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• Help with SQL query (Calculate a ratio between two entitiess)

  - by Mestika

  Hi, I’m going to calculate a ratio between two entities but are having some trouble with the query. The principal is the same to, say a forum, where you say: A user gets points for every new thread. Then, calculate the ratio of points for the number of threads. Example: User A has 300 points. User A has started 6 thread. The point ratio is: 50:6 My schemas look as following: student(studentid, name, class, major) course(courseid, coursename, department) courseoffering(courseid, semester, year, instructor) faculty(name, office, salary) gradereport(studentid, courseid, semester, year, grade) The relations is a following: Faculity(name) = courseoffering(instructor) Student(studentid) = gradereport (studentid) Courseoffering(courseid) = course(courseid) Gradereport(courseid) = courseoffering(courseid) I have this query to select the faculty names there is teaching one or more students: SELECT COUNT(faculty.name) FROM faculty, courseoffering, gradereport, student WHERE faculty.name = courseoffering.instructor AND courseoffering.courseid = gradereport.courseid AND gradereport.studentid = student.studentid My problem is to find the ratio between the faculty members salary in regarding to the number of students they are teaching. Say, a teacher get 10.000 in salary and teaches 5 students, then his ratio should be 1:5. I hope that someone has an answer to my problem and understand what I'm having trouble with. Thanks Mestika

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• List all the months using oracle sql .

  - by Suresh S

  Guys is there any better way to list all the months other than this select to_char(add_months(to_date('01/01/1000', 'DD/MM/RRRR'), ind.l-1), 'MONTH') as month_descr , ind.l as month_ind from dual descr , ( select l from (select level l from dual connect by level <= 12) ) ind order by 2; ANSWER : SELECT to_char(add_months(SYSDATE, (LEVEL-1 )),'MONTH') as months FROM dual CONNECT BY LEVEL <= 12

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• Check constraint over two columns

  - by Rippo

  I want to add a Check Constraint to a table for server 2005 but cannot work it out. MemberId ClubId MeetingId 1 100 10 2 100 10 3 100 10 7 101 10 <-This would throw a check constraint 1 100 11 2 100 11 I do not want to have more than one ClubId for a single MeetingId Basically a ClubId can only belong to a single MeetingId but can have more than one member assigned. How do I achieve this?

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• Microsoft SQL Server 2005 Function, passing list of start and end times

  - by Kevin

  I'd like to do had a dynamic number of one start/end time pairs passed to a function as an input parameter. The function would then use the list instead of just one start, and one end time in a select statement. CREATE FUNCTION [dbo].[GetData] ( @StartTime datetime, @EndTime datetime ) RETURNS int AS BEGIN SELECT @EndTime = CASE WHEN @EndTime > CURRENT_TIMESTAMP THEN CURRENT_TIMESTAMP ELSE @EndTime END DECLARE @TempStates TABLE (StartTime datetime NOT NULL , EndTime datetime NOT NULL , StateIdentity int NOT NULL ) INSERT INTO @TempStates SELECT StartTime , EndTime , StateIdentity FROM State WHERE StartTime <= @EndTime AND EndTime >= @StartTime RETURN 0 END

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• OnTaskFailed event handler in SSIS

  - by Jason M

  If I use OnError event handler in my SSIS package, there are variables System::ErrorCode and System::ErrorDescription from which I can get the error information if any things fails while execution. But I cant the find the same for OnTaskFailed event handler, i.e. How to get the ErrorCode and ErrorDescription from the OnTaskFailed event handler when any things fails while execution in case we want to only implement OnTaskFailed event handler for our package?

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• SQL Structure of DB table with different types of columns

  - by Dmitry Dvornikov

  I have a problem with the optimization of the structure of the database. I'll try to explain it exactly. I create a project, where we can add different values??, but this values must have different types of the columns in the database (eg, int, double , varchar). What is the best way to store the different types of values ??in the database. In the project I'm using Propel 1.6. The point is availability to add value with 'int', 'varchar' and other columns types, to search the table was efficient. In total, I have two ideas. The first is to create a table of "value", which will have columns: "id ", "value_int", "value_double", "value_varchar", etc - with the corresponding column types. Depending on the type of values??, records will be saved with the value in the appropriate column (the rest will be NULL). The second solution is to create separate tables such as "value_int", "value_varchar" etc. There would be columns: "id", "value", which correspond to the relevant types of "value" (ie, such as int, varchar, etc). I must admit that I do not believe any of the above solutions, originally I was thinking about one table "value", where the column would be a "text" type - but this solution would probably be even worse. I would like to know your opinion on this topic, maybe something else would be better. Thanks in advance. EDIT: For example : We have three tables: USER: [table of users] * id * name FIELD: [table of profile fields - where the column 'type' is the type of field, eg int or varchar) * id * type * name VALUE : * id * User_id - ( FK user.id ) * Field_id - ( FK field.id ) * value So we have in each row an user in USER table, and the profile is stored in the VALUE table. Bit each profile field may have a different type (column 'type' in the FIELD table), and based on that I would want this value to add to the appropriate column of the appropriate type.

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• Is it possible to write a database view that encompasses one-to-many relationships?

  - by Brandon Linton

  So I'm not necessarily saying this is even a good idea if it were possible, since the schema of the view would be extremely volatile, but is there any way to represent a has-many relationship in a single view? For example, let's say I have a customer that can have any number of addresses in the database. Is there any way to list out each column of each address with perhaps a number as a part of the alias (e.g., columns like Customer Id, Name, Address_Street_1, Address_Street_2, etc)? Thanks!

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• Datatype Conversion

  - by user87

  I am trying to execute the following Query select distinct pincode as Pincode,CAST(Date_val as DATE) as Date, SUM(cast(megh_38 as int)) as 'Postage Realized in Cash', SUM(cast(megh_39 as int)) as 'MO Commission', from dbo.arrow_dtp_upg group by pincode,Date_Val but I am getting an error "Conversion failed when converting the nvarchar value '82.25' to data type int." Am I using a wrong data type?

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• heirarchial data from self referencing table in tree form

  - by Beta033

  Ii looks like this has been asked and answered in all the simple cases, excluding the one that i'm having trouble with. I've tried using a recursive CTE to generate this, however maybe a cursor would be better? or maybe a set of recursive functions will do the trick? Can this be done in a cte? consider the following table PrimaryKey ParentKey 1 NULL 2 1 3 6 4 7 5 2 6 1 7 NULL should yield PK 1 -2 --5 -6 --3 7 -4 where the number of - marks equal the depth, my primary difficulty is the ordering.

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• search between date's and time's in sql server 2008

  - by Gold

  hi i need to search between date's and time's. for example: between date: 30/02/2007 time: 10:32 and date: 21/06/2008 time: 14:19 what is the most simple query for this ? thank's in advance

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• Calculate the SUM of the Column which has Time DataType:

  - by thevan

  I want to calculate the Sum of the Field which has Time DataType. My Table is Below: TableA: TotalTime ------------- 12:18:00 12:18:00 Here I want to sum the two time fields. I tried the below Query SELECT CAST( DATEADD(MS, SUM(DATEDIFF(MS, '00:00:00.000', CONVERT(TIME, TotalTime))), '00:00:00.000' ) AS TOTALTIME) FROM [TableA] But it gives the Output as TOTALTIME ----------------- 00:36:00.0000000 But My Desired Output would be like below: TOTALTIME ----------------- 24:36:00 How to get this Output?

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• Comparing Page.User.Identity.Name to value in sql Table

  - by Peggy Fusselman

  First, I am SO sorry if the answer is out there. I've looked and looked and feel this is such a simple thing that it should be obvious. I'm wanting to make sure only the person who added an event can modify it. Simple! I already have a datasource that has event_added_by as a data point. It is populating a FormView. SelectCommand="SELECT * FROM [tbl_events] WHERE ([event_ID] = @event_ID)" And I have Page.User.Identity.Name. How do I compare the two? I can't pull the value from the label in the FormView so I need to find another way. if (!IsPostBack) { string uname = Page.User.Identity.Name; string owner = ""// this is where I need to grab the value from dsEvents; if (uname != owner) { //Send them somewhere saying they're not allowed to be here } } TIA for any help!

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• shreding xml column

  - by csetzkorn

  Hi, I have a XML column which contains XML like this: <Set> <Element> <ID> 1 </ID> <List> <ListElement> <Part1> ListElement 1 </Part1> </ListElement> <ListElement> <Part1> ListElement2 </Part1> </ListElement> </List> </Element> <Element> <ID> 2 </ID> <List> <ListElement> <Part1> ListElement3 </Part1> </ListElement> <ListElement> <Part1> ListElement4 </Part1> </ListElement> </List> </Element> </Set> I would like to shred this into a relation table containing this: ID, ListElement 1, ListElement1 1, ListElement2 2, ListElement3 2, ListElement4 I am able to obtain the content of the Parts using something like this: select List.value('(Part1/text())[1]', 'varchar(max)') as test from Table CROSS APPLY xml.nodes('// Element/List/ListElement') AS List(List) but I have not yet achieved to keep the ‘foreign key’ (the ID value). Thanks. Best wishes, Christian

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• i need to use string variable in the Proc in sql server database 2005

  - by bassam

  I have this procedure CREATE Proc [dbo].Salse_Ditail -- Add the parameters for the stored procedure here @Report_Form varchar(1) , @DateFrom datetime , @DateTo datetime , @COMPANYID varchar(3), @All varchar(1) , @All1 varchar(1) , @All2 varchar(1) , @All3 varchar(1) , @All4 varchar(1) , @All5 varchar(1) , @Sector varchar(10), @Report_Parameter nvarchar(max) as BEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. DECLARE @STRWhere nvarchar(max) IF @All5=0 AND @All4=0 AND @All3=0 AND @All2=0 AND @All1=0 and @All=1 set @STRWhere= N'and Sector_id = @Sector' if @Report_Form =1 or @Report_Form =3 or @Report_Form =4 SELECT RETURNREASONCODEID, SITE,SITE_NAME,Factory_id,Factory_Name,Sector_id,sector_name,Customer_name, Customer_id,ITEMID,ITEMNAME,SALESMANID,SALESMAN_NAME,Net_Qty,Net_Salse,Gross_Sales,Gross_Qty, NETWEIGHT_Gross,NETWEIGHT_salse_Gross,NETWEIGHT_NET,NETWEIGHT_salse_NET,Return_Sales,Free_Good, CollectionAmount FROM hal_bas_new_rep WHERE DATAAREAID =@COMPANYID AND INVOICEDATE >= @DateFrom AND INVOICEDATE <= @DateTo and Report_Activti = @Report_Form if @Report_Form =2 SELECT RETURNREASONCODEID , RETURNREASONDESC, SITE , SITE_NAME , Factory_id , Factory_Name , Sector_id , sector_name , Customer_name , Customer_id , ITEMID , ITEMNAME , SALESMANID , SALESMAN_NAME , Return_Sales FROM dbo.hal_bas_new_rep WHERE DATAAREAID =@COMPANYID AND INVOICEDATE >= @DateFrom AND INVOICEDATE <= @DateTo and Report_Activti = @Report_Form and RETURNREASONCODEID in ( SELECT Val FROM dbo.fn_String_To_Table(@Report_Parameter,',',1) ) /* @STRWhere // question: how can I use the variable here? */ end GO As you see I'm constructing a condition for the WHERE clause in a variable, but I don't know how to use it.

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• SQL query: Last but one rank for user

  - by Derk

  My table structure looks like this: create table rankings ( id IDENTITY NOT NULL, user_id INT NOT NULL, game_poule_id INT NOT NULL, rank INT NOT NULL, insertDate DATETIME NOT NULL, FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE, FOREIGN KEY (game_poule_id) REFERENCES game_poules(id) ON DELETE CASCADE ); All old rankings of users per game are saved in this table. Now I want to have the last but one rank in the table for all users in a gamepoule. Has someone an idea how to achive this? Thanks

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• Multi table Triggers ms sql noob

  - by Chin

  I have a load of tables all with the same 2 datetime columns (lastModDate, dateAdded). I am wondering if I can set up global Insert Update trigger for these tables to set the datetime values. Or if not, what approaches are there? Any pointers much appreciated

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• SQL for sorting boolean column as true, null, false

  - by petehern

  My table has three boolean fields: f1, f2, f3. If I do SELECT * FROM table ORDER BY f1, f2, f3 the records will be sorted by these fields in the order false, true, null. I wish to order them with null in between true and false: the correct order should be true, null, false. I am using PostgreSQL.

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• Merge Primary Keys - Cascade Update

  - by Chris Jackson

  Is there a way to merge two primary keys into one and then cascade update all affected relationships? Here's the scenario: Customers (idCustomer int PK, Company varchar(50), etc) CustomerContacts (idCustomerContact int PK, idCustomer int FK, Name varchar(50), etc) CustomerNotes (idCustomerNote int PK, idCustomer int FK, Note Text, etc) Sometimes customers need to be merged into one. For example, you have a customer with the id of 1 and another with the id of 2. You want to merge both, so that everything that was 2 is now 1. I know I could write a script that updates all affected tables one by one, but I'd like to make it more future proof by using the cascade rules, so I don't have to update the script every time there is a new relationship added. Any ideas?

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• SQL Query Question ROW_CONCAT

  - by DaveC

  Hello Guy, I have been stuck on this problem for quite awhile... I hope someone out there can give me a hand. The following table is in my database: Product_ID Color Type 1 Red Leather 1 Silver Metal 1 Blue Leather 2 Orange Metal 2 Purple Metal I am trying to get the following output: Product_ID Type Color 1 Leather Red, Blue 1 Metal Silver 2 Metal Orange, Purple I know it has to do with some kind of double group by and a group_concat.... have been looking at this for an hour without figuring it out. Any help is much appreciated!!!

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• does it makes sense to do SP for simple queries like select * from users

  - by Omu

  is it going to be faster if instead of doing select * from users where id = 1 or delete from users where id = 1 or select count(*) from users I would create a SP for it ?

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• SQL Server 2005 Computed Column Is Persisted

  - by hilary

  I have some computed columns in a table and need to know if I should set Is Persisted to true. What are the advantages? Are there any disadvantages? What does 'Is Persisted' mean?

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• Nesting queries in SQL

  - by ZAX

  The goal of my query is to return the country name and its head of state if it's headofstate has a name starting with A, and the capital of the country has greater than 100,000 people utilizing a nested query. Here is my query: SELECT country.name as country, (SELECT country.headofstate from country where country.headofstate like 'A%') from country, city where city.population > 100000; I've tried reversing it, placing it in the where clause etc. I don't get nested queries. I'm just getting errors back, like subquery returns more than one row and such. If someone could help me out with how to order it, and explain why it needs to be a certain way, that'd be great.

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• import data from another table with same id

  - by Luca Romagnoli

  Hi, i have 2 table User (id, name, surname,cod) UserNew (uid, uname, usurname, ucod) The first table has data the second no. I have to copy the data of the User table in the UserNew table. I've tried with a insert query but uid (primary key) value changes. How can i do to mantaince the same values? thanks

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• Application self aware of external database record modifications.

  - by Khou

  How do you make your application aware that a database record was changed or created by an external application rather than the application itself? Do you add a special check sum to the database record or what do you do to stop external changes to the database? (in case it was hacked and the hacker decides to add a new record or change an existing database record)

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• SQL Server Reporting Services Bar Chart

  - by Avitus

  I am trying to create horizontal bar chart to look like a pill chart. I would like to take a either a stacked bar chart or a 100% stacked bar chart and put rounded ends onto this chart. I would only be using 1 row within the chart. One idea I had was just putting rounded images on either end of the chart to accomplish this but I'm not sure that this will give the smooth feel of a single pill. Does anyone have a good suggestion? I am not tied to the idea of using a chart object. But I would prefer to stay away from third party components that need to be purchased.

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