Adding Primary Key To A Table Which Has Already A Primary Key
Aug 28, 2002Hi all,
Can anyone suggest me on Adding primary key to a table which has already a primary key.
Thanks,
Jeyam
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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.
Query Based Off Primary Key Of Parent Table - Adding Child Table
Jan 28, 2012I need to add a child table that will tell us who the participants counselor is, what I did was I did a Make Table query based off the primary key of the Parent table and made that the link (foreign key) for the People_tbl and the Counselor_tbl, so if the counselor changes then the user adds the record to the counselor tbl and then puts in the Effective date. The problem is that when I run a report it doesn't show the present counselor always shows the old counselor?
Code:
SELECT Student_ind.StudentFirstName, Student_ind.StudentLastName, Student_ind.[Student ID], People_tbl.[Family ID], People_tbl.FirstName,
People_tbl.LastName, People_tbl.[Parent ID]
FROM People_tbl RIGHT OUTER JOIN
Student_ind ON People_tbl.[Family ID] = Student_ind.[Family ID]
WHERE (People_tbl.LastName = @Enter_LastName) AND (People_tbl.FirstName = @Enter_FirstName)
DB Design :: More Than One Table Primary Key Adding In Single Foreign Key Column
Nov 6, 2015I have come up with one scenarios where I have three table like Product, Services and Subscription. I have to create one table say Bundle where I can have some of the product id , service id and Subscription id , i.e. a bundle may contains sum prduct , services and subscription . How I can design these relations ?
View 3 Replies View RelatedTransact SQL :: Value Of Adding Identity Primary Key On Table Where Search / Queries Will Not Use It?
Oct 12, 2015I have a table of raw data where each column can be null. The thought was to create an identity key (1,1) and set as primary for each row. (name/ address / zip/country/joindate/spending) with surrogate key: "pkid".However other queries will not use this primary key. So for instance they may count the # of folks at a zip, select all names, addresses etc. The queries may order by join date, or select all the people that joined on a specific date.No other code would logically use the primary key (surrogate primary id key), therefore would it still have any performance benefits? at this time the table would have no clustured or nonclustured indexes or keys. I'm curious if there are millions of records.
View 7 Replies View RelatedHow Can I Specify A Name When Adding A Primary Key?
Aug 30, 2001Im using
ALTER TABLE mytable ADD PRIMARY KEY(mycolumn)
I want to use a specific name like PK_mycolumn, how the heck is this done?
thanks!
How To Auto-increment Primary Key When Adding A New Row Using Update Method?
Jul 26, 2007Hi guys,I followed the ASP.net official tutorial to create a DAL & Business Logic Layer (http://www.asp.net/learn/dataaccess/tutorial02cs.aspx). I have a table with a int ID field. I wish to write a function to add a new entry into this table but have the ID field auto-increment.The ID field is set as the Identity Column and has a Identity Increment & Seed of "1". If I manually go to the table and insert a new record leaving the ID value null it automatically increments. But if I create a C# function to add a new entry I get an error saying that the ID field can't be Null. Is there any way to use the Update method as shown on line 14 below to add a new entry but with it automatically incrementing? I did create a function called InsertDevice that simply inserts the other fields using a SQL INSERT and it auto-increments fine, just wondering if there is a way to do it using the DataTable and the Update method? Thanks for any help!!! 1 public bool AddDevice(string make, string model)
2 {
3 //cannot have the same device entered twice!
4 if (Adapter.FillDeviceCountByMakeModel(make, model) == 1)
5 return false;
6
7 RepositoryDataSet.DevicesDataTable devices = new RepositoryDataSet.DevicesDataTable();
8 RepositoryDataSet.DevicesRow device = devices.NewDevicesRow();
9
10 device.make = make;
11 device.model = model;
12
13 devices.AddDevicesRow(device); << Error thrown Here!
14 int rows_affected = Adapter.Update(devices);
15
16 return rows_affected == 1;
17 }
Convert Composite Primary Key Into Simple Primary Key
Jan 11, 2007Uma writes "Hi Dear,
I have A Table , Which Primary key consists of 6 columns.
total Number of Columns in the table are 16. Now i Want to Convert my Composite Primary key into simple primary key.there are already 2200 records in the table and no referential integrity (foriegn key ) exist.
may i convert Composite Primary key into simple primary key in thr table like this.
Thanks,
Uma"
Auto 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
SQL Server 2008 :: Change Primary Key Non-clustered To Primary Key Clustered
Feb 4, 2015We have a table, which has one clustered index and one non clustered index(primary key). I want to drop the existing clustered index and make the primary key as clustered. Is there any easy way to do that. Will Drop_Existing support on this matter?
View 2 Replies View RelatedPrimary Key Per Table
Dec 2, 2013There is a restriction that we must have only one primary key per table. We can have composite primary key by defining primary key over 2 or more columns. Actually,, a primary key uniquely defines the table and if we have two or more columns which follow unique and not null features why can't we have two primary keys?? I want to know what is the main reason behind having only one primary key in a table??
View 3 Replies View RelatedWhat Happens If A Table Has No Primary Key?
Jul 23, 2005I ran into a table that is used a lot. Well less than100,000 records. Maybe not a lot of records but i believethis table is used often. The table has 26 fields, 9 indexesbut no Primary Key at all!There are no table relationships defined in this database, noNatural keys, only Surrogate keys in the database.1- Maybe an odd question but is it normal to have 1/3 of thetable's fields as indexes? Is this a valid question or it reallydoesn't matter if you have 9 indexes if they are appropriate to beindexes?2- Below is the DDL of the indexes (Is DDL the appropriate termto describe the indexes?) Without going into too technical aboutwhat the table is, what relationships it has with other tables,would you be able to tell if the indexes are good, bad, too many,etc?3- If i open the table in DESIGN view in SQL EM, i don't seethe Primary key icon. Yet here i see the words "PRIMARY KEYNONCLUSTERED". Does this mean UNIQUENO is actually some typeof primary key? If it was CLUSTERED then SQL EM would showUNIQUEID with a key to the left it identifying it as a PK?If that is the case, then what is the difference betweenPRIMARY KEY NONCLUSTEREDandPRIMARY KEY CLUSTERED?CREATE UNIQUE CLUSTERED INDEX [TBLTEST_PK] ON[dbo].[TBLTEST]([UNIQUENO]) WITH FILLFACTOR = 80 ON [PRIMARY]GOCONSTRAINT [PK_TBLTEST] PRIMARY KEY NONCLUSTERED([UNIQUENO]) ON [PRIMARY]GOCREATE UNIQUE INDEX [ASSIGNUNIQUENAME] ON[dbo].[TBLTEST]([USERNO], [STARTDATE], [NAME]) WITHFILLFACTOR = 80 ON [PRIMARY]GOCREATE INDEX [ENDDATE] ON [dbo].[TBLTEST]([ENDDATE]) WITH FILLFACTOR = 80 ON [PRIMARY]GOCREATE UNIQUE INDEX [IUSERASSIGNACT] ON[dbo].[TBLTEST]([USERNO], [TASKNO], [PROCESSENTRYNO])WITH FILLFACTOR = 80 ON [PRIMARY]GOCREATE INDEX [STARTDATE] ON [dbo].[TBLTEST]([STARTDATE]) WITH FILLFACTOR = 80 ON [PRIMARY]GOCREATE INDEX [PROCESSENTRYNOTBLTEST] ON[dbo].[TBLTEST]([PROCESSENTRYNO]) WITHFILLFACTOR = 80 ON [PRIMARY]GO/****** The index created by the following statementis for internal use only. ******//****** It is not a real index but exists asstatistics only. ******/if (@@microsoftversion > 0x07000000 )EXEC ('CREATE STATISTICS [Statistic_NAME] ON[dbo].[TBLTEST] ([NAME]) ')GOCREATE INDEX [TASKNO_IDX] ON [dbo].[TBLTEST]([TASKNO]) WITH FILLFACTOR = 80 ON [PRIMARY]GOCREATE INDEX [TBLTEST_ORGANIZATIONNO_IDX] ON[dbo].[TBLTEST]([ORGANIZATIONNO]) WITHFILLFACTOR = 80 ON [PRIMARY]GOCREATE INDEX [TASKNOUSERNO] ON [dbo].[TBLTEST]([USERNO], [TASKNO]) WITH FILLFACTOR = 80 ON [PRIMARY]GOThank you
View 4 Replies View RelatedPrimary Key Of Table
Mar 21, 2008Hi to all.
I have a table with about 8 columns as a primary key. I would like to delete one column but not destroy the other 7 primary keys and their relationships between the other tables. Is it possible to do this?
Thanks.
4 Key Primary Key Vs 1 Key 'artificial' Primary Key
Jan 28, 2004Hi all
I have the following table
CREATE TABLE [dbo].[property_instance] (
[property_instance_id] [int] IDENTITY (1, 1) NOT NULL ,
[application_id] [int] NOT NULL ,
[owner_id] [nvarchar] (100) NOT NULL ,
[property_id] [int] NOT NULL ,
[owner_type_id] [int] NOT NULL ,
[property_value] [ntext] NOT NULL ,
[date_created] [datetime] NOT NULL ,
[date_modified] [datetime] NULL
)
I have created an 'artificial' primary key, property_instance_id. The 'true' primary key is application_id, owner_id, property_id and owner_type_id
In this specific instance
- property_instance_id will never be a foreign key into another table
- queries will generally use application_id, owner_id, property_id and owner_type_id in the WHERE clause when searching for a particular row
- Once inserted, none of the application_id, owner_id, property_id or owner_type_id columns will ever be modified
I generally like to create artificial primary keys whenever the primary key would otherwise consist of more than 2 columns.
What do people think the advantages and disadvantages of each technique are? Do you recommend I go with the existing model, or should I remove the artificial primary key column and just go with a 4 column primary key for this table?
Thanks Matt
Finding The Primary Key Of A Table.
Dec 3, 2007I'm trying to find the primary key on a given table in SQL Server 2000 using SQL. I'm querying the sysobjects table to find a given table, and then querying the sysindexes table. I've ALMOST found what I'm looking for. I see the indexes and columns etc. on the tables in the database, I just don't see the field that indicates that the index is the primary key.
Can anyone help?
Thanks, Alex
The Dropped Table Does Not Have A Primary Key And Cannot Be Used
Feb 25, 2004I'm trying to drop a table onto the design view in Web Matrix and the following message appears: "dropped table does not have a primary key and cannot be used".
I'm using a SQL 2000 database that was previously an MSDE 2000 database. Is there anyway that I can define a column as a primary key?
Thanks.
How To Get Primary Key (Columns) Of A Table?
Jan 5, 2006I want to get the Primary Key Columns in Arrays by sending a tablename. I am using SQL Server 2000 and I want to make a find utility in VB.net whichwill work for all the forms; I have tables with one Primary key and some tables with composite Primary keys. I used to do this in VB 6 by making a function which fills the Primary Keys inList Box (I require to fill in list box), now I need to get in array. Can some one tell me the migration of the following VB 6 Code? This was written for the MS Access, I need same for SQL Server, I cannot find Table Def and Index Object in VB.net 2003. Public Sub GetFieldsFromDatabase (ldbDatabase As Database, lsTableName AsString) Dim lttabDef As TableDef Dim liCounter As Integer Dim liLoop As Integer Dim idxLoop As Index Dim fldLoop As Field
With ldbDatabase For Each lttabDef In .TableDefs If lttabDef.Name = lsTableName Then liCounter = lttabDef.Fields.Count For liLoop = 0 To liCounter - 1 cboFieldLists.List(liLoop) = lttabDef.Fields(liLoop).Name Next liLoop For Each idxLoop In lttabDef.Indexes With idxLoop lblIndexName = .Name If .Primary Then liCounter = 0 For Each fldLoop In .Fields cboPrimaryKeys.List(liCounter) = fldLoop.Name liCounter = liCounter + 1 Next fldLoop End If End With Next cboFieldLists.ListIndex = 0 If cboPrimaryKeys.ListCount > 0 Then cboPrimaryKeys.ListIndex = 0 End If Exit For End If Next End WithEnd Sub
Find Primary Key On Table.
Feb 26, 2008I need to find the primary key of a table, in MySQL i used SHOW COLUMNS and looped through them to find which one was primary if any. The MSSQL equivalent is SELECT * FROM INFORMATION_SCHEMA.Columns WHERE TABLE_NAME = 'table_name' apparently. However the result doesnt give me any key information. How can i find out
1. if a primary key exists on a table
2. what column that primary key exists on
MS SQL Table Primary Key Increment
May 8, 2008Hi Guys,
I have designed a simple table named "test" with ID as primary key and Name as a string data. When I delete a row from the table and insert a new row.. then the ID column increments itself by 1..
for eg : if i have 2 rows in my table
1 Karthik
2 you
if I delete the 2nd row and insert your name in the place of 2nd row..
actually my rows shows
1 Karthik
3 yourname
could anybody give me some advices..
Thanks,
Karthik Gopal
One 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 ...
Creating Table With A Primary Key
Jun 29, 2006Hi,
I need to create a new table in our database.
This table is not linked into the existing schema in anyway, so i'm not sure if I need a primary key or not.
either way, coudl anyone tell me how to create a primary key ni the CREATE TABLE statement.
I have tried searching but cannot find the answer.
many thanks,
Matt
Update A Table With Primary Key
May 1, 2007i have 2 tables. Table a and Table b. i need to insert only the new records from Table a to Table B
how do you update table B where the primary key is 4 columns.
solved.!
How To Add Primary Key In Existing Table
Aug 17, 2006i have table fff .it has two fields one is fno int , another is fnamevarchar(20)ffffno fname-------- -----------100 suresh102 rameshhere there is no not null constraint and identity column theni am add primary key constraint fno column pls help me
View 1 Replies View RelatedSearch The Primary Key Given The Table Name
Jul 20, 2005Hi all,How can get the primary key string from the given table name? i knowit should from system tables of "sysobjects, syscolumns, andsysconstraints", but when i execute the statement like that:select a.name from syscolumns a,sysobjects b,sysconstraints cwhere a.id = b.id and b.name ='Agreement' and a.id = c.id and a.colid= c.colid and c.status = 1i can't get the primary key out, what the trick here? bye the sql helpfile,'status' in sysconstraints table:1 = PRIMARY KEY constraint.2 = UNIQUE KEY constraint.what is exact value refers to PRIMARY KEY constraint?thanks,Robert
View 1 Replies View RelatedSelecting Primary Key Value Into Another Table
Apr 11, 2008I have table A with Primarykey column, AId, Identity field.
I have table B with foriegn key column , AId,
I have same number of rows in both tables (over million), but in Table B, column AId is null at present, as it was added later.
Now I need to select all AId values and update them in existing rows.
Any idea, how would my T-SQL look like???
Many Thanks,
SQL To Identify The Primary Key In A Table?
Oct 24, 2007Hi
I have been looking for a way to identify the primary key defined in a
table using a SQL Sentence...how can i do it?
Thanx for your support!!!
Diego Bayona
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
RDA Tracking - No Primary Key On Table
Apr 18, 2007Hello,
Can a table be tracked if it does not have a primary key? I am using rda.Pull method in VS2005 using C#. If not, what are my options? Any help is appreciated.
Thanks.
Change The Primary Key Of A Table
May 12, 2008Hi,
I have a table named "MOTIVE", in this table the primary key is a colum named "MOTIVE_ID". I want to give primary key status to another column named "MOTIVE_CODE" instead. What are the correct statements to drop the primary key from a column and assign it to another.
Thanks for your help.
Set Name Of Primary Key In The CREATE TABLE
Apr 28, 2008I think there has to be a way to do this but I'm not seeing it.
I would like to set the names of my primary keys in the CREATE TABLE statements. I like this for documentation so it's very clear what the PK name is. When the system generates the key names, it always add the number suffix at the end. I would need to do this both when the PK is a single column and when it is multiple columsn (see examples below).
Thanks very much for your assistance.
CREATE TABLE dbo.SecAppRole1 (
app_id INT IDENTITY(1,1),
app_name_field VARCHAR(128) NOT NULL PRIMARY KEY ,
app_role VARCHAR(128) NOT NULL,
app_role_password VARCHAR(50) NOT NULL)
CREATE TABLE dbo.SecUserAppPermission1 (
app_id INT NOT NULL,
windows_user_name VARCHAR(128) NOT NULL,
user_permission CHAR(01) NOT NULL,
PRIMARY KEY CLUSTERED (app_id ASC, windows_user_name ASC))
SQL Server Admin 2014 :: Few Record Loss In Table Primary Key Where Same Records Exists In Foreign Key Table?
Jun 21, 2015Previously same records exists in table having primary key and table having foreign key . we have faced 7 records were lost from primary key table but same record exists in foreign key table.
View 3 Replies View RelatedHow To Insert Into A Table With A Uniqueidentifier As Primary Key?
Jun 28, 2006I would like to insert into a table with a primary key that has a uniqueidentifier. I would like it to go up by one each time I execute this insert statement. It would be used as my ReportId
My VB code is this.
Protected Sub btncreate_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btncreate.Click
'set connection string
Dim errstr As String = ""
Dim conn = New SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|ASPNETDB.MDF;Integrated Security=True;User Instance=True")
'set parameters for SP
Dim cmdcommand = New SqlCommand("sprocInsertNewReport", conn)
cmdcommand.commandtype = CommandType.StoredProcedure
cmdcommand.parameters.add("@UserName", Session("UserName"))
cmdcommand.parameters.add("@Week", vbNull)
cmdcommand.parameters.add("@Date", vbDate)
cmdcommand.parameters.add("@StartTime", vbNull)
cmdcommand.parameters.add("@EndTime", vbNull)
cmdcommand.parameters.add("@HeatTicket", vbNull)
cmdcommand.parameters.add("@Description", vbNull)
cmdcommand.parameters.add("@TakenAs", vbNull)
cmdcommand.parameters.add("@Dinner", vbNull)
cmdcommand.parameters.add("@Hours", vbNull)
cmdcommand.parameters.add("@Rate", vbNull)
cmdcommand.parameters.add("@PayPeriod", vbNull)
cmdcommand.parameters.add("@LastSave", vbNull)
cmdcommand.parameters.add("@Submitted", vbNull)
cmdcommand.parameters.add("@Approved", vbNull)
cmdcommand.parameters.add("@PagerDays", vbNull)
cmdcommand.parameters.add("@ReportEnd", vbNull)
Try
'open connection here
conn.Open()
'Execute stored proc
cmdcommand.ExecuteNonQuery()
Catch ex As Exception
errstr = ""
'An exception occured during processing.
'Print message to log file.
errstr = "Exception: " & ex.Message
Finally
'close the connection immediately
conn.Close()
End Try
If errstr = "" Then
Server.Transfer("TimeSheetEntry.aspx")
End If
My SP looks like this
ALTER PROCEDURE sprocInsertNewReport
@UserName nvarchar(256),
@Week Int,
@Date Datetime,
@StartTime Datetime,
@EndTime DateTime,
@HeatTicket int,
@Description nvarchar(max),
@TakenAs nchar(10),
@Dinner Nchar(10),
@Hours Float,
@Rate Float,
@PayPeriod int,
@LastSave Datetime,
@Submitted Datetime,
@Approved DateTime,
@PagerDays int,
@ReportEnd DateTime
AS
INSERT INTO
ReportDetails
(
rpUserName,
rpWeek,
rpDate,
rpStartTime,
rpEndTime,
rpHeatTicket,
rpTicketDescription,
rpTakenAs,
rpDinnerPremium,
rpHours,
rpRate,
rpPayPeriod,
rpLastSaveDate,
rpSubmittedDate,
rpApprovedDate,
rpPagerDays,
rpReportDueDate
)
VALUES
(
@Username,
@Week,
@Date,
@StartTime,
@EndTime,
@HeatTicket,
@Description,
@TakenAs,
@Dinner,
@Hours,
@Rate,
@PayPeriod,
@LastSave,
@Submitted,
@Approved,
@PagerDays,
@ReportEnd
)
RETURN
Any Ideas?
thx!
INSERT Data Into Table That Maybe Have That Primary Key Already
May 12, 2007Hi, I'm not user to inserting data into databases, usually I just read the data. So I think my problem might be pretty common.I have a table of longitudes, latitudes, city names, and country names. I set the primary key to be the columns longitude and latitude. I have a method that generates the user's location and the mentioned data. So I want to only insert the new data into the database if it is new and unique. currently if the same user goes to my site, it inserts the data fine the first time and then throws and error the second time because it is inserting duplicate primary key information. Do I need to query the database to see if the data record already exists? or is there a way to insert the record only if it is "new"?? Thanks for the help!!
View 2 Replies View Related