Database Table - Hierarchical Query
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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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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Mar 26, 2008
Hi. I'm trying to find out which "cases" have a new items added to our database. I have provided a sample layout.
ID ParentID Name CreateDate
358 2 SMITH, JOHN 3/3/2008 11:15:23 am
359 358 Invoice 3/5/2008 4:13:52 pm
360 358 Shipping 3/5/2008 5:11:09 pm
361 358 Receiving 3/6/2008 4:22:01 am
The main ID for this is 358. The invoice, shipping, and receiving items are child items. I would like to run a query that can report which cases have newly added items. This is hierarchical I guess and I'm quite lost. I hope this makes sense. Thanks for any help!
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Nov 17, 2014
I have created a store procedure as below:
WITH TextType AS
(
SELECT AppTxtTypeId,AppTxtTypeCode, AppTxtTypeParentCode, Name,Description,Active,SortOrder ,0 as TypeLevel,AppTxtTypeId as parentId
FROM [ApplicationTextTypes]
WHERE AppTxtTypeParentCode IS NULL
[Code] ....
From this i am able to get data in the below format:
Parent
--Child1
--Child2
---Subchild1-Child1
---Subchild2-Child1
---Subchild1-Child2
---Subchild2-Child2
Actually my requirement is :
Parent
--Child1
---Subchild1-Child1
---Subchild2-Child1
--Child2
---Subchild1-Child2
---Subchild2-Child2
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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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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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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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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. Â The trick is that it can be at any level, but I don't know which level it is at. Â 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'. Â 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. Â 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'. Â I should only get 1 row each time.
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Dec 27, 2005
What is the best approach for storing hierarchical
data in a database? For example, if I need to store a tree menu system,
how would I do that allowing for the most normalization within the
database, using the least number of queries/resources when pulling the
data out, and using the least amount of overhead both in storage and
retrival?
-Chris
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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 02 Boxes 0 03 Toys 0 04 Bedroom 1 Custom Furniture 15 Dining 1 Custom Furniture 16 Accessories 1 Custom Furniture 17 Picture Frames 6 Accessories 28 Serving Trays 6 Accessories 29 Entertainment 1 Custom Furniture 110 Planes 3 Toys 111 Trains 3 Toys 112 Boats 3 Toys 113 Automobiles 3 Toys 114 Jewelry 2 Boxes 115 Keepsake 2 Boxes 116 Specialty 2 Boxes 1Desired output:Custom Furniture Accessories Picture Frames Serving Trays Bedroom Dining EntertainmentBoxes Jewelry Keepsake SpecialtyToys Automobiles Boats Planes Trains
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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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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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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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Jun 25, 2007
Hi, all experts here,
I am wondering if tempdb stores all results tempararily whenever I query a large fact table with over 4 million records which joins another dimension table? Since each time when I run the query, the tempdb grows to nearly 1GB which nearly runs out all the space on my local system drive, as a result the performance totally down. Is there any way to fix this problem? Thanks a lot in advance and I am looking forward to hearing from you shortly for your kind advices.
With best regards,
Yours sincerely,
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Mar 9, 2006
Hi,
Does anyone has query to give all table sizes on a database?
Appreciate your help.
Thanks
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Oct 6, 2005
hi, i've got problem on how to query my two tables:Table statuslogFIELDS: row1 row2ActId : 1 2ActDate : 2005-9-19 2005-9-18PIN(employee) : P120 P120ProjCode : 1234 123ActCode : B IMap# : map1 kd145RegHrs : 0.5 7.0OtHrs : 0 2.0Status(%) : 20 100
Table DalsDataNewFIELDS: row1 row2ID : 24 25Date : 2005-9-19 2005-9-18PIN(employee) : P120 P120ProjCode : 1234 123ActCode : B IActMedium : W(PC) W(PC)Map# : map1 kd145RegHrs : 0.5 7.0OtHrs : 0 2.0Flag : 0 1Approved by : P084 P083
if you will notice some fields of my tables have same value. these are: Date,ProjectCode,ActCode,RegHrs,OtHours
what i would like my output(data) to be in my datagrid:ActId,ID,Date,ProjectCode,ActCode,ActMedium,RegHrs,OTHrs,Status,Flag,Approved by
i have this query in 1 table only."SELECT * FROM statuslog WHERE statuslog.Pin = '"+Session("user")+"' and statuslog.ActDate >= '"+DateFirst+"' and statuslog.ActDate <= '"+DateEnd+"' ORDER BY statuslog.ActDate DESC"
but what i would do now is to query the two tables and same where clause in the query above.
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Feb 27, 2008
I have two tables in my database: order_id with fields order (text) and comp_ID (int) and another table called customers with comp_ID (int) and company name (text) and other company information fields. The link between the two tables is the comp_ID. With every order that's made the company that made the order is stored with it in the order_id table. If I type in the order id (text), I want to be able to use the order id to search the order_id table and find out what the comp_ID of the company that made that order is. Then use that comp_ID to pull up the record of company information from the customers table with the same comp_ID. Is there some way to do this in one query? Or how do I accomplish this?
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Dec 15, 2014
I have a view saved on server - mhsvi-datawarehousedatawarehouse.This view, in it's TSQL connects to a databasethat is set up as a linked server. That server is mhsvi-sql2008ainstance1.When I try to add the view to Excel in order to automatically refresh for users as a report - I get the following error - (I get it as well)
The query did not run, or the database table could not be opened.Check the database server or contact your database administrator. Make sure the external database is available and hasn't been moved or reorganized, then try the operation again.I have access to the database where the view is saved and the database that the TSQL calls.
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Mar 27, 2008
I am designing database that will store clinic and doctor information.
1) A clinic can have doctors and staff members.
2) A clinic can belong to another clinic.
3) A doctor can practice on his/her own practice/clinic and still belong to another clinic.
I will email my current design if needed.
Thanks,
Stephen Cantoria
scantoria@msn.com
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Apr 21, 2006
Hello,
Can anyone point me at a tutorial or sample that shows how to use IS for importing an xml file containing hierarchically arranged records ?
I have a file which contains multiple orders , the orders contain multiple line items.. the file also contains an element with details of the file source etc...
So, I want to make an insert in the FileLog table an then make inserts into the orders table .. then make inserts into the OrderItems table which will have the foreign key from the orders table in the records...
if you get what I mean...
But I have searched hign and low and can't see any info on how to load anything but a very flat xml file structure...
Thanks
Vida.
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Aug 23, 2006
I have a table consisting of 3 columns: Parent varchar(50), Child varchar(50), Pop int.
The table is setup as follows:
Parent Child Pop
----------------------------------
Europe France 0
France Paris 1
New York New York City 10
North America United States 0
North America Canada 0
United States New York 0
United States Washington 0
Washington Redmond 200
Washington Seattle 100
World Europe 0
World North America 0
This is just some sample data modified a tiny bit from an example of a hierachical print out sample that is a stored procedure that allows me to pass any place and see all of that place's children/grandchildren.
I need to figure out how to write a query to show me cumulative sums (ROLLUP?) of the whole tree. So the output should basically be something like this (it can include parent and child columns too):
World Null 311
World Europe 1
Europe France 1
France Paris 1
World North America 310
North America United States 310
North America Canada 0
United States New York 10
United States Washington 300
New York New York City 10
Washington Redmond 200
Washington Seattle 100
Hopefully you understand what i'm looking for. I've tried using WITH ROLLUP and I also tried using an Inner Join but I'm not really sure what I need to do to pull this off. I seem to only be able to get it to work 1-2 levels deep but not through the whole tree.
Any help/ideas would be appreciated! Thank you.
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Sep 24, 2006
Is there a way I can write a query to dynamically select a database table. That is, instead of having a variable for a certain column like customerId which would be €œcustomerID = @customerID€? I want to use the variable to select the table. I assume I may have to use a stored procedure but I am unclear as to how this would be coded.
Thanks
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Jul 16, 2015
I need a query to list the tables in SQL sever with respective database they belong across databases.
I can obtain list of tables from Sys.Tables / Sys.Objects Views but how do I correlate to which DB a table belongs to?
The Sys.Databases View list the  databases with their respective Ids. But, the DBID is not part of Sys.Tables / Sys.Objects Views.
Which View will allow me to fetch database to table mappings?Â
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Jul 20, 2005
I want to use fabricated hierarchical recordset in VB6 using ADO. I wrotecode likedim rs as adodb.recordestset rs=new adodb.recordestrs.fields.append "a1",adChar,30Then in loop I putrs.addnewrs("a1")=...re.updatewhen I associated this with hierarchical flexgrid I saw what I expected. Onthe next step I added liners.fields.append "a2",adChapterand this operator gave me error that I use wrong parms. Then I realized thatI should use specific connection. But with this connection adChar stopped towork also. Is it possible to resolve this problem?--Aleks Kleynhttp://www.geocities.com/aleks_kleyn
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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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May 25, 2006
I have a query like this
with TempCTE(id, Name, level, sortcol)
As
(
Select id, Name, 0 as level,
cast(cast( id AS BINARY(4)) as varbinary(100)) sortcol
from Table1
where id = 1
union all
Select id, Name, 0 as level,
cast(sortcol + cast( id AS BINARY(4)) as varbinary(100)) sortcol
from Table1 inner join TempCTE on TempCTE.id = Table1.parentid
)
select * from TempCTE order by sortcol
My problem is I want to sort this hierarchical resultset further on name like
aaa
-----aaaa
-----bbbb
-----cccc
------------aaaaa
------------bbbbb
-----dddd
------------aaaaa
------------bbbbb
bbb
-----aaaa
-----bbbb
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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Sep 11, 2006
Hi All, Please let me know how we can need to run “SELECT” statement (in SQL SERVER query analyzer) for a table in different database without going/loading DATABASE B (i.e. without running “USE B”) e.g. we are in a database “A” and we need to run “SELECT” command for a table in Database say “B” without going/loading (i.e. without running “USE B”) the Database “B” Thanks in Advance J
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Oct 30, 2015
I have a set of data spread across a number of tables regarding stock market data. An example of this follows:
Market Capitalization...
Date CompA CompB
01/01/11 100 5
02/01/11 102 4
Share Price....
Date CompA CompB
01/01/11 100 100
02/01/11 101 99
Event Data...
Date Company
01/01/11 CompA
02/01/11 CompB
Pretty simply, I need a way to retrieve the market capitalisation and share price data based on the event data. So for instance I say 'oh, there is an event on the 01/01/11 involving company A, the market capitalisation on this day was 100, then for the next event it was 4 for company B.
I can also transpose the data so that the company name is in the rows and the dates in the columns for the market cap and share price tables, but this leads to the issue that when I try and get the data, I don't know how to query the correct company for that date.
For instance:
SELECT Event.Date, Event.Company
FROM Event
how do I now say.....
SELECT MarketCapitalisation.Column
WHERE Column = Event.Company
AND MarketCapitalisation.Date = Event.Date.
I have played around with a few basic joins, but I am having issue with the principle of that second to last line of SQL (so only getting the correct column).
I still have a copy of the data in excel so can flip things around as needed, but that would only mean that I would have the issue of WHERE Column = Event.Date instead of Event.Company.
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May 2, 2007
Hello All,
I am working on constructing a software layer around some features of the RDL language that would allow me to programatically generate reports.
I am reading the RDL specification language, and I do not understand three things:
1) How the DataSet element is populated by the query or more precisely how do the <Field> elements capture all the rows inside the table that is being queries?
To my understanding I wilkl have to define several fields that correspond to all columns of interest in the query.
But that is only for one row (?!) How do the rest of the rows get populated? Does the server recursively create new rows based on my definitions until it matches row for row all the data in the table?
2) Once the elements are inside a DataSet how do make use of that data to render it in a table.
I understand how the DataSource, DataSet, and Table work individually, yet I do not understand how to establish a flow of data between DataSet and Table.
3) Do I even need to use a <Table> as an RDL element in order to organize the data in an excel table?
I would appreciate any help. Thank you!
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May 20, 2015
I'm wondering if there is some sql I can run to check properties on a table. This would be used to verify things like data types, allow nulls and default values have been set to avoid mistakes. This could be done manually one table and one column at a time, but it would be a lot easier to look at it in the results window.
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