Retrieving Hierarchical Data From A Single Table
Sep 3, 2006
I would like to retrieve a hierarchical list of Product Categories from a single table where the primary key is a ProductCategoryId (int) and there is an index on a ParentProductCategoryId (int) field. In other words, I have a self-referencing table. Categories at the top level of the hierarchy have a ParentProductCategoryId of zero (0). I would like to display the list in a TreeView or similar hierarchical data display control.
Is there a way to retrieve the rows in hierarchical order, sorted by CategoryName within level? I would like to do so from a stored procedure.
Example data:
ProductCategoryID CategoryDescription ParentProductcategoryID ParentCategoryDescription Level
------------------------------------------------------------------------------------------------------------------------------------------------
1 Custom Furniture 0 0
2 Boxes 0 0
3 Toys 0 0
4 Bedroom 1 Custom Furniture 1
5 Dining 1 Custom Furniture 1
6 Accessories 1 Custom Furniture 1
7 Picture Frames 6 Accessories 2
8 Serving Trays 6 Accessories 2
9 Entertainment 1 Custom Furniture 1
10 Planes 3 Toys 1
11 Trains 3 Toys 1
12 Boats 3 Toys 1
13 Automobiles 3 Toys 1
14 Jewelry 2 Boxes 1
15 Keepsake 2 Boxes 1
16 Specialty 2 Boxes 1
Desired output:
Custom Furniture
Accessories
Picture Frames
Serving Trays
Bedroom
Dining
Entertainment
Boxes
Jewelry
Keepsake
Specialty
Toys
Automobiles
Boats
Planes
Trains
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Nov 30, 2013
I have two table. Department is hierarchical table.
Department
--- id (int primary key)
--- name (varchar)
--- parent (int)
Users
--- Id
--- name
--- department_id
This query return all data from departments. But i cannot understand how get data from users
SELECT t1.name AS lvl1, t2.name as lvl2, t3.name as lvl3
FROM Department AS t1
LEFT JOIN Department AS t2 ON t2.parent = t1.id
LEFT JOIN Department AS t3 ON t3.parent = t2.id
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Jun 9, 2006
Recently I was in need of a hierarchical tree data. I learned about CTE and how they can be used to build hierarchical data with simple syntax. I used CTE and was through with the task. Later during free time, I tried to compare CTE approach with the traditional SQL 2K Table Function approach. It was surprising to see the query costs when I ran both the modes at one go...
Query Cost (relative to batch) : 0.49%
Query Text : Select * From fn_GetTree(8);
Query Cost (relative to batch) : 99.51%
Query Text : with treedata (id, parentid, status, prevStatus, lvl) as (select ...)
What does that indicate? Does it mean that the Table Function approach is much faster than CTE? I am sure that I was not making unwanted Joins in the CTE mode.
Can someone explain why that huge difference is there? And what the scenarios where CTE is better over Table Functions?
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Oct 10, 2007
I have nine type of buttons,
EnrollAmtBTM
PlacAmtBTM and so on, I also have a SQL setver view V_Payment_Amount_List from here i need to display the data on the button
this is the select value to display when i choose the agency list and the amount corresponding to that agency_ID is displayed here the agency_ID is fetched from the SQL CONDITION
THIS IS WHERE I GET FETCH AGENCY DATA WHEN SELECTED i.e SQL CONDITIONprotected void CollectAgencyInformation()
{
WebLibraryClass ConnectionFinanceDB;ConnectionFinanceDB = new WebLibraryClass();
string SQLCONDITION = "";string RUN_SQLCONDITION = "";
SessionValues ValueSelected = null;int CollectionCount = 0;if (Session[Session_UserSPersonalData] == null)
{ValueSelected = new SessionValues();
Session.Add(Session_UserSPersonalData, ValueSelected);
}
else
{
ValueSelected = (SessionValues)(Session[Session_UserSPersonalData]);
}ProcPaymBTM.Visible = false;PaymenLstBTN.Visible = false;
Dataviewlisting.ActiveViewIndex = 0;TreeNode SelectedNode = new TreeNode();
SelectedNode = AgencyTree.SelectedNode;
SelectedAgency = SelectedNode.Value.ToString();
Agencytxt.Text = SelectedAgency;
Agencytxt2.Text = SelectedAgency;
Agencytxt3.Text = SelectedAgency;DbDataReader CollectingDataSelected = null;
try
{CollectingDataSelected = ConnectionFinanceDB.CollectedFinaceData("SELECT DISTINCT AGENCY_ID FROM dbo.AIMS_AGENCY where Program = '" + SelectedAgency + "'");
}
catch
{
}DataTable TableSet = new DataTable();
TableSet.Load(CollectingDataSelected, LoadOption.OverwriteChanges);int IndexingValues = 0;foreach (DataRow DataCollectedRow in TableSet.Rows)
{if (IndexingValues == 0)
{SQLCONDITION = "where (Project_ID = '" + DataCollectedRow["AGENCY_ID"].ToString().Trim() + "'";
}
else
{SQLCONDITION = SQLCONDITION + " OR Project_ID = '" + DataCollectedRow["AGENCY_ID"].ToString().Trim() + "'";
}
IndexingValues += 1;
}SQLCONDITION = SQLCONDITION + ")";
ConnectionFinanceDB.DisconnectToDatabase();if (Dataviewlisting.ActiveViewIndex == 0)
{
Dataviewlisting.ActiveViewIndex += 1;
}
else
{
Dataviewlisting.ActiveViewIndex = 0;
}
SelectedAgency = SQLCONDITION;
ValueSelected.CONDITION = SelectedAgency;
???? this is where i use to get count where in other buttons and are displayed.... but i changed the query to display only the Payment_Amount_Budgeted respective to the agency selected. from the viewRUN_SQLCONDITION = "SELECT Payment_Amount_Budgeted FROM dbo.V_Payment_Amount_List " + SQLCONDITION;
try
{
CollectionCount = ConnectionFinanceDB.CollectedFinaceDataCount(RUN_SQLCONDITION);
EnrollAmtBTM.Text = CollectionCount.ToString();
}
catch
{
}////this is my CollectedFinaceDataCount-- where fuction counts the records in the above select statement if i use for eg.
"SELECT Count(Placement_Retention_ID) FROM dbo.V_Retention_6_Month_Finance_Payment_List"
here is the functionpublic int CollectedFinaceDataCount(String SQLStatement)
{int DataCollection;
DataCollection = 0;
try
{
SQLCommandExe = FinanceConnection.CreateCommand();
SQLCommandExe.CommandType = CommandType.Text;
SQLCommandExe.CommandText = SQLStatement;
ConnectToDatabase();DataCollection = (int) SQLCommandExe.ExecuteScalar();
DisconnectToDatabase();
}catch (Exception ex)
{Console.WriteLine("Exception Occurred :{0},{1}",
ex.Message, ex.StackTrace.ToString());
}
return DataCollection;
}
So here mu requirement request is to display only the value fronm the view i have against the agency selected
Please help ASAP
Thanks
Santosh
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Apr 4, 2006
How can i combine my data in single row ? All data are in a single table sorted as employeeno, date
Code:
Employee No Date SALARY
1 10/30/2006 500
1 11/30/2006 1000
2 10/25/2006 800
3 10/26/2006 900
4 10/28/2006 1000
4 11/01/2006 8000
Should Appear
Code:
EmployeeNo Date1 OLDSALARY Date2 NEWSALARY
1 10/30/2006 500 11/30/2006 1000
2 10/25/2006 800
3 10/26/2006 900
4 10/28/2006 1000 11/01/2006 800
PLEASE HELP I REALLY NEED THE RIGHT QUERY FOR THIS OUTPUT.
THANKS IN ADVANCE
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Feb 5, 2008
this is a simple problem but it's just driving me mad as it's not reading from my dB. basically, I've have reviews stored in my dB and want to display them in a textbox by clicking on a button called btnReviews. I think the problem might be that there is too much text stored per row of the table (as it is a review), but I have the datatype set as text in sql. here's the simple un-errorred code I have behind the button. any ideas where I went wrong. i've a feeling it's something small but it's just taken too long to figure out.protected void btnReviews_Click(object sender, EventArgs e) { String strConn = ConfigurationManager.ConnectionStrings["conLocalDatabase"].ConnectionString; SqlConnection dbConnection = new SqlConnection(strConn); SqlCommand dbCommand = new SqlCommand("Select [ReviewC] From [Review])", dbConnection); dbCommand.Parameters.AddWithValue("Review", txtReviewView.Text); try { dbConnection.Open(); dbCommand.ExecuteNonQuery(); } catch (SqlException ex) { Console.WriteLine(ex.ToString()); } finally { if (dbConnection != null) { dbConnection.Close(); } } }
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Apr 28, 2008
Hi
I ve a datagrid . And Two Database table in sqlServer2005. The name of the tables are 'Property' and 'userid'.
My datagrid wants to retrive all records from Property table and one record from userid table. The Property table contains Propertycode, lastdate , departmentname.
The userid table contains so many record along with 'id' record which my datagrid wants to retrieve.
pl tel me how 2 write code for that?
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Jan 30, 2008
Hi i have a junction table(UserGroups) which is linking my users table with my groups table, however when the information is coming back in the format below, instead i want the group names to appear in only one field, instead of repeating the same data, could someone please tell me what i need to change
UserName: Edwin CarolsUserAge: 28JobTitle: ManagerGroupName: MUFC
UserName: Edwin CarolsUserAge: 28JobTitle: ManagerGroupName: AFC
Below is my SQL statement;
SELECT Users.UserName,Users.UserAge, Users.JobTitle, Groups.GroupName FROM Users INNER JOIN UserGroups ON Users.UserID = UserGroups.UserID INNER JOIN Groups ON UserGroups.GroupID = Groups.GroupID WHERE (Users.UserID = '5')
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Mar 11, 2014
I have 'codes' and 'Description' field in 'ecode' table and 'codes' in quote table values for 'Codes' in quote table is like
Quoteid Codes
0012 LB,WS
0031WDC
In 'ecode' table 'description' column contain the description for each code
for eg :
Ecode Table : -
Codes Description
Lb - Late Booking
WS - Winter Sports
WDC - Wedding Cover
How to select 'description' when retrieving data from quote table
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Jul 8, 2015
I am in problem that I have delete data in my production table.
Now how to retrieve it?
I have only Yesterdays Full and Transaction Backup files.
I used the following query for deleting all data.
delete from t1;
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Jul 25, 2007
Can anyone help me on this...
when i select data from table using select statement it takes huge amount of time....The table contains 7 million entries and when i select by mentioning a criteria it takes around 45 secs..The system has 4GB RAM and Dual Processing CPU. The select statement does not contain any grouping and all..
Will it take this much time to retrieve data.?.
The table does include an indexed field,
So can anyone help me on the different things i can do to make the retrieval faster?
Andy
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Feb 9, 2012
I'm trying to insert data into a table from two tables into a single table along with a hard coded value.
insert into TABLE1
(THING,PERSONORGROUP,ACCESSRIGHTS)
VALUES
((select SYSTEM_ID from TABLE2 where
AUTHOR IN (select SYSTEM_ID from TABLE2 where USER_ID
=('USER1'))),(select SYSTEM_ID from TABLE2 where USER_ID
=('USER2')),255)
I get the following-
Msg 512, Level 16, State 1, Line 1
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
The statement has been terminated.
Do I need to use a cursor?
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May 3, 2007
Hellofor MS SQL 2000 i am having :CREATE TABLE [dbo].[Items]([id_Items] [int] IDENTITY(1,1) NOT NULL PRIMARY KEY CLUSTERED,[id_ItemsSup] [int] NULL,[Name] [nvarchar] (100) NOT NULL,[SubItems][int] DEFAULT (0)) ON [PRIMARY]with : UPDATE [Items] SET SubItems = (SELECT COUNT(id_Items) AS ct FROM dbo.Items WHERE id_ItemsSup = 1) WHERE id_Items = 1I get how many subItems has Item = 1how can I update the Column SubItems (for each row) ?to get the total of subItems for each Item ?thank you
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Sep 28, 2007
Hi,
I would like to know best way to design the database for the following requirement. I have a collection of tree nodes. each node has a type and set of attributes and a parent node (except for the node which has no parent). node type refers to the level of the node in the tree. child node inherits the attributes from the parent node (similar to object oriented programming where derived class inherits properties of the base class). user can add/update/delete nodes from the tree and user can choose to override the attributes of the parent node in child node.
what is best way to store this type of data? should there be a separate table for each node type (level in the tree). but the problem with this approach is that we need to duplicate the columns of the parent node, because user can overwrite the parent node attributes in the child node. there can be more than one at the same level and all of them share same set of attributes. this concept is exactly like inheritance in object oriented programming. as far as the data is concerned, there are around 15 levels, around 30K nodes and 30 attributes spread across different node levels.
thanks,
RK
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May 1, 2006
How can I create a function that returns hierarchical data from a table with this structure:
- CategoryID
- CategoryName
- CategoryFather
I want to bring the result set like this...
CategoryID | CategoryName | CategoryFather | HierarchicalLevel
1 | Video | 0 | 0
2 | DivX | 1 | 1
3 | WMV | 1 | 1
4 | Programming | 0 | 0
5 | Web | 4 | 1
6 | ASP.Net | 5 | 2
7 | ColdFusion | 5 | 2
How can I do this? Does anybody has a sample code? I need this on SQL Server 2000 and if it's possible (but not too necessary) in SQL Server 2005.
Thanks.
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Apr 17, 2008
Hello
I have a problem that I am hoping somebody can help me with!
I have built a hierarchy using the adjacency list model so I have records with an id that maps to the parent record so my hierarchy looks something like this:-
Newspapers
National Newspapers
Daily Express
Express Publications
Express Supplements
Daily Mail
Mail Publications
Mail Supplements
Mirror
So my table would look like below:-
1 Newspapers Null
2 National Newspapers 1
3 Daily Express 2
4 Express Publications 3
5 Express Supplements 3
and so on. What I would like to be able to do is flatten out the hierarchy so I get something like below where each level is in a column.
NewsPapers National Newspapers Daily Express Express Publications
NewsPapers National Newspapers Daily Express Express Supplements
Ive used CTE's for displaying the hierarchy and producing aggregate figures when joing the hierarchy to spend information but am struggling to come up with any code that would produce a flattened hierarchy.
Any help would be greatly received!
Thanks
Rich
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Feb 17, 2006
hi folks,
I have to import hierarchical text files like:
32;country;city;postalcode;street
21;name;firstname;salutation;title;age;nickname
21;name;firstname;salutation;title;age;nickname
...
additionally I have to eleminate doubles. what is the best way for this problem ?
I have set up a flatfilesource with two columns and a conditional split on the first column
so now I have an output with [country;city;postalcode;street] and one with [name;firstname;salutation;title;age;nickname]. How do I split this in columns, put it in a dataset keeping the relations and remove doubles ?
Iam looking forward for any helping idea.
rgrds,
matze
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Mar 24, 2007
for MS SQL 2000
I am trying to do a hierarchical table and i want to add a ON DELETE CASCADE
CREATE TABLE [dbo].[Users](
[id_Users] [int] IDENTITY(1,1) NOT NULL PRIMARY KEY CLUSTERED,
[id_UsersSup] [int] NULL,
[Users] [nvarchar] (100) NOT NULL
) ON [PRIMARY]
ALTER TABLE [dbo].[Users] ADD
CONSTRAINT [FK_Users_Sup] FOREIGN KEY
(
[id_UsersSup]
) REFERENCES [Users] (
[id_Users]
)
ON DELETE CASCADE
but MS SQL refuse to create the foreign key
even if there is 4 levels under the deleted id_Users I want to delete all the rows on all levels under
thank you for helping
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Aug 29, 2014
Following is my db table
student_id student_code student_parent_id student_name
1 11 0 a
2 111 1 b
3 1111 2 c
4 11111 3 d
How to generate following op?
student_id student_code student_parent_id student_name Hierarchy
1 11 0 a 11 - 111
2 111 1 b 11-111-1111
3 1111 2 c 11-111-1111-11111
4 11111 3 d 11111
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Oct 19, 2015
I have a lookup table with 4 levels of codes like follows:
create table #RiskElementCategory(
[RiskElementCategoryCode] [nchar](5),
[RiskElementCategoryCodeDsc [nvarchar](50),
[RiskElementCategoryCode_2] [nchar](5),
[RiskElementCategoryLevel2Dsc] [nvarchar](50),
[Code] ...
Along with some other rows with the same format. I need to join to this table using a RiskElementCode that I get from the Source system. The trick is that it can be at any level, but I don't know which level it is at. So what I have to do is somehow get the correct row from the lookup table based on the code from the source to get the correct level.
So for Example, If i receive the RiskElementCode of 'SSR', that is in column RiskElementCategoryCode_3 so I need the row that has 'NA' for anything after RiskElementCategoryCode_3 where RiskElementCategoryCode_3 = 'SSR'. If i get 'DFR' I need to get the row where RiskElementCategoryCode_4 = 'DFR' since there are no levels deeper than 4 i don't need to check anything else. If I get 'PRR', then I need the row where RiskElementCategoryCode = 'PRR' and code_2, code_3 and code_4 = 'NA'.
So besides getting the correct row based on the code, i need to get the correct row based on the level where the next levels are 'NA'. I should only get 1 row each time.
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Aug 3, 2013
CREATE TABLE #Source
(
Id int identity(1,1)
,categoryint
,Leaf_Node_code varchar(10) --
,Level1_Name varchar(20)
,Level2_Name varchar(20)
[Code] ....
Here category 1 has 3 levels ,
category 2 has 4 levels ,
category 3 has 5 levels ,
Below is the target table, here Leaf_Node_code should populate to only for leaf nodes for each category .. Need to populate Node_id with hierarchical data
I am unable frame a sql query to handle different levels , in future #Source may have more levels .
How to handle multiple hierarchy levels .. here only leaf node should have Leaf_Node_code
CREATE TABLE TARGET_TABLE
(
ID INT IDENTITY(1,1) primary key
,Node_id HIERARCHYID
,category int
,Parent_id int references TARGET_TABLE(id)
,Leaf_Node_code varchar(10)
,Namevarchar(20)
)
Here is the expected output:
IDcategoryParent_idLeaf_Node_codeName Node_id
11NULLNULLWorld
211NULLAsia
312101India
42NULLNULLa
524NULLaa
625NULLaaa
726102aaaa
83NULLNULLb
938NULLbb
1039NULLbbb
11310NULLbbbb
12311103bbbb
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Oct 12, 2007
Hi,
in my application, the data is in hierarchical format. there is a tree with set of nodes having parent child relationships. this data can be stored either through adjacency or nested set model approach. this is fine. but the issue here is that each child node inherits the properties of its parent node, parent's parent node and so on until the root node. lets say root node has two attributes A1 and A2 and they are stored in two columns in a table. but its child nodes inherits this data from its parent and it has its own extra attributes. so should I copy parent's data for the child node as two additional columns? the problem is that there are around 15 levels in the tree and the attribute list grows from top to bottom in the tree. lets say I need to find all the attributes for a leaf node in the tree (both direct and inherited), if I am not storing the inherited attributes for each node, then I need to walk-up the tree and find all the inherited attributes. there are around 30K nodes and each node has around ten attributes. xml is not option because of large volumes of data and auditing and reporting on individual nodes. what is the best way to store this type of data? my current approach is to have an attribute table having nodeid as a foreign key and only store the direct and NOT the inherited attributes of the node in the table, but this means to find all the attributes for the node, I need to gather the attributes of all the parents until the root node. I can't see any easy way out for this.
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Feb 18, 2008
Hi All,
I am attempting to create a Visual C++ application based on displaying financial charts and am using SQL Express to store Stock information such as the Exchanges the stocks are traded on, the indicessectors they belong to and the Closing prices for as long as I can download data for. I am not proficient in C++ nor SQL and am using this project to learn both languages as well as making myself rich beyond my wildest dreams.
I have "designed" a database with the following tables:
tblDate_ 1 column clmDate (Primary Key, smalldatetime, NOT NULL)
tblStockExchange_ 4 column clmStockExchangeID (PK, int, NOT NULL)
clmParentID (int, null)
clmStockExchange (nvarchar(50), NOT NULL)
clmMarkets_ (FK, nchar(20), NOT NULL)
tblMarkets_ 1 column clmMarkets (PK, nchar(20), NOT NULL)
tblIndices_ 1 column clmIndices (PK, nchar(50), NOT NULL)
tblSectors_ 1 column clmSectors (PK, nchar(50), NOT NULL)
tblMarkets_Sectors 3 columns clmMarkets_SectorsID(PK, int, NOT NULL)
clmMarkets_ (FK, nchar(20), NOT NULL)
clmSectors_ (FK, nchar(50), NOT NULL)
tblSecurities_ 4 columns clmEPIC (PK, nchar(10), NOT NULL)
clmSecurity_Type (nchar(5), NOT NULL)
clmSecurty_Name (nchar(50), NOT NULL)
clmSectors_ (FK, nchar(50), NOT NULL)
tblSecurities_Indices 3 columns clmSecurities_IndicesID (PK, int, NOT NULL)
clmEPIC_ (FK, nchar(10), NOT NULL)
clmIndices_ (FK, nchar(50), NOT NULL)
tblSecurities_Date_OHLCV 8 columns clmOHLCVID (PK, int, NOT NULL)
clmEPIC_ (FK, nchar(10), NOT NULL)
clmDate_ (FK, smalldatetime, NOT NULL)
clmOpen (float, NOT NULL)
clmHigh (float, NOT NULL)
clmLow (float, NOT NULL)
clmClose (float, NOT NULL)
clmVolume (float, NOT NULL)
Why so many tables? perhaps you should put some more in...
This was the only way I could work out how to store one-to-one and one-to-many relationships required for:
- Many closing prices for many stocks
- Stocks belonging to many indices
- Stocks belonging to only one sector
- Stocks belonging to only one market (MainMarket or AIM for LSE)
- Stocks belonging to only one Exchange (I am aware of dual listed stocks but one thing at a time)
Why nchar's and not nvarchar's?
Because I didn't realise the benefits of nvarchar's until recently. How can I change this a loose the extra spaces in the cells.
Why do some tables have IDs and others don't?
I decided to put ID columns in for tables that didn't have obvious Primary Keys - if someone could explain the advantages if ID columns I would be grateful.
To the SQL Professional's eye there will be some obvious things wrong with this design and your criticism is welcome. The database I have is achieving what I would like it to do; I can plot charts using the data but I have ran into problems when trying to create a TreeView control which is what I would like to use as a navigational tool in my application.
It would seem that pulling hierarchal data from a relational database, to pass to the TreeView control, is a tricky task to say the least. I have found many articles online which discuss how to do this (using an Adjacency List Model or Nested Set Model) but they define a fairly simple example at the beginning (based on fruit or electrical goods) but don't appear to talk about gathering data from an existing relational database or changing an existing relational database so that it is more suited to storing hierarchal information. I have Joe Celko's - Tree and Hierachies in SQL for Smarties but sadly this fine material is a little beyond me!
I would like the hierarchy to look like this:
StockExchange
Market
Sector
Stock
Indices
Sector
Stock
I have written three queries to get the StockExchangeMarketSectorStock information individually from each table but am struggling with ways to put all the rows together, add left and right values (Nested Set Model) then run queries against this to get individual nodes to pass to the TreeView control. Therefore is there something I need to add to the original design?
Any help would be greatly appreciated.
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May 21, 2014
An example of what I am talking about is the employee table in the Adventureworks database. This has employeeID and then ManagerID, ManagerID just being the EmployeeID of the person whom the original reports to.
I know the queries for querying this type of data and even making recursive common table expressions. What I cannot seem to find is how one goes about BUILDING said table. I see all sorts of examples where people are just doing INSERT table VALUES () manually to load the table. The problem is, I need to create a table that has potentially thousands of records.
It will essentially be a dimensional map. Don't even get me started as to they why, I will just suffice to say that is what the client and project want . I have a process that will do this now, but it is not very dynamic and very hard coded. To me, there seems like there should be some sort of standardized methodology for handling this.
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Apr 22, 2015
I have the data in this format
ID NAME ParentID
CV1 CV1NAME CV
CVX1 CVX1NAME CV1
CVXX1 CVXX1NAME CVX1
CV2 CV2NAME CV
CVX2 CVX2NAME CV2
CVXX2 CVXX2NAME CVX2
How can i flatten this data into this format
CVID CVNAME CVXID CVXNAME CVXXID CVXXNAME
cv1 cv1name cvx1 cvx1name cvxx1 cvxx1name
cv2 cv2name cvx2 cvx2name cvxx2 cvxx2name
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Jun 22, 2015
I have hierarchical data such as:
Id Level ParentId
1 0 1
2 1 1
3 2 2
4 0 4
5 1 4
6 0 6
7 1 6
8 2 7
9 3 8
10 4 9
11 0 11
As you can see even the parent element has parentId(in this case id = parentid)
How can I select the lowest level data in the hierarchy and get this result:
Id Level ParentId
3 2 2
5 1 4
10 4 9
11 0 11
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Aug 4, 2005
Hi, I'm having some difficulty creating the SQL Statement for getting some data from a table:
I have the following table of data
__User___Votes___Month
__A_______14______2__A_______12______3__A_______17______4__A_______11______5
__B_______19______2__B_______12______3__B_______15______4
I want to beable to pull out the total number of votes a user has had over a period of months.
eg Total up each users users votes for months 4 and 5
that would give:
__User____TotalVotes
___A________28___B________15
An added complecation is that user B does not have any data for month 5
Any help or pointers would be fanstatic
Many thanks
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Feb 27, 2008
Hi,
I like to get data from a signle table and arranged in hierarchical(hierarchy) order. What will be my sql script to be able to get the desired result shown below? Please include some explanation as too what script is doing..
Table Structure and Sample Data
Id ParentId Name Code DisplayOrder
1 null Group 1 G00001 1
2 null Group 2 G00002 2
3 1 Sub-Group 1 SG0001 1
4 2 Sub-Group 2 SG0002 1
5 3 Sub-Sub-Group 1 SSG001 1
6 null Group 3 G00003 3
7 3 Sub-Sub-Group 2 SSG002 2
Desired Result
Id ParentId Level Name ExtendedName DisplayOrder
1 null 1 Group 1 Group 1 1
3 1 2 Sub-Group 1 Group 1 -> Sub-Group 1 1
5 3 3 Sub-Sub-Group 1 Group 1 -> Sub-Group 1 -> Sub-Sub-Group 1 1
7 3 3 Sub-Sub-Group 2 Group 1 -> Sub-Group 1 -> Sub-Sub-Group 2 2
4 2 2 Sub-Group 2 Group 1 -> Sub-Group 2 1
2 null 1 Group 2 Group 2 2
6 null 1 Group 3 Group 3 3
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May 9, 2008
Hi all!
I am trying to organize a hierarchical data structure into a table. I need to have the possibility to set 2 parents for some nodes. Curently I see following two options:
Example 1
id parent_id name-----------------------------------1 0 Level 1 Parent A2 0 Level 1 Parent B3 1,2 Level 2 Child
Example 2
id parent_id name-----------------------------------1 0 Level 1 Parent A2 0 Level 1 Parent B3 1 Level 2 Child3 2 Level 2 Child
Is any of the two examples valid database logic wise? In fact, is it possible to achieve the requirement by using only one table?
Thanks in advance,
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Mar 10, 2015
selecting table data in hierarchical XML .
Here is the sample table DDL and data
Declare @continents Table
(
id int identity (1,1)
,continent_id int
,continent_Name varchar(100)
,continent_surface_area varchar(100)
,country_id int
[code]....
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Sep 24, 2015
I am have a situation to insert data from multiple sources to a single table.
i.e., multiple and concurrent insert on same table
Will it lead to dead lock at any point? is there any possibility?
How insert will work ? What is the architecture ? Any references to read?
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Jul 20, 2005
I'm trying to come up with an elegant, simple way to compare twoconsecutive values from the same table.For instance:SELECT TOP 2 datavalues FROM myTable ORDER BY timestamp DESCThat gives me the two latest values. I want to test the rate ofchange of these values. If the top row is a 50% increase over the rowbelow it, I'll execute some special logic.What are my options? The only ways I can think of doing this arepretty ugly. Any help is very much appreciated. Thanks!B.
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Aug 28, 2007
I apologize if this has been asked, but I can't find a complete answer.
We have a situation with parent/child tables which have an identity column as their PK. We need to be able to insert into the live tables from staging tables. The data in the staging tables are related via a surrogate key.
I have found the OUTPUT clause, but that can only refer to columns of the actual table (since there is no FROM clause in an INSERT). Our current best solution to this problem involves adding bogus "staging" columns to the destination tables, and removing them after we've inserted everything from staging. This is an unattractive solution to say the least.
I'll give an example that mirrors our actual solution, and ask if anyone has a better solution?
----------
Code Snippet
CREATE TABLE [dbo].[TABLE_A](
[ID] [int] IDENTITY(1,1) NOT NULL,
[DATA] [nchar](10) NOT NULL,
[STAGING_COLUMN] [bigint] NULL,
CONSTRAINT [PK_TABLE_A] PRIMARY KEY ([ID] ASC)
)
GO
CREATE TABLE [dbo].[TABLE_B](
[ID] [int] IDENTITY(1,1) NOT NULL,
[A_ID] [int] NOT NULL,
[DATA] [nchar](10) NOT NULL,
[STAGING_COLUMN] [bigint] NULL,
CONSTRAINT [PK_TABLE_B] PRIMARY KEY ([ID] ASC)
)
GO
ALTER TABLE [dbo].[TABLE_B]
ADD CONSTRAINT [FK_TABLE_A_TABLE_B] FOREIGN KEY([A_ID]) REFERENCES [dbo].[TABLE_A] ([ID])
GO
CREATE TABLE [dbo].[STAGE_TABLE_A](
[A_Key] [bigint] NOT NULL,
[DATA] [nchar](10) NOT NULL
)
GO
CREATE TABLE [dbo].[STAGE_TABLE_B](
[B_Key] [bigint] NOT NULL,
[DATA] [nchar](10) NOT NULL,
[A_Key] [bigint] NOT NULL
)
GO
The STAGING_COLUMN columns are the ones that will be added before, and dropped after.
Code Snippet
DECLARE @TABLE_A_MAP TABLE (
A_ID INT,
A_Key BIGINT
)
INSERT INTO TABLE_A (DATA, STAGING_COLUMN)
OUTPUT INSERTED.ID, INSERTED.STAGING_COLUMN INTO @TABLE_A_MAP
SELECT DATA, A_Key FROM STAGE_TABLE_A
INSERT INTO TABLE_B (A_ID, DATA)
SELECT TAM.A_ID, STB.DATA
FROM STAGE_TABLE_B STB INNER JOIN @TABLE_A_MAP TAM ON TAM.A_Key = STB.A_Key
This seems to work, but I'd really like another alternative. Even though this is happening when nobody else is using the database, I cringe at the thought of adding and removing columns just to make this work.
Here are a few of my constraints:
The above is a simplification of the actual problem. The actual problem goes about five levels deep (hence the B_Key in STAGE_TABLE_B). At the top level, our larger customer will have 100,000 rows to insert. Each level will average 3 times as many rows as the next higher level, so we're talking about real volumes here.
This has to finish over the course of a weekend.
This has to be delivered to QA this Friday
Thanks for any help or insight.
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