greatest-n-per-group

I want to be able to return 5 menuitem per menu. I've tried this several script but had no luck. here are the tables menus ------- menuid int() profileName varchar(35) menuitems ----------- itemid int() name varchar(40) Here what I have now. I'm getting the error message with the script below. Error: Subquery returns more then 1 row. SELECT m.profilename, name FROM menus m WHERE (SELECT name from menuitems s where m.menuid = s.menuid limit 5) Any suggestion is great appreciated. You have to use side effecting variables for this SELECT profilename, name FROM ( SELECT m.profilename, s.name, @r:

I'm hoping there's a simple way to do this without using a sub-query: Scenario: You have "TableA" with columns "Key", "SubKey", and "Value". I need to get the "Value" of the MAX("SubKey") for a given "Key". So if the Table contained the rows: KEY SUBKEY VALUE 1 1 100 1 2 200 1 3 300 For Key = 1, I need the value 300. I was hoping to do something like this: SELECT VALUE FROM TableA WHERE Key = 1 HAVING SubKey = MAX(SubKey) But that's a no-go. Is there a way to do this without doing a 'WHERE SubKey = (subselect for max subkey)'? Using a self join: This will return all the values with subkey

How can you select the top n max values from a table? For a table like this: column1 column2 1 foo 2 foo 3 foo 4 foo 5 bar 6 bar 7 bar 8 bar For n=2, the result needs to be: 3 4 7 8 The approach below selects only the max value for each group. SELECT max(column1) FROM table GROUP BY column2 Returns: 4 8 For n=2 you could SELECT max(column1) m FROM table t GROUP BY column2 UNION SELECT max(column1) m FROM table t WHERE column1 NOT IN (SELECT max(column1) WHERE column2 = t.column2) for any n you could use approaches described here to simulate rank over partition. EDIT: Actually this article will

I am facing a rather interesting problem. I have a table with the following structure: CREATE TABLE [dbo].[Event] ( Id int IDENTITY(1,1) NOT NULL, ApplicationId nvarchar(32) NOT NULL, Name nvarchar(128) NOT NULL, Description nvarchar(256) NULL, Date nvarchar(16) NOT NULL, Time nvarchar(16) NOT NULL, EventType nvarchar(16) NOT NULL, CONSTRAINT Event_PK PRIMARY KEY CLUSTERED ( Id ) WITH ( PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON ) ) So the issue is that I have to display this data in a grid. There are two requirements. The

Possible Duplicate: Retrieving the last record in each group I have one table, which has three fields and data. Name , Top , Total cat , 1 , 10 dog , 2 , 7 cat , 3 , 20 horse , 4 , 4 cat , 5 , 10 dog , 6 , 9 I want to select the record which has highest value of Total for each Name , so my result should be like this: Name , Top , Total cat , 3 , 20 horse , 4 , 4 Dog , 6 , 9 I tried group by name order by total, but it give top most record of group by result. Can anyone guide me, please? select Name, Top, Total from sometable where Total = (select max(Total) from sometable i where i.Name =