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Split A String By Using A Number Table
From Wiki
Using a number table is a very fast way to split a string. You can even use it inside a function if you want to. If You don't have a number table already then create this table now. Remeber this is a one time deal.
- -- Create our Pivot table ** do this only once-- populate it with 1000 rows
- CREATE TABLE NumberPivot (NumberID INT PRIMARY KEY)
- DECLARE @intLoopCounter INT
- SELECT @intLoopCounter =0
- SET NOCOUNT ON
- WHILE @intLoopCounter <=999 BEGIN
- INSERT INTO NumberPivot
- VALUES (@intLoopCounter)
- SELECT @intLoopCounter = @intLoopCounter +1
- END
- GO
Here are the queries
Numbers
- DECLARE @chvGroupNumbers VARCHAR(1000)
- SELECT @chvGroupNumbers ='1,4,77,88,4546,234,2,3,54,87,9,6,4,36,6,9,9,6,4,4,68,9,0,5,3,2,'
- SELECT SUBSTRING(',' + @chvGroupNumbers + ',', NumberID + 1,
- CHARINDEX(',', ',' + @chvGroupNumbers + ',', NumberID + 1) - NumberID -1)AS VALUE
- FROM NumberPivot
- WHERE NumberID <= LEN(',' + @chvGroupNumbers + ',') - 1
- AND SUBSTRING(',' + @chvGroupNumbers + ',', NumberID, 1) = ','
- GO
Characters
- DECLARE @chvGroupNumbers VARCHAR(1000)
- SELECT @chvGroupNumbers ='Abc,A,V,G,KJHLJJKHGGF,J,L,O,O,I,U,Y,G,V,R'
- SELECT SUBSTRING(',' + @chvGroupNumbers + ',', NumberID + 1,
- CHARINDEX(',', ',' + @chvGroupNumbers + ',', NumberID + 1) - NumberID -1)AS VALUE
- FROM NumberPivot
- WHERE NumberID <= LEN(',' + @chvGroupNumbers + ',') - 1
- AND SUBSTRING(',' + @chvGroupNumbers + ',', NumberID, 1) = ','
- GO
Order the string
- DECLARE @chvGroupNumbers VARCHAR(1000)
- SELECT @chvGroupNumbers ='Abc,A,V,G,KJHLJJKHGGF,J,L,O,O,I,U,Y,G,V,R'
- SELECT SUBSTRING(',' + @chvGroupNumbers + ',', NumberID + 1,
- CHARINDEX(',', ',' + @chvGroupNumbers + ',', NumberID + 1) - NumberID -1)AS VALUE
- FROM NumberPivot
- WHERE NumberID <= LEN(',' + @chvGroupNumbers + ',') - 1
- AND SUBSTRING(',' + @chvGroupNumbers + ',', NumberID, 1) = ','
- ORDER BY 1
- GO
Get distinct values
- DECLARE @chvGroupNumbers VARCHAR(1000)
- SELECT @chvGroupNumbers ='1,4,77,88,4546,234,2,3,54,87,9,6,4,36,6,9,9,6,4,4,68,9,0,5,3,2'
- SELECT DISTINCT SUBSTRING(',' + @chvGroupNumbers + ',', NumberID + 1,
- CHARINDEX(',', ',' + @chvGroupNumbers + ',', NumberID + 1) - NumberID -1)AS VALUE
- FROM NumberPivot
- WHERE NumberID <= LEN(',' + @chvGroupNumbers + ',') - 1
- AND SUBSTRING(',' + @chvGroupNumbers + ',', NumberID, 1) = ','
- ORDER BY 1
- GO
Contributed by: --SQLDenis 02:27, 31 May 2008 (GMT)
Part of SQL Server Programming Hacks
Section Transposing and pivoting
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