List Of Keys, Indexes
Oct 29, 2005Hello,
I am new in SQL Server, I have to deal with this big database with many tables, is there any way I can get a list of all primary keys , foreign keys and indexes and on all tables?
Thanks,
ADVERTISEMENT
Creating Indexes On Columns That Are Foreign Keys To Primary Keys Of Other Tables
Jul 16, 2014what the best practice is for creating indexes on columns that are foreign keys to the primary keys of other tables. For example:
[Schools] [Students]
---------------- -----------------
| SchoolId PK|<-. | StudentId PK|
| SchoolName | '--| SchoolId |
---------------- | StudentName |
-----------------
The foreign key above is as:
ALTER TABLE [Students] WITH CHECK ADD CONSTRAINT [FK_Students_Schools]
FOREIGN KEY([SchoolId]) REFERENCES [Schools] ([SchoolId])
What kind of index would ensure best performance for INSERTs/UPDATEs, so that SQL Server can most efficiently check the FK constraints? Would it be simply:
CREATE INDEX IX_Students_SchlId ON Students (SchoolId)
Or
CREATE INDEX IX_Students_SchlId ON Students (SchoolId, StudentId)
In other words, what's best practice for adding an index which best supports a Foreign Key constraint?
Removal Of Selected Indexes / Script Index Create For List Of Indexes
Jul 1, 2014I'm working to improve performance on a database I've inherited, and there are several thousand indexes. I've got a list of ones which should definitely exist within the database, and I'm looking to strip out all the others and start fresh, though this list is still quite large (1000 or so).
Is there a way I can remove all the indexes that are not in my list without too much trouble? I.e. without having to manually go through them all individually. The list is currently in a csv file.
I'm looking to either automate the removal of indexes not in the list, or possibly to generate the Create statements for the indexes on the list and simply remove all indexes and then run these statements.
As an aside, when trying to list all indexes in the database, I've found various scripts to do this, but found they all seem to produce differing results. What is the best script to list all indexes?
Keys And Indexes
May 26, 2008 i have some confusions with keys and indexes.. plz let me know whether the following are correct..- Every Primary Key is a Clustered Index- A Primary Key cannot exist without a Clustered Index- Every Unique Key is a Non-Clustered Index - Non-Clustered Index is the DEFAULT Index- A table can have only 1 Primary key- A table can have only 1 Clustered Index- A table can have any number of Unique Keys- A table can have any number of Non-Clustered Indexes
Indexes In Primary Keys
May 6, 2005I have a 3rd party app which had a primary key with about 5 fields. The last field of this was a trantype. This app had a posting process which uses this in it's sql. Ran rather slow. We added an individual index to this field and cut processing down 90%. It almost seemded like sl server was ignoring this index. Is this because it was the last field in the primary key index?
View 1 Replies View RelatedHow To Drop All Keys && Indexes
Jul 20, 2005I'm trying to drop all indexes and primary keys so that i can rebuild them(from a script created from same database on another server).when i go to the 'generate sql scripts', it has the ability to drop orgenerate alltables. it also has the ability to generate all keys only. but i cant finda wayto drop all of these keys...any ideas?tiawoody rao
View 1 Replies View RelatedCreate An Indexes/Keys Property With T-SQL
May 19, 2004is there a function that i can use in a store procedure that allow me to create an Indexes/Keys Property
thanx
Clustered Indexes On Primary Keys
Aug 18, 2006All of the 3 books I've read say it is not a good idea to create a clustered index on the primary key but it is created as the default. My question is has this changed in 2005? My understanding is to create the clustered index on columns used first in join clauses and then in where clauses, what is the answer?
View 14 Replies View RelatedUnique Colm Indexes And Primary Keys
Jan 25, 2006I have a deal table, each of these investments must be unique. I created a int pk : idDeal. Does that make sense or should i just use the deal colm being it has a unique constraint,
Reguarding indexes, should i make the auto # colm my pk and make that the clustered index? and put another index on the Deal Colmn? Any suggestions welcomed
Thank you
Do Foreign Keys Generate Implicit Indexes?
Sep 21, 2007If i create a simple table with a foreign key constraint, does itcreate an implicit index on that given ID? I've been told this isdone in some databases, but i need to know for sure if SQL Server doesit. Has anyone heard of this before, on any other databses perhaps?Heres an example of how the foreign key constraint is being added:ALTER TABLE [dbo].[administrators] WITH CHECK ADD CONSTRAINT[FPSLUFSUOXZGAJOJ] FOREIGN KEY([AdministratorRoleID])REFERENCES [dbo].[administratorroles] ([AdministratorRoleID])My initial testing seems to indicate adding an index on the foreignkey column helps, but i need to know for sure. Any insight would begreatly appreciated!Bob
View 6 Replies View RelatedTransact SQL :: Find Column ADRSCODE Used In Indexes Or Primary Keys?
Oct 12, 2015I wanted to find all occurrences of ADRSCODE in a Database where ADRSCODE is in either an Index or a Primary Key.
I know how to get all of the occurences of ADRSCODE in a database and the table associated with it, I just want to tack on the Index and/or primary key.
SELECTOBJECT_NAME(object_id)FROMsys.columns
WHEREname
='foo'
How can I get the other bit of information ?
How To List Tables With Primary Keys
Jun 9, 2007Hello,We imported a bunch of tables from a database and realized that theprimary keys weren't copied to the destination db. In order to re-create the keys, we need to know which tables have them. Is there acommand that I can use (on the source db) to find out which tablescontain primary keys? The db has hundreds of tables and I'd rather notgo through each one to see which has a primary key.Also, for future reference, is there a way to include the primary keyon an import?Thanks,Peps
View 2 Replies View RelatedList Primary And Foreign Keys
Jan 10, 2006I have a DB with 100 tables. I was wondering if anybody knows a quick way to list primary and foreign key with the column name for all the tables.
Your help would make my life a lot easier
thanks
SSIS 2000 To 2005 Database Transfer Lost All Primary Keys, Identities And Indexes
Mar 25, 2008Hi everyone, I am trying to upgrade a 2000 DB to 2005 with SSIS Database Transfer.
I finally got it to work with an online transfer but the destination database has no primary keys, indexes or identity columns from the source DB.
What am I missing?
What other ways are there to upgrade a SS2000 DB to 2005?
Thank you.
Query To List All Indexes In Db
Oct 17, 2007Can someone help me with Query to list all indexes (name, table, field etc.) on a particular user/dbo database in sqlserver.
Thanks
T-SQL (SS2K8) :: Combining Keys To Create A Master List?
Mar 5, 2014I am struggling trying to clean some data and identify duplicate records. I used fuzzy grouping in SSIS and provided back a series of groups. The issue is some of the individual records can appear in multiple groups (so in reality the groups should be combined). This is best explained with an example:
Original Data
key1 key2
647942600014
647942285437
2324662490640
2324662285437
2324662066128
2222 2285437
2222 1111111
9999 1111111
9999 2222222
Should look like:
22222600014
22222285437
22222490640
22222066128
22221111111
22222222222
I only choose 2222 as the surviving key because it was the smallest number. I really do not care which number remains as long as it is the same across.
I tried playing with self joins between the tables but have had no success.
I am using Sql Server 2008 and the number of records could 500K to 1MM.
Getting List Of Indexes Accross Servers
Mar 30, 2000Is there anyway that I can run a procedure that will give me all the indexes on tables that are accross multiple servers?
Thanks for any help.
Dianne
How To List Tables,indexes,views Etc...
Jun 16, 2003Hi,
I want to list the table names in a database "mydev_db".What would be the query ?.
I want to run a similar query to find out the indexes,views,stored_procs etc.
Regards,
Copernicus
Query To List Indexes From A Table ?
Sep 1, 2006How can I list indexes with a (SQL) query ?
Thanks
SQL Server 2008 :: Display List Of Indexes - Add Database Name In Results
Apr 6, 2015I written a proc to display the list of Indexes But I needed to print the database where the objects do belong to. How I should write the Dynamic script to add the database Id? I thought to use derived table kind of stuff, but unable to find a solution.
ALTER PROC [dbo].[USP_INDEXCHECK]
AS
DECLARE @sql NVARCHAR(max)
DECLARE @DB VARCHAR(max)
DECLARE databasecursor CURSOR FOR
[Code] .....
DB Engine :: How To Find List Of Indexes On Tables On Which Views Has Been Created
Aug 28, 2015The views are in XYZ production database and user needs the list of indexes on the tables on which the views has been created.
query to find list of indexes on the tables on which the views has been created.
Composite Primary Keys Versus Composite Unique Indexes
Feb 20, 2007Hello,
I have a table which has a composite primary key consisting of four columns, one of them being a datetime called Day.
The nice thing afaik with this composite key is that it prevents duplicate entries in the table for any given day. But the problem is probably two-fold
1. multiple columns need to be used for joins and I think this might degrade performance?
2. in client applications such as asp.net these primary keys must be sent in the query string and the query string becomes long and a little bit unmanagable.
A possible solutions I'm thinking of is dropping the existing primary key and creating a new identity column and a composite unique index on the columns from the existing composite key.
I would like to have some tips, recommendations and alternatives for what I should do in this case.
Creating Inter-table Relationships Using Primary Keys/Foreign Keys Problem
Apr 11, 2006Hello again,
I'm going through my tables and rewriting them so that I can create relationship-based constraints and create foreign keys among my tables. I didn't have a problem with a few of the tables but I seem to have come across a slightly confusing hiccup.
Here's the query for my Classes table:
Code:
CREATE TABLE Classes
(
class_id
INT
IDENTITY
PRIMARY KEY
NOT NULL,
teacher_id
INT
NOT NULL,
class_title
VARCHAR(50)
NOT NULL,
class_grade
SMALLINT
NOT NULL
DEFAULT 6,
class_tardies
SMALLINT
NOT NULL
DEFAULT 0,
class_absences
SMALLINT
NOT NULL
DEFAULT 0,
CONSTRAINT Teacher_instructs_ClassFKIndex1 FOREIGN KEY (teacher_id)
REFERENCES Users (user_id)
)
This statement runs without problems and I Create the relationship with my Users table just fine, having renamed it to teacher_id. I have a 1:n relationship between users and tables AND an n:m relationship because a user can be a student or a teacher, the difference is one field, user_type, which denotes what type of user a person is. In any case, the relationship that's 1:n from users to classes is that of the teacher instructing the class. The problem exists when I run my query for the intermediary table between the class and the gradebook:
Code:
CREATE TABLE Classes_have_Grades
(
class_id
INT
PRIMARY KEY
NOT NULL,
teacher_id
INT
NOT NULL,
grade_id
INT
NOT NULL,
CONSTRAINT Grades_for_ClassesFKIndex1 FOREIGN KEY (grade_id)
REFERENCES Grades (grade_id),
CONSTRAINT Classes_have_gradesFKIndex2 FOREIGN KEY (class_id, teacher_id)
REFERENCES Classes (class_id, teacher_id)
)
Query Analyzer spits out: Quote: Originally Posted by Query Analyzer There are no primary or candidate keys in the referenced table 'Classes' that match the referencing column list in the foreign key 'Classes_have_gradesFKIndex2'. Now, I know in SQL Server 2000 you can only have one primary key. Does that mean I can have a multi-columned Primary key (which is in fact what I would like) or does that mean that just one field can be a primary key and that a table can have only the one primary key?
In addition, what is a "candidate" key? Will making the other fields "Candidate" keys solve my problem?
Thank you for your assistance.
Generate Script For Primary Keys And Foreing Keys
May 16, 2008
Pls let me know How I generate script for All primary keys and foreign keys in a table. Thereafter that can be used to add primary keys and foreign keys in another databse with same structure.
Also how I script default and other constraints of a table?
Urgent !!!!! Nee Explanation On Primary Keys And FK Keys
Jul 15, 2002Can somebody explain to me how to best do inserts where you have primary keys and foreign keys.l'm battling.
Is there an article on primary keys/Pk ?
Foreign Keys - On Which Kind Of Keys Do The Base On?
Nov 22, 2007Hello!I have a table A with fields id,startdate and other fields. id and startdateare in the primary key.In the table B I want to introduce a Foreign key to field id of table A.Is this possible? If yes, which kind of key I have to build in table A?Thx in advance,Fritz
View 6 Replies View RelatedAuto Incremented Integer Primary Keys Vs Varchar Primary Keys
Aug 13, 2007Hi,
I have recently been looking at a database and wondered if anyone can tell me what the advantages are supporting a unique collumn, which can essentially be seen as the primary key, with an identity seed integer primary key.
For example:
id [unique integer auto incremented primary key - not null],
ClientCode [unique index varchar - not null],
name [varchar null],
surname [varchar null]
isn't it just better to use ClientCode as the primary key straight of because when one references the above table, it can be done easier with the ClientCode since you dont have to do a lookup on the ClientCode everytime.
Regards
Mike
A Question About Clustered Indexes Forcing Rebuild Of Non-clustered Indexes.
Sep 18, 2007So I'm reading http://www.sql-server-performance.com/tips/clustered_indexes_p2.aspx and I come across this:
When selecting a column to base your clustered index on, try to avoid columns that are frequently updated. Every time that a column used for a clustered index is modified, all of the non-clustered indexes must also be updated, creating additional overhead. [6.5, 7.0, 2000, 2005] Updated 3-5-2004
Does this mean if I have say a table called Item with a clustered index on a column in it called itemaddeddate, and several non-clustered indexes associated with that table, that if a record gets modified and it's itemaddeddate value changes, that ALL my indexes on that table will get rebuilt? Or is it referring to the table structure changing?
If so does this "pseudocode" example also cause this to occur:
sqlstring="select * from item where itemid=12345"
rs.open sqlstring, etc, etc, etc
rs.Fields("ItemName")="My New Item Name"
rs.Fields("ItemPrice")=1.00
rs.Update
Note I didn't explicitly change the value of rs.fields("ItemAddedDate")...does rs.Fields("ItemAddedDate")=rs.Fields("ItemAddedDate") occur implicitly, which would force the rebuild of all the non-clustered indexes?
SQL 2012 :: List All Different Values That Go With Single CAS ID To Appear As Comma Separate List
Jun 15, 2015So at the moment, I don't have a function by the name CONCATENATE. What I like to do is to list all those different values that go with a single CASE_ID to appear as a a comma separate list. You might have a better way of doing without even writing a function
So the output would look like :
CASE_ID VARIABLE
=====================
1 [ABC],[HDR],[GHHHHH]
2 [ABCSS],[CCHDR],[XXGHHVVVHHH],[KKKJU],[KLK]
SELECT
preop.Case_ID,
dbo.Concatenate( '[' + CAST(preop.value_text AS VARCHAR) + ']' ) as variable
FROM
dbo.TBL_Preop preop
WHERE
preop.Deleted_CD = 0
GROUP BY
preop.Case_ID
Report Designer: Need To List Fields From Multiple Result Rows As Comma Seperated List (like A JOIN On Parameters)
Apr 9, 2008
I know I can do a JOIN(parameter, "some seperator") and it will build me a list/string of all the values in the multiselect parameter.
However, I want to do the same thing with all the occurances of a field in my result set (each row being an occurance).
For example say I have a form that is being printed which will pull in all the medications a patient is currently listed as having perscriptions for. I want to return all those values (say 8) and display them on a single line (or wrap onto additional lines as needed).
Something like:
List of current perscriptions: Allegra, Allegra-D, Clariton, Nasalcort, Sudafed, Zantac
How can I accomplish this?
I was playing with the list box, but that only lets me repeat on a new line, I couldn't find any way to get it to repeate side by side (repeat left to right instead of top to bottom). I played with the orientation options, but that really just lets me adjust how multiple columns are displayed as best I can tell.
Could a custom function of some sort be written to take all the values and spit them out one by one into a comma seperated string?
Insert Value List Doest Not Match Column List
Apr 18, 2007HI...
I need to do a simple task but it's difficult to a newbie on ssis..
i have two tables...
first one has an identity column and the second has fk to the first...
to each dataset row i need to do an insert on the first table, get the @@Identity and insert it on the second table !!
i'm trying to use ole db command but it's not working...it's showing the error "Insert Value list doest not match column list"
here is the script
INSERT INTO Address(
CepID,
Street,
Number,
Location,
Complement,
Reference)Values
(
?,
?,
?,
?,
?,
?
)
INSERT INTO CustomerAddress(
AddressID,
CustomerID,
AddressTypeID,
TypeDescription) VALUES(
@@Identity,
?,
?,
?
)
what's the problem ??
SQL Server 2008 :: Logic To Rebuild Only Clustered Indexes / Skipping To Rebuild Non Clustered Indexes In Same Table
Jun 25, 2015I have a requirement to only rebuild the Clustered Indexes in the table ignoring the non clustered indexes as those are taken care of by the Clustered indexes.
In order to do that, I have taken the records based on the fragmentation %.
But unable to come up with a logic to only consider rebuilding the clustered indexes in the table.
create table #fragmentation
(
FragIndexId BigInt Identity(1,1),
--IDENTITY(int, 1, 1) AS FragIndexId,
DBNAME nvarchar(4000),
TableName nvarchar(4000),
[Code] ....
Indexes Vs Clustered Indexes
Sep 17, 2006What is the difference please?
View 1 Replies View Related