Select Primary Key Column
Feb 22, 2007Is there a query that can return teh name of the primary key column of a table ?
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T-SQL (SS2K8) :: Cannot Define Primary Key Constraint On Nullable Column But Column Not Null
Sep 30, 2014We have a database where many tables have a field that has to be lengthened. In some cases this is a primary key or part of a primary key. The table in question is:-
/****** Object: Table [dbo].[DTb_HWSQueueMonthEnd] Script Date: 09/25/2014 14:05:09 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[DTb_HWSQueueMonthEnd](
[Code] ....
The script I am using is
DECLARE@Column varchar(100)--The name of the column to change
DECLARE@size varchar(5)--The new size of the column
DECLARE @TSQL varchar(255)--Contains the code to be executed
DECLARE @Object varchar(50)--Holds the name of the table
DECLARE @dropc varchar(255)-- Drop constraint script
[Code] ....
When I the the script I get the error message Could not create constraint. See previous errors.
Looking at the strings I build
ALTER TABLE [dbo].[DTb_HWSQueueMonthEnd] DROP CONSTRAINT PK_DTb_HWSQueueMonthEnd
ALTER TABLE [dbo].[DTb_HWSQueueMonthEnd] Alter Column [Patient System Number] varchar(10)
ALTER TABLE [dbo].[DTb_HWSQueueMonthEnd] ADD CONSTRAINT PK_DTb_HWSQueueMonthEnd PRIMARY KEY NONCLUSTERED ([Patient System Number] ASC,[Episode Number] ASC,[CensusDate] ASC)
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
They all seem fine except the last one which returns the error
Msg 8111, Level 16, State 1, Line 1
Cannot define PRIMARY KEY constraint on nullable column in table 'DTb_HWSQueueMonthEnd'.
Msg 1750, Level 16, State 0, Line 1
Could not create constraint. See previous errors.
None of the fields I try to create the key on are nullable.
Differnce Between A Column That S A Primary Key And A Column That S A Key/index With Isunique=true
Sep 13, 2007
Hi,
Please, What s the differnce between a column that s a primary key and a column that s a "key/index with Isunique=true"?
Thanks a lot.
Select Query Help+primary Key
Jul 25, 2006Hey I want to get some data from some tables but I want every fieldexcept the primary key field returned. Is this possible?I.e SELECT * (except primary) FROM table1, table2, table3Any ideas??
View 2 Replies View RelatedGet Primary Key Column
May 29, 2005Hello, this SQL query gets all columns of a table:
SELECT syscolumns.name AS [Fields in Items Database], syscolumns.type,
syscolumns.length, syscolumns.isnullable FROM sysobjects INNER JOIN
syscolumns ON sysobjects.id = syscolumns.id WHERE sysobjects.name =
'IssueTracker_IssueAttachments' ORDER BY syscolumns.colid
I would like to know, is there a way to get a column saying who is the
primary key in the table ? I am reading columns for tables and
processing them, but I would like to know who is the primary key, is
that possible ?
regards
Primary Key Vs Identity Column
Jan 22, 2007What is the different between Primary key and Identity Column? and when should I them?
(Im just a beginner with databases...)
How To Drop Primary Key By Specifying Column Only?
Apr 24, 2007I checked column from xsd file which created from DataBase.
And before installing my application I will check any column in destination base whether have complete column or not.
And if there is any column which is not wanted column(not same as xsd structure)
I will delete it by creating sql command as follow "ALTER TABLE tableName DROP COLUMN column1, column2, ......"
and Execute it by program initialization.
So
I need delete it by run-time
However some column may be Primary Key with any reason
That's why I can't delete them by simple command
I expect to delete them by specific column instead of specific constraint name which is not sure name.
Please advise me....
SQL Set Primary Key On Existing Column
Nov 28, 2007Hi everyone,How do I set a primary key on an existing column using SQL statements? I have column persID of type int in table employees. How do I correctly apply the ALTER command to change persID type to INT IDENTITY(1,1) NOT NULL? Thanks in advance
View 5 Replies View RelatedPrimary Key VS Identity Column
Apr 5, 2000Can anyone explain the Difference between Primary Key and Identity Column in MSSQL Server 6.5. Please give me any example if possible.
Thanks for Help!!!!
Can A Column Act As Both Primary Key And Foreign Key?
Sep 11, 2011Can a column act as both primary key and foreign key, if so what is script.
And can a table have more than one primary keys/foreign keys, if so what is the script.
Rename Primary Key Column?
Jul 22, 2014will there be any issues if i rename a primary key column name,which is already beging referenced as a foreign key by other tables.
View 1 Replies View RelatedOne Primary Key To Two Column In Same Table
Feb 9, 2015I have a table name Dispatch with the following column
ID,Date, Name, Pickup, Going
I have a next table called Move with the following column
ID, MoveName
I link Move table with Dispatch table via relationship.
ID_Pickup, ID_Going
upon running query no data is shown unless i remove one of the column form the query either pickup or going ...
Ghost Primary Key Column
Jun 25, 2006Hello,I have a table 'customers', with 2 records:SELECT * FROM customers;customerID | customerName------------------+-------------------------myFriend | myFriend's Nametest | testing user(2 rows)but when I'm asking about customerID column, I get the answer:SELECT customerID FROM customers;ERROR: column "customerid" does not existWhat happens? I'm using PostgreSQL 8.1.3
View 4 Replies View RelatedColumn Name In A Primary Key Constraint
Jul 20, 2005Hi allWould there be a easy way to find the column name(s) which constitutea Primary constraint for a table through navigating the systemcatalogs.I found that the PK Constraint object in syscontraints is showing thecolid = 0.TIANorman
View 2 Replies View RelatedDuplication In The Primary Key Column
Sep 21, 2006Hi
I have a set of excel files that i need to export to sql2005 using ssis. Now the issue is that i have no idea about he data ie it may have duplication in the primary key column. If i export it as it is to sql server, it will cause me problems. Is there any way i can filter out the rows which have duplication in the primary key column?
Umer
How To Knw Which Column Is Primary Key In A Table
May 1, 2006hi all
my question is which query shud i use in sql server 2000 to get which column or columns are primary keys of table
i dont want to use any stored procedures only sql query
sp_primary_keys_rowset is one of d stored proc in sql server 2005 but i couldn't understand which query they are using
i only want to use sql query
Determin Name Of Primary Column
Aug 6, 2006given the name of any table how can i programmatically get the name of the primary key column?
View 1 Replies View RelatedTransact SQL :: Select Value Only If It Belongs To One Primary Key Otherwise Return Null
Jul 18, 2015Using TSQL, I have a table that holds filenames of Pictures for products. Different products can be using the same picture. I need to select the filenames for a single product only if it does not exists for a different product.I have tried Where Exists (select FileName From Tbl where
Prod_Id = @var) AND NOT EXISTS(select FileName From Tbl where
Prod_Id != @var) In the Select Statement.
Designating An Identity Column When You Already Have Primary Key
Jan 13, 2007Hello --
Following normal practice, I have an autoincrementing identity column designated as primary key in my table. I have two other columns that should also contain unique values per record, but the Identity option is greyed out (in Management Studio) for all columns other than the primary key.
I'm enforcing this programmatically (in my C# code) at this point, but I'd like to back that up with a constraint in the database itself.
Any help is appreciated.
Eric
Getting Primary Key Column Names For All Tables
Sep 9, 1999I have a situation in which i have to get the last value stored in the Primary Key for all the tables. Based on this value i have to update another table which stores the Table names and the last Key value for the table. The values in this table are not correct therefore i have to update it now. I was trying to write a cursor for this but the only problem is i can't get to know how to get the column name on which the primary key is defined for all the tables, thru code.
I would appreciate if someone could help me out with this.
Problems With Computing A Primary Key Column
Sep 13, 2006hi !
Just started playing around with SQL 2000 and I createda sample table called 'actor' which has 4 columns
1. actorID
(formula= LEFT(NEWID(), 3)+ LEFT([actorFirst], 2) +
LEFT([actorLast], 2) + RIGHT(NEWID(), 3))
2. actorFirst
varchar(20) NOT NULL
3. actorLast
varchar(20) NOT NULL
4. actorName
(formula = [actorFirst] + ' ' + [actorLast]
Now my problem is that I want to set a primary key constraint on actorID but it doesn't let me because it the NULL check mark is automatically checked and I cannot check it off ... and I can't set a primary key on something which is allowed to be NULL....
I don't understand why 'actorName' column which is also calculated doesn't have that default NULL checked and locked ....
What am I doing wrong ? Please help ....
Creating Primary Key On Nullable Column
Feb 29, 2008Hello,
I am trying to recreate a primary key that I dropped in a table....
I'm using a statement like
ALTER TABLE temp WITH NOCHECK add CONSTRAINT PK__tempkey PRIMARY KEY CLUSTERED
(
num,
store
)
But apparently the "store" column was created without a "not null" and it let it create the PK during the table creation but now it won't let me add the PK with that nullable column..
Does anyone know how to get it to use that column to create a primary key after the initial table creation?
Here is the error i get
Cannot define PRIMARY KEY constraint on nullable column in table
Thanks a lot
Identity Column Primary Key Vs Custom Key
May 22, 2008We are developing a batabase which is meant for financial domain,so it will import data from different source system..
and data from our data base will be further passed to other applications.
In contex of our system integration with other data sources ,whether is it a good idea to have a auto integer primary key a or to implement some logic to generate primary key?
Can some one guide us to some pratical data base design case studies?or some best practices.?
Unsorted Primary Key Column In SQL Server Database
Oct 25, 2007Update: Changed original post as I figured it was not the problem I stated.
Hi all,
Heres the problem. I have a table in SQL Server with two fields, PartSubCategory and PartCatID. PartSubCategory is the primary key. When I import an excel sheet with identical columns into this table, the primary key column in the table gets sorted automatically (alphabetically). I don't want this column sorted but to import the rows from excel in the order as they were. Is this some indexing issue? Is there a fix?
Thanks a lot...Bullpit
Adding Column With Primary Key In Existing Table
Jan 21, 2014I want to add new primary key into existing table which already has a primary key. But,I do not want to remove the old primary key, since there are many records and the old primary key also have relationship with other table
When I am using this query:
alter table hem154
add indexNO uniqueidentifier default newid()
alter table hem154
add CONSTRAINT pk_hem154_indexNo PRIMARY KEY (PK_indexNO)
go
Note:
Hem154 ~ Table name
indexNo ~ Column Name
I get this runtime error:
Msg 1779, Level 16, State 0, Line 1
Table 'hem154' already has a primary key defined on it.
Msg 1750, Level 16, State 0, Line 1
Could not create constraint. See previous errors.
Creating A Primary Key Column In SQL Server 2005
Feb 1, 2008I have a varchar column in a table, which is an unique key column. Now when I design this table should I use this column as a primary key or should I add one more Integer column as a primary key column for the performance?
One more point is, when ever I do a search on this table I will search based on that unique varchar column values only, so even then if I add new integer column just for Primary key I will not use this column for searching values.
With these information, can some body help me in deciding this?
Creating A New Numbered Column As Primary Key In A Table
Jul 23, 2005This is a fairly simple question, but what is the easiest way to:create a new numbered column (where value is simply the row number) inan existing table and setting it as a primary key?
View 1 Replies View RelatedReporting Services :: How To Drop Primary Key Column
Jun 9, 2015How to drop the primary key Column in Sql and How to drop Primary key Constraint From Column at Table in Sql.
View 6 Replies View RelatedHow To Find All Tables That Have An Identity Column As A Primary Key
Mar 6, 2008How do i find all the tables that have an Identity Column as a primary key in a database. Thanks.
View 8 Replies View RelatedPartitioning Table Based On A Non Primary Key Column
Oct 25, 2007We are facing few issues pertaining to creation of primary key on a non - partitioned column in sql server 2005. Herewith attaching the text file containing the detailed scenario.
Pls advice.
Pls find some of the scenario with the example given below:
We have done the following steps
1.Creating a Partition Function
CREATE PARTITION FUNCTION pf_EncounterODS_StateID (CHAR(2))
AS RANGE RIGHT FOR VALUES
(
'CA', -- CA
'MI', -- MI
'NM', -- NM
'OH', -- OH
'TX', -- TX
'UT', -- UT
'WA' -- WA
)
GO
2.Creating a Partition Schema
CREATE PARTITION SCHEME [ps_EncounterODS_StateID]
AS PARTITION pf_EncounterODS_StateID TO
(
[PRIMARY],
[ENC_DM_DATA_01], -- CA
[ENC_DM_DATA_03], -- MI
[ENC_DM_DATA_04], -- NM
[ENC_DM_DATA_05], -- OH
[ENC_DM_DATA_06], -- TX
[ENC_DM_DATA_07], -- UT
[ENC_DM_DATA_02] -- WA
)
GO
3.Creating a table using above partitioned schema
CREATE TABLE [dbo].[Fact] (
[ValidationErrorSID] [bigint] NOT NULL IDENTITY(1,1),
[ProcessID] [int] NULL ,
[StateID] [char] (2) NOT NULL ,
[ClaimID] [char] (15) NULL ,
) ON [ps_EncounterODS_StateID](StateID)
4.Creating a primary key on validationErrorSID column in the fact table
ALTER TABLE [Fact] ADD CONSTRAINT NQValidationError PRIMARY KEY CLUSTERED ([ValidationErrorSID])
Step 4 throws an error as
---------------------------------
Column 'StateID' is partitioning column of the index 'NQValidationError'. Partition columns for a unique index must be a subset of the index key.
If we include StateID along with ValidationErrorSID for index,then it works fine.But we need to have only ([ValidationErrorSID]) for indexing.
Multi Column Primary Key's In Access Using ADOX [c#]
Jan 15, 2008Hi all,
I have been pulling my hair trying to figure out what the guys at microsoft were thinking when creating the ADOX library. I have an access table that is syncronized with a SQL server. The table has a primary key with two columns [User] and [Program]. The SQL Server has both columns in as the primary key columns and I have a syncronization mechanism that is responsible for several things, one of which is to recreate the Access data structure. All works well for all tables except this one. I have tried to create the multi-column key in several ways, none that worked. Let me show you what I am doing:
CatalogClass catDCDLocal;
Column c;
catDCDLocal = new CatalogClass();
catDCDLocal.let_ActiveConnection(dbAccess.buildConnectionString(Settings.CattDCDLocalPath, Settings.SecurityDBPath, s.UserID, s.Password));
foreach (Table tbl in catDCDLocal.Tables) {
if (tbl.Name == "Users") {
/* This is retarded so need to clean up... Users table has a primary key consisting of 2 columns */
for (int i = tbl.Keys.Count - 1; i >= 0; i--) { //remove the keys
tbl.Keys.Delete(i);
}
for (int i = tbl.Indexes.Count - 1; i >= 0; i--) { //remove the indexes
tbl.Indexes.Delete(i);
}
tbl.Keys.Append("PrimaryKey", KeyTypeEnum.adKeyUnique, "User", "", "");
tbl.Keys[0].Columns.Append("Program", DataTypeEnum.adWChar, 6);
}
}
I have also tried:
tbl.Keys.Append("PrimaryKey", KeyTypeEnum.adKeyUnique, "User", "", "");
//tbl.Keys[0].Columns.Append("Program", DataTypeEnum.adWChar, 6);
Key k = tbl.Keys[0];
Column col = tbl.Columns["Program"];
//col.ParentCatalog = catDCDLocal;
k.Columns.Append(col, DataTypeEnum.adWChar, 6);
Nothing works for me ;-(
SQL Server 2012 :: How To Add A Primary Key For Existing Column In The Table
Oct 19, 2015How to add a primary key for existing column in the table
View 8 Replies View RelatedDB Design :: Add A New Int Identity Column As Primary Key To Already Existing Table
Sep 3, 2015We want to add a new int identity column as a primary key to an already existing table that has a primary key on Guid. Here is the DDL:
CREATE TABLE [dbo].[VRes](
[VResID] [uniqueidentifier] NOT NULL,
[Mes] [varchar](max) NOT NULL,
[PID] [uniqueidentifier] NOT NULL,
[Segt] [int] NOT NULL,
[code]....
Also we currently have 3 million rows on this table. Is having an integer column as identity column and primary key better or shd I consider using BigInt?