I'm trying to create a "Self-Referential, Many-to-Many" relationship under the Database Diagrams section in Sql Server 2005 express and I'm having a heck of a time figuring out where to click and edit to create what I want.
The url below links to the pictorial represenation of what i'm trying to create. Any help is greatly appreciated. Thanks!
http://www.communitymx.com/content/source/A1A63/diag.gif
Hello everyone, this is my first time to these boards. I've been running all around for the last few days trying to solve a problem. So far, on 3 forums, we haven't been able to find a solution.
I am using MS SQL 2005 Workgroup. I have catalog of events on my site. Each event can have a little as 0 up to an unlimited amount of Photos attached to them(in a seperate table.) Here's the basic breakdown.
catalog
-----------
id - PK
act_name
(price and other such info)
Photos
-----------
id - PK
path_to_photo
event_id - FK(catalog.id)
What I'm trying to do is select all the events in the catalog, and order them by the number of photos they have in the photos table. The idea is to get the events that have photos at the top of the list.
here is the query that I'm using right now.
Code:
SELECTCOUNT(photos.id) AS PhotoCount, catalog.id AS item_id, catalog.company, catalog.act_name,
catalog.location, catalog.price_adult,
catalog.price_child, catalog.short_description, catalog.photo, catalog.children_allowed,
catalog.long_description, catalog.online,
catalog.act_type, event_types.act_type AS evt_type,
event_types.id AS event_id, catalog.rank, catalog.length, catalog.bullets,
photos.id
FROM catalog, event_types, photos
WHERE catalog.act_type = event_types.id
AND photos.event_id = catalog.id
GROUP BY COUNT(photos.id), catalog.id, catalog.company, catalog.act_name
ORDER BY photos.id, catalog.id, catalog.company, catalog.act_name
Which returns the following error.
Column 'catalog.location' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
No matter what I do, I always seem to get an error. I've removed the Count in the select list, and that tells me that I cannot call Aggregate functions in the Group By list.
Anyone got an idea what I'm doing wrong?
Thanks in advance,
Morgan
For example, the table below, has a foreign key (ManagerId) that points to EmployeeId (primary key) of the same table.
-------Employees table--------
EmployeeID . . . . . . . . . . int
Name . . . . . . . . . . . nvarchar(50)
ManagerID . . . . . . . . . . . int
If someone gave you an ID of a manager, and asked you to get him all employee names who directly or indirectly report to this manager.
How can that be achieved?
Hi all, I have the following SQLDataSource statement which connects to my Gridview:<asp:SqlDataSource ID="SqlDataSourceStandings" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>" SelectCommand="SELECT P.firstName, P.lastName, T.teamName, IsNull(P.gamesPlayed, 0) as gamesPlayed, IsNull(P.plateAppearances,0) as plateAppearances, IsNull( (P.plateAppearances - (P.sacrifices + P.walks)) ,0) as atbats, IsNull(P.hits,0) as hits, P.hits/(CONVERT(Decimal(5,2), IsNull(NullIF(P.atbats, 0), 1))) AS [average], (P.hits + P.walks)/(CONVERT(Decimal(5,2), IsNull(NullIF( (P.atbats + P.sacrifices + P.walks) , 0), 1))) AS [OBP], (P.hits - (P.doubles + P.triples + P.homeRuns) + (2 * P.doubles) + (3 * P.triples) + (4 * P.homeRuns)) / (CONVERT(Decimal(5,2), IsNull(NullIF(P.atbats, 0), 1))) AS [SLG], P.singles, P.doubles, P.triples, P.homeRuns, P.walks, P.sacrifices, P.runs, P.rbis FROM Players P INNER JOIN Teams T ON P.team = T.teamID ORDER BY P.firstName, P.lastName"></asp:SqlDataSource>There are 8 teams in the database, and somehow the average and obp results are as expected for all teams except where T.teamID = 1. This doesn't make sense to me at all! For example, I get the following results with this same query: First NameLast NameTeamGPPAABHAVGOBPSLG1B2B3BHRBBSACRRBI
BrianAustinHope83432230.7187500.7352941.15625014612201221
GabrielHelbigSafe Haven62119141.0000000.9375002.1428576404111519
MarkusJavorSafe Haven82927200.8695650.8000001.21739114501021218
RobBennettMelville83029240.8275860.8333331.55172411904102117
AdamBiesenthalSafe Haven82929210.9130430.9130431.56521712631001015
ErikGalvezMelville82625180.7200000.7307691.24000011322101015 As you can see, all teams except for Safe Haven's have the correct AVG and OBP. Since AVG is simply H/AB, it doesn't make sense for Gabriel Helbig's results to be 1.00000. Can anyone shed ANY light on this please?Thank you in advance,Markuu ***As a side note, could anyone also let me know how I could format the output so that AVG and OBP are only 3 decimal places? (ex: 0.719 for the 1st result)***
I have a scenario like below
Product1
Product2 Product3
Product4 Product5
Product1 1
1 0 0
1
Product2 1
1 0 0
1
Product3 0
0 1 1
0
Product4 0
0 1 1
0
Product5 1
1 0 0
1
How to design tables in SQL Server for the above.
SELECT
[List1].[TITLE],
[List1].[FORENAME],
[List1].[SURNAME],
[List1].[JOB]
FROM List1
WHERE EXISTS(
SELECT [List2].[forename] FROM [List2]
WHERE [List2].[forename] = [List1].[FORENAME]
AND [List2].[surname] = [List1].[SURNAME]
AND [List2].[email] = [List1].[EMAIL]
)
I am on the right track here, aren't I?
That query will.. sort of... loop through List1, get the "current" records firstname, surname and email, and then go and see if there's any single record in List2 that contains exactly that combination of values in those fields. It's a stupid question but I'm not the brightest of sparks and BOL leaves me even more confused. I'm just worried in case it's going "well, record 34 matches the current firstname and record 96 matches the current email, so EXISTS returns true".
Assuming I've got it right, though - many of the records that I know to be duplicates have a NULL email address. And the query above seems to be automatically removing them. If there's a record in both List1 and List2 with identical firstname and surname, and both have NULL email addresses - should the query above pick it up? If not, how can I include those records?
I have the following bit of code that is an onclick event to save information in text boxes and list boxes. I cut out a bunch that was irrelevant to this because ALL items in the text boxes save fine. My biggest question that should lead to the answers for the rest of the code, is for lines 53-57... That stored proceedure does not appear to run. All it is set to do is and the code is DEFINITELY getting passed into it but it almost seems like it isnt and therefoe isnt doing anything. I get no errors, just nothing happens. I would of thought at the very least, it should run this proceedure and delete the information from the table even if it wouldnt save the new information based on the listboxes.
I am not sure if I am explaining this correctly, but if anyone has any thoughts, I would greatly appreciate it.
The delete proceedure that isnt actually making a changeALTER PROCEDURE [dbo].[Delete_Team_Data]
(
@Code as int
) AS
DELETE from tblSectyData2 where Code = @Code
DELETE from tblSectyData2 where SectyCode = @Code
The actual code
1
2
3 protected void SaveChanges(object sender, EventArgs e)
4 {
5
6 string selectedEmployee = "";
7 selectedEmployee = EmployeeList.SelectedValue;
8
9
10
11 string fName = "";
12 //Snipped out a bunch of code relating to the text boxes
13 string secretaryCode = "";
14
15 fName = txtFName.Text;
16 //Snipped out a bunch of code relating to the text boxes
17 secretaryCode = TeamList2.SelectedValue.ToString();
18 int selemp = Convert.ToInt32(selectedEmployee);
19
20
21
22
23 String Conn = (string)Application["Facebook"];
24 SqlConnection IntranetConnection;
25 SqlDataReader IntranetReader;
26 IntranetConnection = new SqlConnection(Conn);
27 //SaveEmpChanges works properly.
28 SqlCommand SaveEmpChanges = new SqlCommand("Exec dbo.Edit_Employee_Data '" + prefix + "','" + lName + "','" + fName + "','" + mName + "','" + pos + "','" + dept + "','" + directdial + "','" + ext + "','" + fax + "','" + hphone + "','" + cphone + "','" + partner + "','" + timekeeper + "','" + notary + "','" + practice + "','" + saddress + "','" + sphone + "','" + lnl + "','" + bar + "','" + oemail + "','" + haddresscom + "','" + haddress + "','" + hcity + "','" + hstate + "','" + hzip + "','" + school + "','" + degree + "','" + status + "','" + floor + "','" + code + "','" + email + "','" + language + "'", IntranetConnection);
29 //Delete Team does NOT work
30 SqlCommand DeleteTeam = new SqlCommand("Exec dbo.Delete_Team_Data '" + selemp + "'", IntranetConnection);
31 //GetEmployeeType does work
32 SqlCommand GetEmployeeType= new SqlCommand("Select EmpType from tblMain2 where Code = '" + selectedEmployee + "'", IntranetConnection);
33
34 IntranetConnection.Open();
35 IntranetReader = SaveEmpChanges.ExecuteReader();
36 IntranetReader.Close();
37 IntranetConnection.Close();
38
39
40
41
42 int count = 0;
43 string LinkT = "";
44 string LinkT2 = "";
45
46 string etype = "";
47
48 lselemp.Text = selectedEmployee;
49 //Basically, while the page loads fine, it does NOTHING below this line... Ive comments out sections, I have also put in a bunch of labels in to show the variables being passed, it all seems fine.
50
51
52
53 IntranetConnection.Open();
54 IntranetReader = DeleteTeam.ExecuteReader();
55 IntranetReader.Close();
56 IntranetConnection.Close();
57
58
59 IntranetConnection.Open();
60 IntranetReader = GetEmployeeType.ExecuteReader();
61 while (IntranetReader.Read())
62 {
63 etype = IntranetReader["EmpType"].ToString();
64 }
65 IntranetReader.Close();
66 IntranetConnection.Close();
67
68 int end = Convert.ToInt32(TeamList2.Items.Count);
69 string teamcode = "";
70
71 while (count < end)
72 {
73
74 teamcode = TeamList2.Items[count].Value.ToString();
75
76 if (etype == "S")
77 {
78 LinkT = "Secretary";
79 LinkT2 = "Works with";
80 }
81
82 else if (etype == "O")
83 {
84 LinkT = "Works with";
85 LinkT2 = "Secretary";
86 }
87
88
89
90 //This command does not work
91 SqlCommand saveTeam = new SqlCommand("Exec dbo.Add_Team_Data '" + selemp + "','" + teamcode + "','" + LinkT + "','" + LinkT2 + "'", IntranetConnection);
92
93
94 IntranetConnection.Open();
95 IntranetReader = saveTeam.ExecuteReader();
96 IntranetReader.Close();
97 IntranetConnection.Close();
98
99
100 count++;
101 }
102
103
104
105
106 Response.Redirect("ManageEmployeeDirectory.aspx");
107 }
108
Hi,
I have an interesting query problem. The result needs to be a single recordset as from a select statement, here's the prerequisites:
Tables:
tShip
tPerson
tAddress
tCertificate, has a field dtmExp (datetime)
where each Ship has one or more Persons which have one or more Addresses and each ship has one or more certificates.
Now, I need the query to return all ships, all persons and all addresses for those persons BUT ONLY the certificate with the latest expiration date (sort of like the result from a 'select top 1 from tCertificate order by dtmExp desc')
How can this be packed into one query? using inner joins on all tables will return multiple rows for each certficate for a ship, which it must not.
Any help greatly appreciated!
-. Balt
Ok, I'm doing a football database for fixtures and stuff. The problem I am having is that in a fixture, there is both a home, and an away team. The tables as a result are something like this:
-------
Fixture
-------
fix_id
fix_date
fix_played
----
Team
----
tem_id
tem_name
-----------
TeamFixture
-----------
fix_id
tem_id
homeorawayteam
goals
It's not exactly like that, but you get the point. The question is, can I do a fixture query which results in one record per fixture, showing both teams details. The first in a hometeam field and the second in an away team field.
Fixture contains the details about the fixture like date and fixture id and has it been played
Team contains team info like team id, name, associated graphic
TeamFixture is the table which links the fixture to it's home and away team.
TeamFixture exists to prevent a many to many type relationship.
Make sense? Sorry if this turns out to be really easy, just can't get my head around it at the mo!
It's a dream of human beings to build machines that can think andbehave like human beings. The most important part of of such a machineis an artificial mind that can emulate the cognitive processing ofhuman mind.This book, "Next Generation Artificial Intelligence, Artificial Mind -Part One - Basic Architecture and Cognitive Structure" introduces abasic artificial mind architecture and computational model forcognitive processing. Inside the book, three important cognitiveprocess modeling components, mental objects network (MON),associative-learning mechanisms and a concept formation principle areintroduced. Based on the architecture and the computational model, onecan develop his own model of artificial mind according to his ownspecific requirements.The first edition of Artificial Mind - Part One is now available forpurchase from the author's personal web site. The price of the e-bookis USD7.00 (seven US dollars). An evaluation edition of this e-book isalso available for download from the web site.The author's personal web site:http://www.geocities.com/tomwingmak/
View 1 Replies View RelatedI actually work in an organisation and we have to find a solution about the data consistancy in the database. our partners use to send details to the organisation and inserted directly in the database, so we want to create a new database as a buffer database to insert informations from the partners then make an update to the main database. is there a better solution instead of that?
View 6 Replies View RelatedHello everyone,I have a webcontrol that uses database-structures alot, it uses the system tables in SQL to read column information from tables. To ease the load of the SQL server I have a property that stores this information in a cache and everything works fine.I am doing some research to find if there are anyway to get information from the SQL server that the structure from a table has changed.I want to know if a column or table has changed any values, like datatype, name, properties, etc.Any suggestions out there ?!
View 3 Replies View RelatedI have a system that basically stores a database within a database (I'msure lots have you have done this before in some form or another).At the end of the day, I'm storing the actual data generically in acolumn of type nvarchar(4000), but I want to add support for unlimitedtext. I want to do this in a smart fashion. Right now I am leaningtowards putting 2 nullable Value fields:ValueLong ntext nullableValueShort nvarchar(4000) nullableand dynamically storing the info in one or the other depending on thesize. ASP.NET does this exact very thing in it's Session State model;look at the ASPStateTempSessions table. This table has both aSessionItemShort of type varbinary (7000) and a SessionItemLong of typeImage.My question is, is it better to user varbinary (7000) and Image? I'mthinking maybe I should go down this path, simply because ASP.NET does,but I don't really know why. Does anyone know what would be the benifitof using varbinary and Image datatypes? If it's just to allow saving ofbinary data, then I don't really need that right now (and I don't thinkASP.NET does either). Are there any other reasons?thanks,dave
View 7 Replies View RelatedHi All,Can u please suggest me some books for relational database design ordatabase modelling(Knowledgeable yet simple) i.e. from which we couldlearn database relationships(one to many,many to oneetc.....),building ER diagrams,proper usage of ER diagrams in ourdatabase(Primary key foreign key relations),designing smallmodules,relating tables and everything that relates about databasedesign....Coz I think database design is the crucial part of databaseand we must know the design part very first before starting up withdatabases.....Thanks and very grateful to all of you....Vikas
View 3 Replies View RelatedHi All,
I am designing database where few of the master tables will reside in different database or in case different server. Scenario is
Server "A" with Database "A" may host the "Accounts" table.
Server "B" with Database "B" may host the "Product" table.
I am designing database "Project" which will hosted in Server "A".
My application requires this master tables [readonly access] as data inserted in my application refers this tables. Also there are reports to be generated which refer this tables.
How do i design my database and sql queries?
I am thinking of approach of having equivalent tables created in my database and writing service which keep tables in my database in sync. This will ensure good perfomance during transaction and reports as they will need to refer this table locally as opposed to different database or different server.
Any thoughts on above approach?? or any better/standard way for such scenarios ?
Thanks in Advance. Your inputs will be of great help.
Hello:
My client has a db with the following structure:
Online US Searchable Map of the 50 US States. Users search criteria is the following: Query records by selecting state, county, then record. Each County table has 10-20 tables. All databases combined = 500MB and TLogs = 100MB.
How would you re-design a relational DB where users could query data by state-county-record. Currenty the DB's are created by the County of each state which creates hundreds of DB's in SQLServer with no realtionship to each US state. What would be the best design to ensure good performance, data integrity and maintenance? Would you create 1 DB with all 50 states, create 4 DB's and divide by region(N,S,E,W), 50 DB's of each state or leave it as is with each county it's on DB? Any suggestions would be appreciated.
thx
rob
Table Name= t1
uid subject marks
1 physics 68
1 chemistry 70
1 maths 80
1 english 75
2 physics 78
2 chemistry 56
2 maths 68
2 english 59
3 physics 54
3 chemistry 67
3 maths 77
3 english 59
query: i need sum of marks of physics,chemistry and maths
of each uid (english not included)
Thanks in Advance
Harry
Hello, I am designing my first database with 5 tables for a demo project and am not sure if it works. an example below.2 of the many things I want visitors to the site to do is find a company by the industry sector they belong to,..andwhat sort of service or products they can supply. For instance a Employment agency maybe under professional services Table 1 Customer Customer_ID = primary key,,,, Sector_ID = Foreign keyComapany Name, Address, Phone, Postcode etcTabel 2 Industry SectorsSector_ID = primary key,,,,Customer_ID= foreign key banking, Education,Prof Services, etc Table 3 Trading ActivityTrading_ID = primary key,,,,Sector_ID = Foreign key, Products_ID= FkEmployment Agent, School, Lawyer etcTable 4 ProductsProducts_ID = primary key,,,,Trading_ID = foreign keySupply frozen foods, transport services, sports goods, etc Table 5 Account Account_ID = primary key,,,,Customer_ID = foreign keyAccount Name, Credit Limit, Payment Terms, Open date, Account contact etc One big point of confusion is, can I have the Customer_ID from the principal Customers tablein every table as a foreign key or must the tables be chained together one after the other as such. Advice appreciatedThanks
View 1 Replies View RelatedHi,
I need a hand with designing a database.
I am collecting results from a survey which has the following questions:
Call ref? How did you place your support call? Were you satisfied with the amount of time you had to wait until getting acknowledgement of the support call placed? 1 = very satisfied and 10 = very unsatisfied. How happy were you with the customer service you received upon placing the support call? 1 = very unhappy and 10 = very happy.How satisfied were you with the amount of time you had to wait until you heard from an engineer? 1 = very satisfied and 10 = very unsatisfied. How satisfied were you with the time taken to get your problem/query resolved? 1 = very satisfied and 10 = very unsatisfied Did you feel the engineer had enough knowledge to deal with your call? 1 = very good and 10 = not very good Overall how satisfied were you with the support call placed? 1 = very satisfied and 10 = very unsatisfiedIs there anything we can do to improve the quality of the support and service you received?
I want to store this in a database. Obviously I want to use best practice for design, normalisation etc. The stumbling block I am coming accross is the fact that each question has a number and each question has a score from 1 to 10 and storing this in the database. Any help appreciated!
Thanks
Andrew
I am creating database tables for company testimonials. Database columns: name, position, companyname, comment, service we provided.
My question is that for each company - may have a multitude of different services from us, and different people with different positions in the same company may make comments.
What is best practice for putting this db structure together?
Thanks
Andrew
Can anyone tell me how can i design database architecture for the Table Category & Product...so that i can make N-level entity relation....I have database in SQL SERVER 2000.
View 2 Replies View RelatedI guess I am confused about something and need some help. I am looking at a database schema for about 20 tables in a database. I noticed that the firstcolumn in each table Is some type of Id. For example StudentId,TestId etc.Where the Id is a unique numeric sequential value.
So I have some questions?1- Do these Id's act as what are called indexes for the table?(Unique indexes)2- If the answer to 1 is correct, then how do I create these unique indexes? Is it as simple as declaring the Id column as the primary key and that this value will be generated automatically upon insert? 3- Is it necessary to have an Id column for every table, or may I only do it for a few of them?4. In relation to Question2, what do I need to do, so that the Id column will automatically be created when someone inserts a value into the database table with an ID column.
For example here are two sample tables
StudentsInfo
StudentId<PK> Name Age 1 Mark 33 2 Jill 23 3 Mary 25
PersonalInfo
Name<FK> SocialSecurity Address MajorMark 324-444-3342 15 Elm ArtJill 888-888-8998 21 North ScienceMary 876-777-2344 18 Byle Music
Hi,I am planning to create a technical forum for our college. could any one give me an idea of how to design the database for the forum. what table and columns i should have?
View 4 Replies View RelatedI have got a design issue.I have got 4 tables,having relationships.Now,user will edit records and save them,but I want to save the values which were exixsting before they were edited and saved.Implying,if a record is edited 50 times,then the values of each edit needs to be saved.How best ,can I achieve this.
View 3 Replies View RelatedHi !!We are designing a system where we ask people for their interests and store in into the database and send customize email. Following are the questions:1) Should we use Identity column as Primary Key and CustomerID column? OR we should create Custom CustomerID and use it as Primary Key? (I have read few articles about Identity column as Primary or not Primary, but need little advice what to accept)2) We have a Tables called : Interest & Customer_InterestCustomer Table:CustomerID, Customer Name, Address, Email, Signup DateInterest Table:InterestID, InterestNameCustomer_Interest: (Need suggestion for How to design this)Should Table be design like:Option1: CustomerID, InterestIDOption2: CustomerID, Interest1, Interest2, Interest3, Interest4i.e.Lets Say: Customer table has CustomerA, CustomerB, CustomerCInterest table has Interest I1, I2, I3, I4Lets Say CustomerA Signedup for Interest I1, I2, I3 and CustomerB signed up I1, I4As per Option1:Customer_Interest Table witll haveCustomerA, I1CustomerA, I2CustomerA, I3CustomerB, I1CustomerB, I4ORAs per Option2Customer_Interest (Where Interest Column is bit column..... 1 = Signed up, 0 = Not Signed upCustomerA, 1, 1, 1, 0CustomerB, 1, 0, 0, 1Which way we should design? 3) If we select Option2, and if we are displaying data in ASP.NET Page, will there be any issue if we use 3 tier architecture?Thanks !!!
View 18 Replies View RelatedI am designing an inventory database in which I need some help, I have the following entities:ItemsNotebookWireless CardADSL Modemetc...ModelsAcer centrino 1.6Acer centrino 1.733COM 4x125 hours Wi-fi access50 hours Wi-fi accessetc... PackagesPackage A:Acer centrino 1.63COM 4x125 hours Wi-fi accessPackage B:Acer centrino 1.733COM 4x150 hours Wi-fi accessI made a table for the items having the following fields: Item_ID, Item_Nameand another for the Models having: Model_ID, Model_Name, Item_Type(Foreign Key to Items table)up to this point is this correct?About the packages table, I don't know if it is correct to have a field for each model (one for notebook, other for modem, and other for wireless card) like this it would be like having 3 foreign keys to the same table but nothing distinguishes themI don't know how to relate the packages and the models table.Any recommendations for a proper design for those entities?
View 6 Replies View RelatedI am creating a knowledge base. I want the user to be able to choose a category such as Hardware, Software, Etc. then I want them to be able to choose what type of software such as word, excel, ets.
It will then display in a gridview problems, solutions, submitted by, last updated, and review date.
The gridview will allow users to update solutions and I would also like the ability for technicians to be able to add new Problems/solutions.
What would be the best way to handle this?
Any tips are appreciated.
Rick
I have requirement to create table of 100 columns. Should i create 100 columns in one table or i should create three coulmn table with column id, column desc, column value with 1 row in 100 column table = 100 row in 3 column table. Which will be faster & efficient in performance, io & size.
Thanks
Manoj
The database will provide content management for an Intranet site.
On the site we have a number of articles which are categorised. Each categories can also have sub-categories.
The relationships would seem to be
Category---->Sub-Category----->Article
A category has one or mant sub-categories. A sub-category has one or many articles.
However some categories have articles but are no sub-categories.
Should I create a further relationship between Category and Article to cater for this instance or should their be a dummy category record in this instance?
Hi everbody!!!
i first would like to congratulate this forum for the new member!!! ME ;)
Then i have this question, i´m going to design a database in SQL server and i would like to have some basic hint how to build it up.
It´s a calender for a ASP.Net site i´m building and for the moment it´s just 4 things to have in mind
-users
-dates
-todo´s
-birthdays
If something is unclaer then PLEASE ask me!!
Thanx in advance icaaq
Hi all:
I am designing a sql server database to keep track of patient history and data about various diseases. Is there a book or any kind of resource that I can refer? Any help is appreciated.
Thanks,
ndba
I had a consultant design a database for me and every table contains a GUID. Most tables already contain a field that is unique. Is this necessary? In my view, the queries are no more efficient and it just takes up more space.
Thanks
trying to work on a new project, i need some ideas to setup this design model.
sql 2000 database and asp.
This is call center environment where agent bid on shift (schedules) base on most disireable to least, and it process base on seniority.