I need to get the 5 most common occurences from a table. Not really sure of the SQL statement I would use to do that. Would someone be kind enough to throw out a select statement that would do this? psuedo code would be fine, I just need to know the jest of how to do it. I originally thought Select Top 5 would work, but then I actually started thinking and realized it wasnt it. So now im stuck. Any help would be appreciated.
Thanks,
Steve
EDIT: I should add that this will be coming from a view with multiple tables..thanks
I'm having trouble getting my head around this, and no one in the groupshas posted exactly the problem.The table below tracks site traffic across a network. There is 1 rowper pageview and UUID is that user's unique cookie.CREATE TABLE [dbo].[Stats_Working] ([inac_stats_id] [int] NOT NULL ,[hit_time] [datetime] NULL ,[site_id] [int] NULL ,[site_cat_id] [int] NULL ,[item_id] [int] NULL ,[local_content_cat_id] [int] NULL ,[UUID] [float] NULL ,[USER_AGENT] [char] (50) NULL) ON [PRIMARY]GOA client asked: of these pageviews and within each category, how manyare accounted for by users that generated 2 or fewer pageviews, 3+pageviews, and 4+ pageviews?I said, "yes, we have that information". I know it's here, but I'mbraindead from looking at what should be a simple solution.Thanks for any helpCam Bevis*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
For the above string, which string function can be used to find the number of occurences of a particular character, for example, ','? For this example, the answer should be 4. Is there any built-in function in SQL to do this?
I'm building an exception management system into my application. What are the most common errors when working with a DAL and a SQL server. The biggest problem can be Database connection. My questions: * Are all SQL related errors catched by the SqlExeption class? * Which are the most common sql errors?
I have a stored procedure I use to fill my datagrid..... While doing this is there a way to get the number of records returned... I use a datareader........any help
I just inherited a Java application with a fairly complex data modelthat does not yet have any indexes except those on primary keys. It isstill in development and before I get to do any performance testing Iwant to put some default indexes on it. I realize that this a veryvague request but it's better than nothing so I want to start withthose that are generally a good idea and then tune those areas thatrequire more fine grained approach. By the way, I'm mostly a Javaprogrammer so please forgive my DB ignorance and I thank you for anyhelp.Since the full schema is quite large I will use a simple example (fullycited below my questions). Here is list of indexes that I think wouldbe a good idea. If anyone can add to it or comment on my questions Iwould appreciate it.1. Index on primary keys in all three tables. My understanding thatthis indexing happens automatically just by declaring that a column isa PK.ALTER TABLE employees ADD PRIMARY KEY (emp_id);ALTER TABLE employee_addresses ADD PRIMARY KEY (address_id);ALTER TABLE departments ADD PRIMARY KEY (dept_id);Question: Does index get created automatically because this is a PK?2. Index on foreign keys in the children tables to prevent deadlocksand lock escalations.CREATE INDEX fk_index ON employee_addresses (emp_id)3. Indexes on common queries on all three tables.CREATE INDEX common_query_idx on employees(last_name, first_name,position)CREATE INDEX common_query_idx on departments(last_name, first_name,position)CREATE INDEX common_query_idx on employee_addresses(street, city)Question: Given that the searches can be on any field separately andin any combination should I also put an index on each columnindividually or will the composite index take care of individualsearches as well? For example, will the above indexes be sufficientfor the following SELECT:SELECT e.last_name, e.first_name from employees e, departments d,employee_addresses ea, dept_employees de WHERE e.emp_id = de.emp_id ANDd.dept_id = de.dept_id AND ea.emp_id = e.emp_id AND e.position ='master chief' AND d.dept_name = 'galactic affairs' AND ea.city='LosAngeles'4. Unique index on the association table. Again this is accomplishedusing PKALTER TABLE dept_employees ADD PRIMARY KEY (dept_id, emp_id)Question: Is the index on (dept_id, emp_id) automatic because of PK?5. The association table has to go both ways and PK takes care only ofthe first half. Thus add an index to go the other way.create unique index dept_employee_idx on dept_employee(emp_id,dept_id)Question: should I use INDEX ORGANIZED TABLE?Question: should I have UNIQUE qualifier on the second index given thatPK already takes care of it?Thanks,Robert===== EXAMPLE ======1) An employee can be in many departments and a department can containmany employees.2) Common searches for employees are on last_name, first_name,position, department_name, department_location separately and in anycombination.3) There are common searches for departments that contain certainemployees e.g. find all departments containing John Smith.CREATE TABLE employees(emp_id INTEGER NOT NULL,last_name VARCHAR(50) NOT NULL,first_name VARCHAR(25) NOT NULL,position VARCHAR(10) NOT NULL);CREATE TABLE employee_addresses(address_id INTEGER NOT NULL,emp_id INTEGER NOT NULL,street VARCHAR(50) NOT NULL,city VARCHAR(25) NOT NULL,);CREATE TABLE departments(dept_id INTEGER NOT NULL,dept_name VARCHAR(50) NOT NULL,dept_location VARCHAR(25) NOT NULL,);CREATE TABLE dept_employees(dept_id INTEGER NOT NULL,emp_id INTEGER NOT NULL,);ALTER TABLE employee_addresses ADD FOREIGN KEY (emp_id) REFERENCESemployees(emp_id)ALTER TABLE dept_employees ADD FOREIGN KEY (emp_id) REFERENCESemployees(emp_id)ALTER TABLE dept_employees ADD FOREIGN KEY (dept_id) REFERENCESdepartments(dept_id)
I was studying Common Table expression in Sql server 2005. I have written the code Declare @PictureArray as varchar(200) Set @PictureArray = ''; with UserProfile_CTE(UserPicture) As( select @PictureArray = @PictureArray + '~' + PictureName from UserPicture where UserProfileID = 1102 select @PictureArray ) select * from UserProfile_CTE
But I am getting the error Incorrect syntax near '=' I am getting the error in the lineselect @PictureArray = @PictureArray + '~' + PictureName from UserPicture where UserProfileID = 1102 But I don't know the reason for this, Kindly advice Regards Karan
In my experience of going through plenty of interviews, I have came across a question that I am reminded of by someone's signature.
The common question in this instance is: What is the advantage of a cursor over a stored procedure? Vice Versa?
I could only, in my so few experiences, have answered that stored procedure consumes less system resources than a cursor. The advantage a cursor has is record by record examination and looping capabilities.
Needless to say that whenever asked those questions, I haven't landed the position. So I'm wondering, what is the more appropriate answer?
Basically I want to select all of the Products (no duplicates) where EVERY customer(1, 2 & 3) have bought a from a common shop type: i.e 'Trainers' and 'Football' should not be selected as Customer3 has not bought any goods from a sports store.
This is an example of a larger problem where there can be numerous products, customers and shops. Here's a DESCRIBE of the relevent columns in each of the tables:
CUSTOMER: customerID
PRODUCT: productID customerID shopID
SHOP: shopID
This looks like it should be easy but my SQL isn't the best ;-)
I try to find the best design for a SQL Server 2005 database structure.
I have the following 'objects':
Facilities Departments - 'dependents' of a Facility Users
Addresses - each of the above can have none or more Addresses.
The basic tables design would be: CREATE TABLE [dbo].[Facility]( [cFacilityID] [nvarchar](5) NOT NULL PRIMARY KEY CLUSTERED , [cFacilityName] [nvarchar](50) NOT NULL ) GO CREATE TABLE [dbo].[Department]( [cFacilityID] [nvarchar](5) NOT NULL FOREIGN KEY REFERENCES [dbo].[Facility] ([cFacilityID]) ON UPDATE CASCADE ON DELETE CASCADE, [cDepartmentID] [nvarchar](3) NOT NULL, [cDepartmentName] [nvarchar](50) NOT NULL, PRIMARY KEY CLUSTERED ( [cFacilityID], [cDepartmentID]) ) GO CREATE TABLE [dbo].[User]( [cUserID] [nvarchar](5) NOT NULL PRIMARY KEY CLUSTERED, [cUserName] [nvarchar](50) NOT NULL ) GO CREATE TABLE [dbo].[Addresses]( [pkAddress] [int] IDENTITY(1,1) NOT NULL PRIMARY KEY CLUSTERED, [cAddress] [nvarchar](255) NULL, [cZip] [nvarchar](5) NULL, [cEmail] [nvarchar](255) NULL ) GO
The question regards the Addresses table: How can I design the Addresses table(s) so I can enforce relational integrity and cascade update and delete for each Facility, Department and User tables?
I figured out the following options, but none achives my requirements:
1. An Address table for each 'object': FacilityAddress, DepartmentAddress, UserAddress with the corresponding foreign key in each Address table. This solution duplicates all the addresses fields (which are more than I showed in the example).
2. A common Addresses table with a discriminator field (1=Facility, 2=Department, 3=User). This doesn't allow me to enforce referential integrity with constraint, maybe only with triggers.
3. A common Addresses table with a foreign key for each 'object (fkFacility, fkDepartment, fkUser) allowing nulls. In this case, the 'dependence' between Facility and Department stops me to enforce cascade deletes/updates on both Facility and Department foreign key (circular...).
4. An intermediate (link) table between each 'object' and Addresses table with the foreign keys (Facility, Addresses). Again, no referential integrity.
So, is there a method to design such structure?
PS. Please keep in mind that this is just a simplified example (reduced at the key information) of my real structure.
At the risk of asking a stupid question -Is anyone familiar with either a query against the systables or maybean outside tool that will provide a list of the most common joins thathave been made in user created views? I'm not talking about tablerelationships that are established at the database level, but rather,I'm referring to the ability to find which joins have been utilized inpoorly constructed databases where no relationships were establishedin the first place.Thanks in advance -Cindy T.
What is the SQL Server equivalent of DB2 common table expressions? Forexample,with gry(year,count) as(select floor(sem/10),count(distinct ssn)from gradesgroup by floor(sem/10))select year,sum(count) Head_Count from grygroup by yearhaving year >= 1980;N. ShamsundarUniversity of Houston
I see that part of SP2 is the new CC certification -- can anyone give me some more details. What level is it at? EAL4? I can't seem to find the certificate on the CC Web site but it could be because it's not SP2 yet.
I'm working on an application designed like this: There's a table "DailyTransations" (DT) containing daily transactions... Then there's an archive table "TransationsArchive" (TA) with the exact same structure.
When a record is inserted in DT, it is also in TA (via a trigger) and the reporting is done against TA. Now for performance issues, we delete from DT the records older than 2 days since they are not needed for processing.
First, what do you think of that implementation?
We thought about using partitions based on the transaction date and completely eliminate TA, but it seems once a record is assigned to a partition, it is not moved automatically...
The comapny i work for has a server running the following.
Opteron 246x2
2 Gig memory
320 Gig Sata 2 drives
Windows 2003 Standard Edition
SQL Server 2005 Express Edition. The Free one.
There are approx 10 users that connect to the server.
There are two programs which seem to use sql server. Act 7.0 and service ceo.
When the computer is rebooted its at 0% for sqlserver.exe
Than when all connect it maxes it 50% and its steady there. Seems Service ceo affects it the most.
Told by comapny need to buy full blown sql server to resolve problem. But i dont think this is the problem.
Questions: Is it common for server to be at 50% all the time with sql server running?
And if its not is there a way to reduce the sql cpu usage.
I am new to sql server and have done alot of research and fixes. Ive unsitalled and reinstalled all sql instances and done the tweaks suggested. Any fresh ideas would be great thanks.
I need to display the company logo on 100 odd reports that run from different folders on the report manager. Since the company logo has changed before and we had to change every report, I want the image stored on a server (with SSL on) and want the reports to point to the server. The server is going to be different in development and production environments.
When I try to add the image using "Image Wizard" I get the error "Invalid image.". The wizard wouldn't let me use a function to build the path based on the environment and select the image from the correct server. It doesn't accept anything that doesn't start with "http:" when I select "web" as the image source.
I know its not a good idea to give you a big query...but/...
I have a query (given below) with Common table expressions. It is giving me error : The multi-part identifier "dbo.tmpValidServices_ALL.Service" could not be bound. for all the fields .. Do you have any idea.. I fed up with analysing query.. made me mad.. please help me...
SET @sql = 'WITH Q1 (SiteID,Programme,Complete,PID,COC,NotionalSum,TVMinsSUM,Postcode,Suburb,Qty) AS
(SELECT dbo.tmpValidServices_ALL.SiteID, dbo.tmpValidServices_ALL.Programme, dbo.tmpValidServices_ALL.Complete AS Complete, dbo.tmpValidServices_ALL.RID AS PID, dbo.tmpValidServices_ALL.COC# AS COC, (dbo.lkpService.Notional$) AS NotionalSum, (TVMins) AS TVMinsSUM, dbo.tmpDemographics_ALL.Postcode, dbo.tmpdemographics_ALL.Suburb, count(*) as Qty
FROM lkpService
INNER JOIN dbo.tmpValidServices_ALL vs ON dbo.lkpservice.code = dbo.tmpValidServices_ALL.Service INNER JOIN dbo.tmpDemographics_ALL ON dbo.tmpValidServices_ALL.RID = dbo.tmpDemographics_ALL.RID '
IF @COCGroup IS NOT NULL SELECT @sql = @sql + 'LEFT OUTER JOIN dbo.lkpCOC c ON dbo.tmpValidServices_ALL.COC = c.pvcode '
SELECT @sql = @sql + 'LEFT OUTER JOIN dbo.lkpAgency ag ON vs.SiteID = ag.EXACT# '
SELECT COUNT(DISTINCT PID + CAST(Complete AS varchar(20)) + CAST(COC AS varchar(20)) + CAST(SiteID AS varchar(20)) + CAST(Programme AS varchar(20))) AS Visits, COUNT(DISTINCT PID + CAST(SiteID AS varchar(20)) + CAST(Programme AS varchar(20))) AS Patients, COUNT(DISTINCT CAST(COC AS varchar(20)) + CAST(SiteID AS varchar(20)) + CAST(Programme AS varchar(20)) + CAST(PID AS varchar(20))) AS COCs, SUM(NotionalSum) AS NotionalSum, SUM(TVMinsSUM) AS TVMinsSUM,Postcode,Suburb,sum(Qty) as Qty
FROM Q1
Group by Postcode,Suburb
Order by Postcode,Suburb '
SET @paramlist = '@SiteID as numeric, @COCGroup as varchar(20), @Postcode as varchar(20), @StartDate DateTime, @EndDate DateTime, @Schedule varchar(20), @Provider varchar(20)'
EntityID AnotherColZ AnotherColY AnotherColX 1 a f g 1 f g s 2 t w a 3 j r s 3 l e a
required output ------------------------------------------------------------------------------------- Entity1 (group the data at this level) ColValA ColValB (table for values from dataset 1) 56 78 16 75
AnotherColZ AnotherColY AnotherColx (table for values from dataset 2) a f g f g s ------------------------------------------------------------------------------------ Entity2 (now we move on to the next entity) ColValA ColValB (again one table for values from dataset 1) 12 14
(and another for values from dataset 2) ----------------------------------------------------------------------------------- etc
I have a few stored procs that I use from more than one database. There has to be a place I can put these so I don't have a copy of the proc in each DB, right?
Where do you put them and how do you reference them? Thanks.
I have managed to write my first CTE SQL that handles recursion but I have a problem with distinct - can't get that to work!! My CTE:WITH StudentsHierarchy(SystemID1, GroupID, AccessType, AccessGroupID, StudentID, HierarchyLevel) AS ( --Base Case SELECT SystemID, GroupID, AccessType, AccessGroupID, StudentID, 1 as HierarchyLevel FROM UserGroup a
UNION ALL
--Recursive step SELECT u.SystemID, u.GroupID, u.AccessType, u.AccessGroupID, u.StudentID, uh.HierarchyLevel + 1 as HierarchyLevel FROM UserGroup u INNER JOIN StudentsHierarchy uh ON u.GroupID = uh.AccessGroupID
) Select sh.SystemID1, sh.GroupID, sh.AccessType, sh.AccessGroupID, sh.StudentID, sh.HierarchyLevel, (select StudentName from Student s where sh.StudentID = s.StudentID) AS StudentName from StudentsHierarchy sh WHERE AccessType = 'S'
and I would like to have a distinct on the StudentID like:Select DISTINCT sh.StudentID, sh.SystemID1, sh.GroupID, sh.AccessType, sh.AccessGroupID, sh.StudentID, sh.HierarchyLevel, (select StudentName from Student s where sh.StudentID = s.StudentID) AS StudentName from StudentsHierarchy sh WHERE AccessType = 'S'
I have two tables that contain product SKUs (12-character strings): Table 1Product IdSKU... Table 2ProductVariantIdSKU... I need to find the MAX (i.e., last used) SKU that exists in either table. I did write two sps, one for each table that I can compare in code and use the larger (latest) one but I am not that facile with JOINS, etc., so I can't figure how how to create a single sp to return the value I am looking for--although I assume this must not only be possible but trivial to more experienced SQLers. Thanks! Duncan
I have 3 jobs each consists of set of stored procedures.The stored procedures have lots of temp tables. And all the jobs run at the same time.
job1:
EXEc sp1 EXEC sp2 EXEC sp3
Job2
EXEC abc1 EXEC abc2 EXEC abc3 EXEC abc4 EXEC abc5
Job3
EXEC xyz1 EXEC xyz2 EXEC xyz3 EXEC xyz4
But the issue is that the stored procedures in the job1 has temp tables with the same name as stored procedures in the job 2 have.
Eg:
procedure abc1 and procedure sp2 have the temp table #temp1. procedure abc4 and procedure xyz2 have the temp table #temp3.
Like this i have some more common temp tables. So my question is that can I use the temp tables like that.If so does it degrade the perforamnce of the sps.
On the above view example, if table PARSEL has 1 million records do I have to create an index for PARSELDURUM or when I create a view does SQL server create automatic virtual index?
I want to run multiple DTS packages which export data into text files. There is only one Data Source ..and multiple destinations. When i write a code for this in VB ,for each Package i need to define the source connectioninividually. Can't i use the same Source connection which i used for the first package in the subsequent packages?
