELECT OrderNo
INTO #Table
FROM SampleData;
UPDATE a
SET OrderNo = NewOrderNo
FROM #Table a
CROSS APPLY
(
SELECT p1=CHARINDEX('-', OrderNo)
,s1=RIGHT(OrderNo, LEN(OrderNo)-CHARINDEX('-', OrderNo))
) b
CROSS APPLY
(
SELECT NewOrderNo=LEFT(OrderNo, p1+CHARINDEX('-', s1+'-')-1)
) c;
SELECT *
FROM #Table;
GO
DROP TABLE #Table;
My thought question: Have you ever been told that your query runs too fast?
My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.
Need to UNPIVOT? Why not CROSS APPLY VALUES instead?[/url]
Since random numbers are too important to be left to chance, let's generate some![/url]
Learn to understand recursive CTEs by example.[/url]
[url url=http://www.sqlservercentral.com/articles/St