Improve company productivity with a Business Account.Sign Up

x
?
Solved

How to loop through a SQL column

Posted on 2010-11-30
3
Medium Priority
?
458 Views
Last Modified: 2012-06-21
Hi Guys

I have a table called TempMemo.
It consists of 2 columns: AccountId varchar(50)
                                        Memo text

I need to copy the data into a another table called SLMemo.

It consists of 2 columns: AccountId varchar(50)
                                        Memo varchar(1000)

The memo filled in Tempmemo will have more than 1000 characters.

I need all the data to come in.

So if a row in Memo in TempMemo has 5000 characters  then what should be imported:

5 lines of 1000 with the same Accountid.

Remebering the character len will be different.
I hope this makes sense.

Cheers
Shezad

0
Comment
Question by:Shezad Ahmed
  • 2
3 Comments
 
LVL 7

Expert Comment

by:rmm2001
ID: 34240336
There's probably better ways to do this but...
DECLARE @count INT
DECLARE @memoLen INT
DECLARE @memo TEXT
DECLARE @AccountID VARCHAR(50)
SET @count = (SELECT COUNT(9) FROM TempMemo)

WHILE (@count > 0)
  SELECT @AccountID = AccountID, @memo = Memo, @memoLen = LEN(Memo)
  FROM TempMemo
 
  WHILE (@MemoLen > 0)
    INSERT NewTable (AccountID, Memo)
    VALUES @AccountID, LEFT(Memo, 1000)
   
    SET @memoLen = @memoLen - 1000
  END
 
  SET @count = @count - 1
END  
0
 
LVL 8

Accepted Solution

by:
raulggonzalez earned 2000 total points
ID: 34252770
Hi,

The solution I've got is using a cursor, it's well known that cursors are not the best, but it works.

Hope it helps.


DECLARE @TempMemo 
	TABLE (AccountID VARCHAR(50),
			Memo TEXT)

DECLARE @SLMemo 
	TABLE (AccountID VARCHAR(50),
			Memo VARCHAR(1000))


INSERT INTO @TempMemo
VALUES(
'account1',
'1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890'

)

INSERT INTO @TempMemo
VALUES(
'account2',
'1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456'

)


DECLARE @AccountID VARCHAR(50)
DECLARE @Memo VARCHAR(MAX) -- SQL 2005 doesn't allow TEXT variables, so I created VARCHAR(MAX)
DECLARE @Memo1000 VARCHAR(1000)
DECLARE @MemoLen INT
DECLARE @start INT  

SET @start = 1

DECLARE cr CURSOR
FORWARD_ONLY 
FOR
SELECT  AccountId , Memo text
FROM @TempMemo

OPEN cr
FETCH NEXT FROM cr INTO @AccountID, @Memo
WHILE @@FETCH_STATUS = 0
BEGIN
   SET @MemoLen = LEN(@Memo)
   IF @MemoLen > 1000
   BEGIN
      WHILE @MemoLen > 0
      BEGIN
         SET @Memo1000 = SUBSTRING(@Memo, @start, 1000)
         INSERT INTO @SLMemo (AccountId ,Memo)
         VALUES (@AccountID, @Memo1000)
         
         SET @start = @start + 1000
         SET @MemoLen = @MemoLen - 1000
         
      END
   END
   
   ELSE
   BEGIN
      INSERT INTO @SLMemo (AccountId ,Memo)
      VALUES (@AccountID, @Memo)
    END

FETCH NEXT FROM cr INTO @AccountID, @Memo

END
CLOSE cr
DEALLOCATE cr

SELECT * FROM @SLMemo

Open in new window

0
 
LVL 8

Expert Comment

by:raulggonzalez
ID: 34256009
Just realize that can do the same without the IF block...

Cheers
DECLARE @TempMemo 
	TABLE (AccountID VARCHAR(50),
			Memo TEXT)

DECLARE @SLMemo 
	TABLE (AccountID VARCHAR(50),
			Memo VARCHAR(1000))


INSERT INTO @TempMemo
VALUES(
'account1',
'1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890'

)

INSERT INTO @TempMemo
VALUES(
'account2',
'1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456'

)


DECLARE @AccountID VARCHAR(50)
DECLARE @Memo VARCHAR(MAX) -- SQL 2005 doesn't allow TEXT variables, so I created VARCHAR(MAX)
DECLARE @Memo1000 VARCHAR(1000)
DECLARE @MemoLen INT
DECLARE @start INT  

SET @start = 1

DECLARE cr CURSOR
FORWARD_ONLY 
FOR
SELECT  AccountId , Memo text
FROM @TempMemo

OPEN cr
FETCH NEXT FROM cr INTO @AccountID, @Memo
WHILE @@FETCH_STATUS = 0
BEGIN
   SET @MemoLen = LEN(@Memo)
      WHILE @MemoLen > 0
      BEGIN
         SET @Memo1000 = SUBSTRING(@Memo, @start, 1000)
         INSERT INTO @SLMemo (AccountId ,Memo)
         VALUES (@AccountID, @Memo1000)
         
         SET @start = @start + 1000
         SET @MemoLen = @MemoLen - 1000
         
      END
   
FETCH NEXT FROM cr INTO @AccountID, @Memo

END
CLOSE cr
DEALLOCATE cr

SELECT * FROM @SLMemo

Open in new window

0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

In part one, we reviewed the prerequisites required for installing SQL Server vNext. In this part we will explore how to install Microsoft's SQL Server on Ubuntu 16.04.
This shares a stored procedure to retrieve permissions for a given user on the current database or across all databases on a server.
Using examples as well as descriptions, and references to Books Online, show the documentation available for date manipulation functions and by using a select few of these functions, show how date based data can be manipulated with these functions.
SQL Database Recovery Software repairs the MDF & NDF Files, corrupted due to hardware related issues or software related errors. Provides preview of recovered database objects and allows saving in either MSSQL, CSV, HTML or XLS format. Ensures recov…

608 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question