There 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 RepliesHi all,
Can anyone suggest me on Adding primary key to a table which has already a primary key.
Thanks,
Jeyam
I 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)
Previously 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 Related
Hi all,
my stored procedure have one table variable (@t_Replenishment_Rpt).I want to create an Index on this table variable.please advise any of them in this loop...
below is my table variable and I need to create 3 indexes on this...
DECLARE @t_Replenishment_Rpt TABLE
(
Item_Nbr varchar(25) NULL,
Item_Desc varchar(255) NULL,
Trx_Date datetime NULL,
Balance int NULL,
Trx_Type char(10) NULL,
Issue_Type char(10) NULL,
Location char(25) NULL,
Min_Stock int NULL,
Order_Qty int NULL,
Unit char(10) NULL,
Issue_Qty int NULL,
Vendor varchar(10) NULL,
WO_Nbr varchar(10) NULL,
Lead_Time int NULL,
PO_Nbr char(10) NULL,
PO_Status char(10) NULL,
Currency char(10) NULL,
Last_Cost money NULL,
Dept_No varchar(20) NULL,
MSDSNbr varchar(10) NULL,
VendorName varchar(50) NULL,
Reviewed varchar(20) NULL
)
I tryed all below senarios...it is giving error...
--Indexing the @t_Replenishment_Rpt table on the column Names Item Number, Vender , Department Number
--EXEC sp_executesql(CREATE UNIQUE CLUSTERED INDEX Replenishment_index ON @t_Replenishment_Rpt (Item_Nbr))
--CREATE UNIQUE CLUSTERED INDEX Idx1 ON @t_Replenishment_Rpt.Item_Nbr
INDEX_COL ( '@t_Replenishment_Rpt' , ind_Replenishment_id , Item_Nbr )
--EXEC sp_executesql('SELECT INDEXPROPERTY('+ '@t_Replenishment_Rpt' + ', ' + 'Item_Nbr' + ',' + 'IsPadIndex' + ')')
--EXEC sp_executesql(SELECT INDEXPROPERTY('@t_Replenishment_Rpt', 'Vendor','IsPadIndex'))
--EXEC sp_executesql(SELECT INDEXPROPERTY('@t_Replenishment_Rpt', 'Dept_No','IsPadIndex'))
Hi i have set up two very simple tables, I want a user to be able to create a basic account ( data stored in User_Profile table with Id set as the Primery Key as Identity) I
want the user to be able to be able to return to their account at a later date
and then post multiple reviews of different bands they have seen at a later date.
I kept the tables in my example very simple so I could get my head
around the concept, but generally, I want to connect the Id (PK) value in
User_Profile table to the User_Id filed in the User_Review table,
so every review that user writes, will be connected directly to their Id.
Any help you could give would be fantastic a i have no idea where to start!!!
User_Profile
Id int, ( as primary Identity Key)
Name
City
Country
I have a second table called User Reviews
User_Revews
Revew_Id int , ( as primary Identity Key)
User_Id int, ( I want this to contain the Id value in
the User profile Table)
Review_Details
Thanks
Odxsigma
mahesh writes "HI,
I am new to sql server.
can anybody help me
I have a table named tblqualificationmaster.
can i know the foreignkeys and the table related to this
tblqualificationmaster having foeign keys using stored procedure."
Hi,
I have a Users table that I use for membership. I am using username varchar(30) as the primary key for this table since username will always be unique.
The question I have is regarding how SQL Server actually stores data:
I see that when I add users, they are always stored alphabetically sorted on username.
I was expecting that all users will appear on the users table in the order they were added.
Example: I have 3 users (john, jonah, wilson). Now I added 4 user with username='bob'
If I execute select * from users, it returns me (bob, john, jonah, wilson). Look bob has become the first row of the table.
My question: Is Sql server moving 3 older rows to make room for 'bob' and it is also rebuilding part of the index due this new username 'bob'?
If this is the case, then it will have big impact if I have 100K users and I add one user that becomes firstrow. In that case 99,999 rows will have to move.
Bottom line, insert, delete will be very expensive.
I know sql server keeps data physically sorted on PK. But I am concerned here since rows are losing the order in which they were inserted.
Thanks
I 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 RelatedHi 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.
I'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
I'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.
I 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
I 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
Hi 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
I 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 ...
Hi,
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
i 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.!
i 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 RelatedHi 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 RelatedI 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,
Hi
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
hi 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
Hello,
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.
Hi,
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.
I 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))
Ok, I'm really new at this, but I am looking for a way to automatically insert new records into tables. I have one primary table with a primary key id that is automatically generated on insert and 3 other tables that have foreign keys pointing to the primary key. Is there a way to automatically create new records in the foreign tables that will have the new id? Would this be a job for a trigger, stored procedure? I admit I haven't studied up on those yet--I am learning things as I need them. Thanks.
View 4 Replies View RelatedI 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!
Hi, 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 RelatedThis question may be a little complicated.
I am building a DTS Package that is moving data from our webstore (written in house) to a Warehouse Management System(WMS - Turnkey) and I've encountered a problem. both pieces of software have an orders table and an Ordered_Items table, related by the order_ID (makes sense so far). Here is the problem. The primary key on the webstore's Ordered_Items table is a single column (basically an Identity variable), while the primary key on the WMS's Ordered_Items table is a dual column primary key, between the Order_ID and the Order_LineID, so the data should be stored like:
OrderID Order_LineID
1 1
2 1
2 2
2 3
3 1
3 2
4 1
Get the Idea? So I have to create this new Order_LineID column. How can I accomplish this with a SQL statement?
Thanks!!!!!
Hi All,
I want to know what will be the impact of changing the primarykey on a table which already has a lot of data.
For example, column A is unique, primary key. I want to make column B as unique, primary key.
Can I do that? What will be the impact on database performance?
Thanks
Sri
Is it possible? And if yes what's the correct syntax?
I tried both
Declare @expired TABLE (
JdtID Int PRIMARY KEY,
SiteID Int PRIMARY KEY,
PackageId Int,
PackageControlsExpiration Bit,
IsSlot Bit,
MembershipPoints SmallInt,
SupportsAutopost Bit
);
and
Declare @expired TABLE (
JdtID Int,
SiteID Int,
PackageId Int,
PackageControlsExpiration Bit,
IsSlot Bit,
MembershipPoints SmallInt,
SupportsAutopost Bit,
CONSTRAINT Expired_PK PRIMARY KEY (JdtId, SiteId)
);
and neither works.
Thanks, Jenda
I want to create a table with a union. Which I have already accomplished. I want to specify the Primary Key in the statement.
Or would I have to use another statement. How would I do that? With an update and what would the syntax be?
Thanks before hand,
itarin