T-SQL中的分割功能

Question

I have table with field that contains coma separated string. I whant create query thats return follow result:

I want to create query that return split text. For exapmle:

Data in table:

| ID                                   | Names                            |
| ------------------------------------ | -------------------------------- |
| 63F5D993-3AC9-4EEA-8007-B669542BAD9A | John Smith,Kerry King,Tom Arraya |

Required result:

 ID                                   | Names                             
------------------------------------  | -----------
63F5D993-3AC9-4EEA-8007-B669542BAD9A  | John Smith                       
------------------------------------- | -----------
63F5D993-3AC9-4EEA-8007-B669542BAD9A  | Kerry King                       
------------------------------------- | -----------
63F5D993-3AC9-4EEA-8007-B669542BAD9A  | Tom Arraya  

I found "split" function for T-SQL but its works not quite right for my case. I can't execute it like this:

SELECT dbo.Split(dbo.name, ',') FROM dbo.Mytable

It can execute only follows:

SELECT * FROM dbo.Split('John Smith,Kerry King,Tom Arraya', ',')

But it does not suit me. Also i attempted write cursor:

DECLARE @bkb varchar(256)
DECLARE @Bkb_Cursor CURSOR 
SET @Bkb_Cursor = CURSOR SCROLL FOR  
SELECT bkb.best_know_by
  FROM  [sugarcrm_cmsru_dev].[dbo].[contacts] c
  left JOIN [dbo].[email_addr_bean_rel]  eb
  ON eb.[bean_id] = c.[id]
  JOIN [dbo].[email_addresses] ea
  ON ea.[id] = eb.[email_address_id]
  JOIN [dbo].[contacts_cstm] ccs
  ON eb.bean_id = ccs.id_c
  left JOIN [dbo].[BestKnowBy$] bkb
  ON c.[campaign_id] =bkb.Con_id
  where c.deleted = 0;  
OPEN @Bkb_Cursor;  
FETCH NEXT FROM @Bkb_Cursor
INTO @bkb;
WHILE @@FETCH_STATUS = 0
BEGIN  
      PRINT dbo.Splitfn(@bkb);
      FETCH NEXT FROM @Bkb_Cursor INTO @bkb;  
END
CLOSE @Bkb_Cursor;  
DEALLOCATE @Bkb_Cursor;  
GO

But it is not worked. I get error "Column "dbo" is not allowed in this context, and the user-defined function or aggregate "dbo.Splitfn" could not be found."

How can I solve this problem?

My query looks like follow:

SELECT c.[id], 
       bkb.best_know_by
  FROM  [sugarcrm_cmsru_dev].[dbo].[contacts] c
  left JOIN [dbo].[email_addr_bean_rel]  eb
  ON eb.[bean_id] = c.[id]
  JOIN [dbo].[email_addresses] ea
  ON ea.[id] = eb.[email_address_id]
  JOIN [dbo].[contacts_cstm] ccs
  ON eb.bean_id = ccs.id_c
  left JOIN [dbo].[BestKnowBy$] bkb
  ON c.[campaign_id] =bkb.Con_id
  where c.deleted = 0; 

The bkb.best_know_by field contains comma separated string. How can i use "Cross Apply" in this case?

Answer 1

You need to use CROSS APPLY in combination with your table's result set which will execute the function for every row:

SELECT st.ID, spl.value
FROM SplitTest st
CROSS APPLY string_split(st.Names, ',') spl

Edit: With regard to the addition of your query to your question, you could do the following:

;WITH CTE_Query AS (
    SELECT c.[id], 
       bkb.best_know_by
    FROM  [sugarcrm_cmsru_dev].[dbo].[contacts] c
    left JOIN [dbo].[email_addr_bean_rel]  eb
    ON eb.[bean_id] = c.[id]
    JOIN [dbo].[email_addresses] ea
    ON ea.[id] = eb.[email_address_id]
    JOIN [dbo].[contacts_cstm] ccs
    ON eb.bean_id = ccs.id_c
    left JOIN [dbo].[BestKnowBy$] bkb
    ON c.[campaign_id] =bkb.Con_id
    where c.deleted = 0
)
SELECT cte.id, spl.value
FROM CTE_Query AS cte
CROSS APPLY string_split(cte.best_know_by, ',') spl

Answer 2

Cross Apply will do the trick

Select A.ID
      ,Names = B.Item   -- << Return Field from your Split Function
 From  YourTable A
 Cross Apply (Select * from dbo.Split(A.Names, ',') ) B

With your query

SELECT c.[id]
      ,S.*      --<< Removed bkb.best_know_by and Replaced with S.* (don't know your Split() Return Field)
 FROM  [sugarcrm_cmsru_dev].[dbo].[contacts] c
 LEFT JOIN [dbo].[email_addr_bean_rel]  eb ON eb.[bean_id] = c.[id]
 JOIN [dbo].[email_addresses] ea ON ea.[id] = eb.[email_address_id]
 JOIN [dbo].[contacts_cstm] ccs   ON eb.bean_id = ccs.id_c
 LEFT JOIN [dbo].[BestKnowBy$] bkb   ON c.[campaign_id] =bkb.Con_id
 Cross Apply dbo.Split(bkb.best_know_by,',')  S
 where c.deleted = 0;