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Concatenate Strings using Cursor

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Submitted on: 7/20/2001 10:24:28 AM
By: Dumitru Radu 
Level: Intermediate
User Rating: By 6 Users
Compatibility: SQL Server 7.0
Views: 20602
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     Construct a query with a long string field which contains concatenated selections from initial table.

 
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--**************************************
-- Name: Concatenate Strings using Cursor
-- Description:Construct a query with a long string field which contains concatenated selections from initial table.
-- By: Dumitru Radu
--
-- Assumes:Good example for using cursors.
--
--This code is copyrighted and has-- limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=328&lngWId=5--for details.--**************************************

CREATE PROCEDURE pGetDescription
as
DECLARE AllDescription CURSOR
	KEYSET
	FOR
	SELECT ITEM_NUMBE, SEQ_NUMBER, COMMENT_TE
	FROM WEBEXT
GO
CREATE TABLE WEBDESC(
		ItemNumber varchar(15),
		CommentText ntext
		)
OPEN AllDescription
PRINT 'The cursor contains ' + CONVERT(char(6), @@CURSOR_ROWS) + ' rows'
DECLARE @ItemNumber varchar(15),
	@PreviousItemNumber varchar(15),
	@SequenceNumber int,
	@PreviousSequenceNumber int,
	@CommentText varchar(50),
	@PreviousCommentText varchar(50),
	@ConcatenatedText varchar(6000)
FETCH FIRST FROM AllDescription INTO @ItemNumber, @SequenceNumber, @CommentText
SET @PreviousItemNumber = @ItemNumber
SET @ConcatenatedText = @CommentText
SET @PreviousSequenceNumber = 0
SET @PreviousCommentText = @CommentText
WHILE @@FETCH_STATUS = 0
BEGIN
	FETCH NEXT FROM AllDescription INTO @ItemNumber, @SequenceNumber, @CommentText
	IF @ItemNumber = @PreviousItemNumber and @SequenceNumber = @PreviousSequenceNumber + 1
		BEGIN
		SET @ConcatenatedText = @ConcatenatedText + @CommentText
		END
	ELSE
		BEGIN
		IF len(@ConcatenatedText) > 0
			BEGIN
			INSERT WEBDESC (ItemNumber, CommentText)
			VALUES (@PreviousItemNumber, REPLACE(@ConcatenatedText, '~;~', ' '))
			SET @ConcatenatedText = @CommentText
			END
		END
SET @PreviousSequenceNumber = @SequenceNumber
SET @PreviousItemNumber = @ItemNumber
END
CLOSE AllDescription
DEALLOCATE AllDescription


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2/4/2011 1:45:19 PM

good work
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