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WITH
ProductMaster(Product_ID, ProductName, Price)
AS
(
SELECT 1, ‘XYZ’, 20.10 UNION ALL
SELECT 2, ‘ABC’, 11.35 UNION ALL
SELECT 3, ‘PQR’, 05.33
),
Genre(Genre_ID, GenreName)
AS
(
SELECT 101, ‘Horror’ UNION ALL
SELECT 102, ‘Romantic’ UNION ALL
SELECT 103, ‘Suspense’
),
Product_Genre(Genre_ID, ProductID)
AS
(
SELECT 101, 1 UNION ALL
SELECT 102, 1 UNION ALL
SELECT 101, 2 UNION ALL
SELECT 101, 3 UNION ALL
SELECT 103, 3
),

cte3 as(
SELECT
row_number() over(partition by ProductMaster.Product_ID order by ProductMaster.Product_ID) num,
Product_ID,
ProductName,
Genre.GenreName,
Price
FROM
ProductMaster,
Genre,
Product_Genre
WHERE
Product_Genre.Genre_ID = Genre.Genre_ID
AND Product_Genre.ProductID = ProductMaster.Product_ID — )test
),

cte4 as
(
select * from cte3 where num=1
),

cte5 as
(
select num,product_id,null as ProductName,GenreName,null as price from cte3 where num1
)

select cte4.Product_ID,
cte4.ProductName,
cast(cte4.GenreName as varchar(100)) + (case when cte5.GenreName is null then ” else ‘ | ‘ end)
+ (case when cte5.GenreName is null then ” else cte5.GenreName end) as GenreName,
cte4.Price
from cte4 left outer join cte5 on cte4.Product_ID = cte5.Product_ID

We have a recursive chaining that was done and I need to get the first part of the chain for all rows in the table.

Another words…

Table Widget
PK_id old_id new_id
1 1 2
2 2 3
3 3 4
4 15 16
5 16 17
6 17 18
7 18 19
8 100 105
9 105 110
10 110 91
11 777 111
12 111 401
13 401 845
There are 4 chains there and I need to bring back the first of the chain so I would get:
1
15
100
777

I have a query that can bring back the entire chain but can’t figure out how to get the beginning of the chain for each recursive chain. The query below is not exactly correct as you may notice. It brings back one extra row which is not correct.

With CTE (new_id, old_id, rn, level)
as
(select old_id, new_id, ROW_NUMBER() OVER ( ORDER BY PK_id) AS RN, 0 as level
from xref_system LatestSystem where old_id =’777′
union all
select c.new_id, c.old_id, pc.RN, Level + 1
from widget as c
inner join cte as pc on c.old_id = pc.new_id
)
select new_id, old_id, RN, level
from CTE
ORDER BY rn, LEVEL

This brings back:
new_id old_id RN level
777 111 1 0
111 777 1 1
401 111 1 2
845 401 1 3

So, there are 2 questions….
1) The above query is not correct.
2) Would like a query to go through an entire table and bring back the following result:
1
15
100
77

Thanks in advance!
Abbi

IF OBJECT_ID (N’dbo.tempdbperms’, N’U') IS NOT NULL
DROP TABLE dbo.tempdbperms;
GO
CREATE TABLE dbo.tempdbperms
(
[ServerName] [nvarchar](100) NULL,
[dbname] [nvarchar](100) NULL,
[principal_name] [nvarchar](50) NULL,
[principal_id] [nvarchar](50) NULL,
[principal_type_desc] [nvarchar](100) NULL,
[class_desc] [nvarchar](50) NULL,
[object_name] [nvarchar](100) NULL,
[permission_name] [nvarchar](50) NULL,
[permission_state_desc] [nvarchar](50) NULL
);
GO
DECLARE @DBNAME nvarchar (1000) = (SELECT DB_NAME());
DECLARE @ServerName nvarchar (1000) = (select @@servername);
WITH perms ( [ServerName],
[dbname],
[principal_name],
[principal_id],
[principal_type_desc],
[class_desc],
[object_name],
[permission_name],
[permission_state_desc])

AS
(
select @ServerName as ServerName,
@DBNAME as dbname,
USER_NAME(p.grantee_principal_id) AS principal_name,
dp.principal_id,
dp.type_desc AS principal_type_desc,
p.class_desc,
OBJECT_NAME(p.major_id) AS object_name,
p.permission_name,
p.state_desc AS permission_state_desc
from sys.database_permissions p
inner JOIN sys.database_principals dp
on p.grantee_principal_id = dp.principal_id
)

–users

SELECT @ServerName as ServerName,
@DBNAME as dbname,
p.principal_name,
p.principal_type_desc,
p.class_desc, p.[object_name],
p.permission_name,
p.permission_state_desc,
cast(NULL as sysname) as role_name
FROM perms p
WHERE principal_type_desc ‘DATABASE_ROLE’

UNION

–role members

SELECT @ServerName as ServerName,
@DBNAME as dbname,
rm.member_principal_name,
rm.principal_type_desc,
p.class_desc,
p.object_name,
p.permission_name,
p.permission_state_desc,
rm.role_name
FROM perms p
right outer JOIN
(
select @ServerName as ServerName,
@DBNAME as dbname,
role_principal_id,
dp.type_desc as principal_type_desc,
member_principal_id,
user_name(member_principal_id) as member_principal_name,
user_name(role_principal_id) as role_name–,*
from sys.database_role_members rm
INNER JOIN sys.database_principals dp
ON rm.member_principal_id = dp.principal_id

) rm

ON rm.role_principal_id = p.principal_id
order by 1;
GO
INSERT INTO dbo.tempdbperms
SELECT *
FROM perms;
GO

Can you suggest me different options to fire multiple select statement simultaneously from the same table except using sql script in the oracle and mysql

I’ve changed your joins to outer in case you have a title without a Genre assigned or there is an orphaned entry in Product_Genre.

Also, I’d change the ‘union all’ to a simple union to reduce possible duplicity. Now ABC is twice as horrific as you might think. Just remove the single ‘all’ and it will just be horror.

declare @priorID int, @priorName varchar(3), @priorPrice varchar(6), @priorGenreCurrent varchar(max);
declare @pID int, @pName varchar(3), @pPrice varchar(6), @pGenreCurrent varchar(20), @pGenreTxt varchar(max);
declare @pCounter int;

select @pCounter = 1;
select @priorID = 0;
select @priorName = null;
select @priorPrice = null;
select @priorGenreCurrent = null;
select @pGenreTxt = null;

declare myCursor cursor for
–If you have tables comment out the with block
–Begin with block
WITH
ProductMaster(Product_ID, ProductName, Price)
AS
(
SELECT 1, ‘XYZ’, 20.10 UNION
SELECT 2, ‘ABC’, 11.35 UNION
SELECT 3, ‘PQR’, 05.33
),
Genre(Genre_ID, GenreName)
AS
(
SELECT 101, ‘Horror’ UNION
SELECT 102, ‘Romantic’ UNION
SELECT 103, ‘Suspense’
),
Product_Genre(Genre_ID, ProductID)
AS
(
SELECT 101, 1 UNION
SELECT 102, 1 UNION
SELECT 101, 3 UNION
SELECT 103, 3 UNION
SELECT 101, 2 UNION all
SELECT 101, 2
)
–End with block
SELECT
ProductMaster.Product_ID,
ProductMaster.ProductName,
Genre.GenreName,
ProductMaster.Price
FROM
ProductMaster
left outer join Product_Genre on ProductMaster.Product_ID = Product_Genre.ProductID
left outer join Genre on Product_Genre.Genre_ID = Genre.Genre_ID
order by ProductMaster.Product_ID, Product_Genre.Genre_ID;

open myCursor
fetch next from myCursor into @pID, @pName, @pGenreCurrent, @pPrice;
while @@FETCH_STATUS = 0
begin
if (@priorID = 0) or (@priorID @pID)
begin
print @priorName + ‘ ‘ + @pGenreTxt + ‘ ‘ + @priorPrice;
select @pGenreTxt = @pGenreCurrent;
end
else
begin
select @pGenreTxt = @pGenreTxt + ‘ | ‘ + @pGenreCurrent;
end
select @priorID = @pID;
select @priorName = @pName;
select @priorPrice = @pPrice;
select @priorGenreCurrent = @pGenreCurrent;
fetch next from myCursor into @pID, @pName, @pGenreCurrent, @pPrice;
select @pCounter = @pCounter+1;
end;
print @priorName + ‘ ‘ + @pGenreTxt + ‘ ‘ + @priorPrice
close myCursor;
deallocate myCursor;

You are a legend, everytime I google for a T SQL problem and your website comes up – I know my problem is solved!.

This example was especially well presented.

Thanks!
VB

SELECT * from table
where 1=1 and @inputId = 0

union all

SELECT * from table
where 1=1 and @inputId != 0

with cte as
(
SELECT * from table
where 1=1 and inputId = 0

union all

SELECT * from table
where 1=1 and @inputId 0
)
select * from cte

category table
having categoryID,categoryName,parentCategory,categoryStatus

i want to have just like this output

categoryID | CategoryName | ParentCategory | CategoryStatus
1 Shoes null Active
2 Shoes>Air 1 Active
3 Shoes>Air>Jordan 2 Active

Hope you might help thanks ;)

Thanks for the article. It solved my problem

I want to make columns in a table like below:

Id Column1 Column2 Column3
1 5 5 => Same as Column1 5 => Same as Column2
2 2 12 => column1 current + column2.prev + column3.previous = 2+5+5 17 => column2.current + column3.prev = 12+5
3 3 32 => 3+12+17

easier way to see:

Id Column1 Column2 Column3
1 5 5 => Same as Column1 5 => Same as Column2
2 2 12 => 2+5+5 17 => 12+5
3 3 32 => 3+12+17 49 => 32+17

I am looking forward any answer and it will be appreciated. Thank you in advance

Dok

Dok

I have small doubt. The results from the above query and for the below query were same.

Then why i have to use CTE. Can you explain? Actually, i am the beginner for CTE’s.

select ProductMaster.Product_ID,
ProductMaster.ProductName,
Genre.GenreName,
ProductMaster.Price
from ProductMaster PM
Inner Join Product_Genre P_G on PM.Product_Id = P_G.Productid
Inner Join Genre G On G.Genre_Id = P_G.Genre_Id

Waiting for your reply,

Thanks & Regards
Sri Sagar. P

Is there any level for recursive CTE? How many levels we can go?

Please reply.

Thanks
Anand

for eg. if customer name, add store in one table then same customer phone no. in phone table.
so if customer name,add and phone no. are twise delete the record.

thanx madhivanan for the support

waiting for result