1. [Relshp].[PersonId] to primary key [Person].[PersonId], and
2. [Relshp].[RelatedToPersonId] to primary key [Person].[PersonId].
What kind of index structure would best support those FK constraints?
Would it be:
a) One combined index:
CREATE INDEX IX_Relshp ON Relshp (PersonId, RelatedToPersonId)
or
b) Two indexes:
CREATE INDEX IX_RelshpP ON Relshp (PersonId)
CREATE INDEX IX_RelshpR ON Relshp (RelatedToPersonId)
or
c) Two "mirrored" combined indexes:
CREATE INDEX IX_RelshpP ON Relshp (PersonId, RelatedToPersonId)
CREATE INDEX IX_RelshpR ON Relshp (RelatedToPersonId, PersonId)
I run into a problem when asking to show a query of employee vacation days.
table 1: column1 Â is dates e.g. 2015-01-01 2015-01-02 2015-01-03Â . . . 2015-12-31
table2: employeeID vacation_date Tom 2015-01-03 Tom 2015-01-04 David 2015-01-04 John 2015-01-08 Mary 2015-01-012
My query output need to be:
2015-01-01 2015-01-02 2015-1-03 Tom 2015-01-04 Tom 2015-01-04 David 2015-01-05 2015-01-06 2015-01-07 2015-01-08 John 2015-01-09 2015-01-10 2015-01-11 2015-11-12 Mary
... etc... all the way to 2015-12-31
when i use left outer join, i only record one employee per date.
I've created a new table and added data to it. Now I want to index a given column. Will simply creating and saving the index index the column or do I need to do something else to create the actual index?
I want to know is a flat file faster than a RDBMS for indexing for example a search engine indexing would a flat file be better in terms of performance, scalability etc than a RDBMS?
OK, I imported 680 million records into an unindexed table. That went well.
Then, I went into Enterprise Manager and added a two column non-unique clustered index to that table to speed access.
It's been running for ~36 hours and I have no idea when it will complete. I have deadlines that I'm going to miss and am very nervous; what can I do?
SQL Server 2000 Enterprise Edition (8.00.818 - sp3 + hotfixes) Dual 3Ghz Xeon (two physical CPUs each have HyperThreading enabled) Windows 2000 SP4 4GB RAM (although I just noticed the 3GB OS switch wasn't on) SCSI boot drive tempdb, data, and transaction log are on a FibreChannel RAID SAN
I have currently one SQL FT catalog which indices couple of tables in on our server on nightly basis. It does a 'full' indexing of data as originally designed. Now the time it is taking to index all the data is unacceptable to user. I am working on it to make it index 'incrementally'.
But, for a short-term approach I want to find out, can we FT index a 'table A' in two catalogs on same SQL Server?
I am looking for an alternate logic for below-mentioned code where I am inserting into a table and having left join with the same table
insert TABLE1([ID],[Key],[Return]) select distinct a.[ID],cat1,cat2Â from (select ID,[Key] Cat1 ,[Return] cat2 from @temp as temp) a left join TABLE1 oon a.ID= o.ID and a.Cat1 = o.[Key] and a.cat2 = o.[return] where [key] is null order by ID
I am using sql server express edition and when i try to apply full text indexing on the table - the setting is set to "NO" and i am unable to set it to Yes please advise - thanks Jeff
i have a directory database with approx. 80 million records. i am feeding the database with bulk_insert. Indexing one of the fields took about 8 hrs. After indexing when i run queries with the indexed field the response time is under 1 sec. However if i run select queries with like on non-indexed fields it takes more than 2 mins. So i decided to index 4 other fields in the database and it looks like the indexing process is going to run for 2 days. i am a novice in SQL database design and i am not sure if this is the best way to index the table. i am just using create index. Any suggestions / advice welcome.
I am using a multi-statement table-valued function to assemble data from several tables and views for a report. To do this, I INSERT data into the first few columns and then use UPDATEs to put data additional data into each row. Each UPDATE uses a WHERE criteria that identifies a unique row, based on the value of the first few columns.
The problem I'm having is that the UPDATEs are taking forever to execute. I believe the reason is that the temporary table that's created for the function is not indexed, so each row update requires a complete search of several columns.
In other situations I've been able to define one column as a primary key for the temporary table, but in this situation the primary key would have to consist of four columns, which doesn't seem to be allowed in the table definition for the function.
Is there any way to create indexes for the temporary tables that are created for multistatement table-valued functions? I think that would improve the UPDATE performance dramatically.
I have tables Companies, CompaniesDetails (the company branches), Addresses and Companies_Addresses.
The addresses table contain street and city while the Companies_Addresses has the keys for both companies and branches ,i.e., they are linked to Companies and CompaniesDetails via CompanyID and CompanyDetailID and to Addresses via addressID.
Companies_Addresses id (PK) companyID (FK) companyDetailID (FK) addressID (FK)
I am able to get the branch address at the moment with this code but I would like to get the company address as well using a single select statement.
Code: SELECT DISTINCTAddresses.city as branchCity, Addresses.street as branchStreet FROMCompanies LEFT JOINCompaniesDetails AS cd ON companies.companyID = cd.companyID
LEFT JOINCompanies_Addresses AS c ON c.companyDetailID = cd.companyDetailID LEFT JOINAddresses ON c.addressID = Addresses.addressID
WHERE Companies.name LIKE 'abc' ANDCompanies.status_indicator like 'Current'
If a table gets joind with itself and then joined again with itself, is it possible to perform one kind of outer join from the third table to the second tabe and having the range of records in the second table limited to the joins between the first and the second table?
Join on RegionID Join on RegionID and City Show records not qualifying for the joint but limited to the scope of of records established by the first joint _______________ ________________ _______________ | | | | | | | RegionID One | | RegionID One | | RegionID One | |_______________| | City New York | | City New York| |________________| |_______________| _______________ ________________ _______________ | | | | | | | RegionID One | | RegionID One | | RegionID One | |_______________| | City New York | | City New York | |________________| |_______________| _______________ ________________ _______________ | | | | | | | RegionID One | | RegionID One | | RegionID One | |_______________| | City Buffalo | | City New York | |________________| |_______________|
This is regarding the joins...for instance I have three Tables A, B, C. And they are related to each other. If I am joining A->B,B->C then is it necessary to join A->C too? what happens if I omit join A->C? and what happens if I include join A->C too?
Hello allLet's say I have 1 table "contract" containing the following data:id year sales45 2005 10045 2004 9589 2005 25089 2004 27512 2005 42I want to make a table with one unique row for each id and then a column for2004 sales and 2005 sales, like this:select a.id, a.sales, b.salesfrom contract a, contract bwhere a.contract=b.contract(+)and a.year=2005and b.year=2004The rows for id 45 and 89 are shown perfectly. But id 12 is not shown at allbecause it doesn't have a record for 2004!! I don't know why 'cause Iouterjoined the tables.It works perfectly when I have two distinct tables for each year (forinstance contract_2005 and contract_2004). So the problem seems to be in thefact I like to join one table with itself.Someone has a solution for this?thanks!Maarten
Hi, I am using SQL SERVER 2005 Express. I am trying to set up Enable a Table for Full-Text Indexing. I am following these instructions: How to: Enable a Table for Full-Text Indexing (SQL Server Management Studio)
Im very very new to sql server world..wanted to know what kind of indexes to be created on the below mentioned table columns for making this view run fastly.As of now there are no indexes created on these view definition columns
CREATE View hrinu.Parity as select T1.Matcle as CorpID, T2.Nmpres as Name, T4.DATDEB as LeaveFrom, T4.TEMDEB as PM, T4.DATFIN as LeaveTo, T4.TEMFIN as AM, T10.LIBLON as LeaveType, T8.LIBLON as Location, T12.LIBLON as ParentOrg
from HRINU.zy00 T1, HRINU.zy3y T2, HRINU.zy39 T3, HRINU.zyag T4, HRINU.zy38 T5, HRINU.zy1s T6, HRINU.zd00 T7, HRINU.zd01 T8, HRINU.zd00 T9, HRINU.zd01 T10, HRINU.zd00 T11, HRINU.zd01 T12 where T4.Nudoss = T3.nudoss and T4.Nudoss = T1.Nudoss and T1.Nudoss = T2.nudoss and T3.nudoss = T5.nudoss and T6.nudoss = T1.nudoss AND T7.NUDOSS = T8.NUDOSS AND T9.NUDOSS = T10.NUDOSS AND T11.NUDOSS = T12.NUDOSS AND T3.IDWKLO = T7.CDCODE AND T4.MOTIFA = T9.CDCODE AND T5.IDESTA = T11.CDCODE and T6.stempl = 'A' and t7.cdstco = 'z04' AND T8.CDLANG = 'U' and t9.cdstco = 'DSJ' AND T10.CDLANG= 'U' and t11.cdstco= 'DRE' AND T12.CDLANG= 'U' and T4.DATDEB <= T3.DTEN00 and T4.DATFIN >= T3.DTEF00 and T3.DTEN00 <= T5.DTEN00 and T3.DTEN00 >= T5.DTEF00 and T6.dtef1s <= getdate() and T6.datxxx > getdate()
Also Please suggest me some links where i can get info about the indexes that has to be created on these types of queries where joins are involved on these many tables. Also throw some light on how to analyse the execution plan for further enhancements.
What sort of script would convert a pre-existing table into the second below?
I only want to merge the columns with Primary_IDs 1111 & 3333 to have the same Secondary_ID values, without duplicating any similar Secondary_ID values between the 2 which I've marked in red below.
Select: C1.firstname, C1.lastname, SP.lastyearsales, A.city From: SalesPerson as SP join Employee as E1 on Sp.salespersonID = E1.EmployeeID Right Join Employee as E2 on E1.EmployeeID=E2.EmployeeID join Address as A on E2.AddressID = A.AddressID Right Join Employee Contact as C1 on E1.ContactID = C1.ContactID
Sorry if this has been asked before, I looked through the FAQ but could not find an answer to the following.
I have a Project table which contains amongst other fields, a CreatedByID field and a LastModifiedByID field. Both these fields point to a User table. What I would like to do is get the two usernames from a query on the project table.
I know how to get one usename using the following Sql command but how do I get access to the second username ?
SELECT Project.Name,User.Username FROM Project,User WHERE Project.ID=@id AND User.ID = Project.CreatedByID;
use default pubs database in sqlserver2000. use authors table and publishers table.
Write a query to list first name, last of all authors and name of the publisher (if any) present in the same city as the author. If no publisher is present in the city where the author is located then the column should contain a NULL value. If there is more than one publisher in the city where the author is located, then the details of the author are to be repeated for each publisher.
but there is no field match between authors table and publishers table.
My main table has the following structure:t1 (id_primary, id_secundary, name) i.e. [(1,1,"name1"), (2,1,"name2")]I want to join this table with the following second table:t2 (id_primary, id_secundary, value) i.e. [(1, NULL, "value1"),(NULL,1,"value2")]The join should first try to find a match on id_primary and only if thatfails it should find a match on id_secundary. Every row in t1 is matchedagainst a single row in t2.The following query works:selecta.name, isnull(b.value, c.value)fromt1 a left outer join t2 b on a.id_primary = b.id_primaryleft outer join t2 c on a.id_secundary = c.id_secundaryI'm wondering though if it would be possible to write a query that only usest2 once, since it actualy is quite a complex query that is calculated twicenow. Any ideas (besides using a temp table)?
I have query that takes 12 minutes to execute. The query uses around 9 tables but I have narrowed down the problem to one table that has over 65 million rows. The problem table has only 3 fields
The query uses the primary key of this table to perform the join. FieldTwo and FieldThree are only used as output parameters.
I noticed if I remove FieldTwo and FieldThree from the output (but still leave the table in the query), the query executes in 1 second. However if I include FieldTwo and FieldThree in the output, the query takes over 12 minutes to execute.
I cannot index FieldTwo and FieldThree because of the field size and I cannot reduce the size of the fields because of the data that needs to be stored in it? How can I index or do something similar to speed up the table look up.
The other day we tried online re-indexing feature of SQL 2005 and it€™s performing faster than offline re-indexing. Could you please validate if it€™s supposed to do be this way? I always thought offline should be faster than online.
Hi,I am using data from multiple databases and/or queries. It would greatlysimplify and speed things up if I could use CONTAINS in processing theresults. However, "CONTAINS" requires the data to be indexed. Due to theamount of processing, I think it would be faster even if I had to re-indexevery time.For example, I would like to do something like this (simplified toillustrate the desired functionality... This should show all of the wordsfrom one table that are not contained in their current or inflectional formswithin another table):SELECT W1.ContentFROM(SELECT Word AS ContentFROM MyTable) W1LEFT OUTER JOIN(SELECT Phrase AS ContentFROM MyOtherTable) W2ON W2.Content CONTAINS(INFLECTIONAL, W1.Content)WHERE W2.Content IS NULLCan the results of a procedure be indexed? If not, can I drop the resultsinto a new table and trigger an automatic index of it, pausing the procedureuntil the indexing is done?Or, it there another way?Thanks!
I have an SP which concatenates 2 columns in a where clause - ie WHERE [Column1] + [Column2] = @var. Â This, as far as I'm aware, is not going to access any seek on an index on a table.
My task is to create an index on this table and get the SP to access said index.
Aside from combining the two columns into one column on the table, how I can get an SP to access the newly created index when queried by the SP?
One thought of mine is to firstly index Column1 and allow the SP to access this index by inserting the rows into a temp table. Â Then a search on the temp table to retrieve the records on a search on Column2.
I'm stuck on something here. Any help would be great. This is a relational database question.
I'm trying to inner join two columns of one table with one column of another. The follwoing code doesn't work, but I think you can see what I'm trying to do.
Procedure _Links_List AS CREATE TABLE #TempTable ( LinkId int, LinkCategory varchar(50), LinkStatus varchar(50), LinkName varchar(50) ) INSERT INTO #TempTable ( LinkId, LinkCategory, LinkStatus, LinkName ) SELECT LinkId, _SubCategories.SubCategoryName, _SubCategories.SubCategoryName, LinkName FROM _Links INNER JOIN _SubCategories ON _Links.CategoryId = _SubCategories.SubCategoryId INNER JOIN _SubCategories ON _Links.StatusId = _SubCategories.SubCategoryId SELECT LinkId, LinkCategory, LinkStatus, LinkName FROM #TempTable
Also, I know how to do this if I had seperate category tables for each category (LinkCategory, LinkStatus). For examlple:
Procedure _Links_List AS CREATE TABLE #TempTable ( LinkId int, LinkCategory varchar(50), LinkStatus varchar(50), LinkName varchar(50) ) INSERT INTO #TempTable ( LinkId, LinkCategory, LinkStatus, LinkName ) SELECT LinkId, _Links_Categories.CategoryName, _Links_StatusCategories.StatusName, LinkName FROM _Links INNER JOIN _Links_Categories ON _Links.CategoryId = _Links_Categories.CategoryId INNER JOIN _Links_StatusCategories ON _Links.StatusId = _Links_StatusCategories.StatustId SELECT LinkId, LinkCategory, LinkStatus, LinkName FROM #TempTable
I know the above works but I'm trying to figure out how to have just one category table and one subcategory table for all of my categories of all my tables.
So instead of having to create a new table for every category and all the procedures for them for all my tables, I want to be able to just use these two tables.
If anyone knows how I go about this, especially when a table uses two category columns, I Thank you.
I am Using MSSQL and ASP Classic for this project. Let me explain my problem, i have two tables:
Users ID Username
ChangeLog ID Description UserID DateChanged
The Users table will contain one record for each user in the system.
The ChangeLog table can contain any number (including 0) of rows relating to each user, when a change to the users account is made, and entry is put into the ChangeLog table.
The object of my report is to display a list of all users in the system and display the date and description of the last change made to the user.
So far i have written this:
Code:
SELECT Users.ID, Users.Name, ChangeLog.Description, ChangeLog.DateChanged FROM Users LEFT OUTER JOIN ChangeLog ON (ChangeLog.UserID = Users.ID) ORDER BY ChangeLog.DateChanged DESC
However, if a user has got more than one change against it then a row will be returned for each change instead of just showing the latest change. So i then tried this:
Code:
SELECT Users.ID, Users.Name, ChangeLog.Description, ChangeLog.DateChanged FROM ChangeLog LEFT OUTER JOIN Users ON (Users.ID = ChangeLog.UserID) ORDER BY ChangeLog.DateChanged DESC
The problem with this one? It only shows users that have actually had a change made to them, and the report *needs* to display ALL users regardless of wether they have been changed or not.
I'd appretiate any help you can give me at all, thanks in advance!
