How Many Number Of Tables

Nov 23, 2007

Dear All...
is there any limitation that sql server must have these many tablesonly in one database?

and is there any same case with dataset? i faced these in one interview....

i dont know what is dataset and what is the maximum no of tables in a dataset..

please answere me.
thank you very much

Vinod
Even you learn 1%, Learn it with 100% confidence.

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Maximum Number Of Tables - Is 4^15 Big A Number?

Nov 26, 2006

Hello people,I might sound a little bit crazy, but is there any possibility that youcan incorporate 4^15 (1,073,741,824) tables into a SQL Database?I mean, is it possible at all? There might be a question of whereanyone would want so many tables, but i'm a bioinformatics guy and I'mtrying to deal with genomic sequences and was coming up with a newalgorithm, where the only limit is the number of tables I can put intoa Database.So, can you please advise if its possible to put in so many tables intoa SQL database? Or is the Bekerley DB better?

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Maximum Number Of Tables - 4^15 Too Big?

Nov 26, 2006

Hello people,
I might sound a little bit crazy, but is there any possibility that you can incorporate 1,073,741,824 tables into a SQL Database?

I mean, is it possible at all? There might be a question of where anyone would want so many tables, but i'm a bioinformatics guy and I'm trying to deal with genomic sequences and was coming up with a new algorithm, where the only limit is the number of tables I can put into a Database.

So, can you please advise if its possible to put in so many tables into a SQL database? Or is the Bekerley DB better?

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Jan 25, 2008

Hi gurus, I'm creating a web application where I will have a large number of tables (between 10k and 20k), this is done for the sake of scalability as tables will be moved to different database servers as the application grows and also for performance (smaller indexes). I'm worried though how having a large number of tables could affect the performance of SQL Server as the application will start on one single database server. I tried to find some resources on that on the internet but couldn't find any.

I would really appreciate if you can give me some advice and if you have any good links that would be great...

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Jan 25, 2008

Hi gurus, I'm creating a web application where I will have a large number of tables (between 10k and 20k), this is done for the sake of scalability as tables will be moved to different database servers as the application grows and also for performance (smaller indexes). I'm worried though how having a large number of tables could affect the performance of SQL Server as the application will start on one single database server. I tried to find some resources on that on the internet but couldn't find any.

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http://www.waleedeissa.com

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I have 2 tables

tblOpenSiteDates
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Comment: VarChar


tblCloseSiteDates
Site: int
CloseDate: smalldate
Comments: VarChar
newLocationID: int

I am trying to get a view which would display a site with the open and close dates. Null is ok for a close date for those opens that are still open.. not every office has an open date and close date.. it is possible to have just a close date and not an open date (ie unsure of open date but I know its closing)

so the output would be

viewOpenCloseSites
Site: int
opendate: smalldate
closedate: smalldate

PLEASE HELP i just can not figure it out

thanks...

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I have around 50,000,000 rows per day inserted in the table T1. At the end of the day 40,000,000 rows are deleted. I have to keep the records for 12 months and then archive it. Database is 24/7 web serving and there is no down time allowed. IDENTITY column will go out of range (overflow) after less than two years, unless the identity seed is reset to the start value (seed=1, increment=1).
At the end of 12th month data is archived in another table and only last month is kept in the table T1. So table T1 enters new year with data from last month of the previous year. There are few other tables that refer to this table by using there own field with values from T1.IDENTITY column (referential integrity is not enforced). Identity column in T1 is needed as a unique id for some search actions. Performance is an issue therefore bigint data type is used for this identity column rather than decimal.

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Using the bcp that came with MSSQL 2000 didn't work (UTF8 related), so I am now accessing the 2000 database from within MSSQL 2008 R2 Management Studio and use its Import and Export wizard that does make UTF8 exports possible.

But it fails. This is the error I got for one table.

Code:
- Validating (Error)
Messages
Error 0xc00470d4: Data Flow Task 1: The code page on input column "cmsGUID" (74) is 1252 and is required to be 65001. (SQL Server Import and Export Wizard)

Error 0xc00470d4: Data Flow Task 1: The code page on input column "PublicationStatus" (79) is 1252 and is required to be 65001. (SQL Server Import and Export Wizard) ....

What do I have to do?

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[URL] ....

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I have performed the following tasks **

1. Create a new dynamic database. ( I have used Execute SQL Task to do this) 2. Copy all the table structures ( I have used Execute SQL Task to do this)

3. Import Data. This is the main problem. I was trying to create a dynamic connection string with variables as suggested in several forums but I finally came to know that this cannot be done if the table structures are different as the metadata cannot be refreshed at runtime.

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What is the best method to do this? My DBA does not like “Transfer SQL Objects Task” or “transfer Database Task”. I would like to create this as a dynamic process.

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Sep 8, 2006

I have just taken over the job of sorting out a rather poorly designed database. It looks like it was 'upsized' from an access database to the SQL server. The SQL server is the 2000 version.

Now I am trying to generate a report of what the students in the database are owing by referencing the Receipt table and then all the available payment methods and allocations. I was wondering if there was anyway to work out data being displayed twice (Let me demonstrate)

Note1: All the tables are linked by a key of ReceiptNo. From what I can see there is a table for every payment type and allocation but no link between the two other then the receipt number.

Using the query:
SELECT T_Receipt.ReceiptNo, T_cheque.Amount AS Chq_Amount, T_credit.Amount AS Cre_Amount, StandingOrder.Amount AS Stn_Amount,
T_BankTransfer.amount AS Bnk_Amount, T_cash.TotalAmount AS Cas_Amount, T_RentPayment.AmountPayed AS Ren_Paid,
T_AdminPayment.AmountPaid AS Adm_Paid, T_InternetBilling.Total AS Int_Paid, T_Utilities.AmountPaid AS Util_Amount,
T_InvoicePayment.amountPaid AS Inv_Paid, T_OtherPayments.paymentAmount AS Oth_Paid, T_parkingBill.paymentAmount AS Prk_Paid,
T_TelephoneBills.TelephoneCredit AS Tel_Paid, T_DepositPayment.[Deposit payment] AS Dep_Amount, T_Receipt.cancelled AS Canceled,
T_Receipt.RemittanceReceiptNo AS Rec_Ref, T_Receipt.Student
FROM T_Receipt INNER JOIN
T_DepositPayment ON T_Receipt.ReceiptNo = T_DepositPayment.receiptNo LEFT OUTER JOIN
T_RentPayment ON T_Receipt.ReceiptNo = T_RentPayment.RentPaymentNo LEFT OUTER JOIN
StandingOrder ON T_Receipt.ReceiptNo = StandingOrder.ReceiptNo LEFT OUTER JOIN
T_TelephoneBills ON T_Receipt.ReceiptNo = T_TelephoneBills.ReceiptNo LEFT OUTER JOIN
T_parkingBill ON T_Receipt.ReceiptNo = T_parkingBill.ReceiptNo LEFT OUTER JOIN
T_OtherPayments ON T_Receipt.ReceiptNo = T_OtherPayments.ReceiptNo LEFT OUTER JOIN
T_InvoicePayment ON T_Receipt.ReceiptNo = T_InvoicePayment.receiptNo LEFT OUTER JOIN
T_cash ON T_Receipt.ReceiptNo = T_cash.ReceiptNo LEFT OUTER JOIN
T_AdminPayment ON T_Receipt.ReceiptNo = T_AdminPayment.ReceiptNo LEFT OUTER JOIN
T_BankTransfer ON T_Receipt.ReceiptNo = T_BankTransfer.receiptNo LEFT OUTER JOIN
T_Utilities ON T_Receipt.ReceiptNo = T_Utilities.receiptNo LEFT OUTER JOIN
T_credit ON T_Receipt.ReceiptNo = T_credit.ReceiptNo LEFT OUTER JOIN
T_cheque ON T_Receipt.ReceiptNo = T_cheque.ReceiptNo LEFT OUTER JOIN
T_InternetBilling ON T_Receipt.ReceiptNo = T_InternetBilling.ReceiptNo
GROUP BY T_Receipt.Student, T_Receipt.ReceiptNo, T_cheque.Amount, T_credit.Amount, StandingOrder.Amount, T_BankTransfer.amount, T_cash.TotalAmount,
T_AdminPayment.AmountPaid, T_InternetBilling.Total, T_Utilities.AmountPaid, T_InvoicePayment.amountPaid, T_OtherPayments.paymentAmount,
T_parkingBill.paymentAmount, T_TelephoneBills.TelephoneCredit, T_Receipt.cancelled, T_Receipt.RemittanceReceiptNo,
T_DepositPayment.[Deposit payment], T_RentPayment.AmountPayed, T_Receipt.Student
HAVING (T_Receipt.Student LIKE N'06%')

Which gives a result of:




RecNo.
30429
Cheque
250
Deposit
250


30429
679.98
250


This is fine but when I do analysis on this it appears as though the student has paid two deposit payments. I was wondering with out querying each table independently from an application if there was a criteria to specify that I only get one deposit result.
So as such say, give me all the payments but I only want one result from the other tables. I though about discrete but that wouldn't work here.

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Reporting Services Error
--------------------------------------------------------------------------------

The number of requests for "XXXServerXXXUser" has exceeded the maximum number allowed for a single user.
--------------------------------------------------------------------------------
SQL Server Reporting Services


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The system is up for a month but this problem occured today?!? What could be the problem?!?

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[Code] ....

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Feb 5, 2007

From Newbie to Newbie,



Add reference to:

'Microsoft ActiveX Data Objects 2.8 Library

'Microsoft ADO Ext.2.8 for DDL and Security

'Microsoft Jet and Replication Objects 2.6 Library

--------------------------------------------------------

Imports System.IO

Imports System.IO.File





Code Snippet

'BACKUP DATABASE

Public Shared Sub Restart()

End Sub



'You have to have a BackUps folder included into your release!

Private Sub BackUpDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BackUpDB.Click
Dim addtimestamp As String
Dim f As String
Dim z As String
Dim g As String
Dim Dialogbox1 As New Backupinfo


addtimestamp = Format(Now(), "_MMddyy_HHmm")
z = "C:Program FilesVSoftAppMissNewAppDB.mdb"
g = addtimestamp + ".mdb"


'Add timestamp and .mdb endging to NewAppDB
f = "C:Program FilesVSoftAppMissBackUpsNewAppDB" & g & ""



Try

File.Copy(z, f)

Catch ex As System.Exception

System.Windows.Forms.MessageBox.Show(ex.Message)

End Try



MsgBox("Backup completed succesfully.")
If Dialogbox1.ShowDialog = Windows.Forms.DialogResult.OK Then
End If
End Sub






Code Snippet

'RESTORE DATABASE

Private Sub RestoreDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

RestoreDB.Click
Dim Filename As String
Dim Restart1 As New RestoreRestart
Dim overwrite As Boolean
overwrite = True
Dim xi As String


With OpenFileDialog1
.Filter = "Database files (*.mdb)|*.mdb|" & "All files|*.*"
If .ShowDialog() = Windows.Forms.DialogResult.OK Then
Filename = .FileName



'Strips restored database from the timestamp
xi = "C:Program FilesVSoftAppMissNewAppDB.mdb"
File.Copy(Filename, xi, overwrite)
End If
End With


'Notify user
MsgBox("Data restored successfully")


Restart()
If Restart1.ShowDialog = Windows.Forms.DialogResult.OK Then
Application.Restart()
End If
End Sub








Code Snippet

'CREATE NEW DATABASE

Private Sub CreateNewDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

CreateNewDB.Click
Dim L As New DatabaseEraseWarning
Dim Cat As ADOX.Catalog
Cat = New ADOX.Catalog
Dim Restart2 As New NewDBRestart
If File.Exists("C:Program FilesVSoftAppMissNewAppDB.mdb") Then
If L.ShowDialog() = Windows.Forms.DialogResult.Cancel Then
Exit Sub
Else
File.Delete("C:Program FilesVSoftAppMissNewAppDB.mdb")
End If
End If
Cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Program FilesVSoftAppMissNewAppDB.mdb;

Jet OLEDB:Engine Type=5")

Dim Cn As ADODB.Connection
'Dim Cat As ADOX.Catalog
Dim Tablename As ADOX.Table
'Taylor these according to your need - add so many column as you need.
Dim col As ADOX.Column = New ADOX.Column
Dim col1 As ADOX.Column = New ADOX.Column
Dim col2 As ADOX.Column = New ADOX.Column
Dim col3 As ADOX.Column = New ADOX.Column
Dim col4 As ADOX.Column = New ADOX.Column
Dim col5 As ADOX.Column = New ADOX.Column
Dim col6 As ADOX.Column = New ADOX.Column
Dim col7 As ADOX.Column = New ADOX.Column
Dim col8 As ADOX.Column = New ADOX.Column

Cn = New ADODB.Connection
Cat = New ADOX.Catalog
Tablename = New ADOX.Table



'Open the connection
Cn.Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Program FilesVSoftAppMissNewAppDB.mdb;Jet

OLEDB:Engine Type=5")


'Open the Catalog
Cat.ActiveConnection = Cn



'Create the table (you can name it anyway you want)
Tablename.Name = "Table1"


'Taylor according to your need - add so many column as you need. Watch for the DataType!
col.Name = "ID"
col.Type = ADOX.DataTypeEnum.adInteger
col1.Name = "MA"
col1.Type = ADOX.DataTypeEnum.adInteger
col1.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col2.Name = "FName"
col2.Type = ADOX.DataTypeEnum.adVarWChar
col2.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col3.Name = "LName"
col3.Type = ADOX.DataTypeEnum.adVarWChar
col3.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col4.Name = "DOB"
col4.Type = ADOX.DataTypeEnum.adDate
col4.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col5.Name = "Gender"
col5.Type = ADOX.DataTypeEnum.adVarWChar
col5.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col6.Name = "Phone1"
col6.Type = ADOX.DataTypeEnum.adVarWChar
col6.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col7.Name = "Phone2"
col7.Type = ADOX.DataTypeEnum.adVarWChar
col7.Attributes = ADOX.ColumnAttributesEnum.adColNullable
col8.Name = "Notes"
col8.Type = ADOX.DataTypeEnum.adVarWChar
col8.Attributes = ADOX.ColumnAttributesEnum.adColNullable



Tablename.Keys.Append("PrimaryKey", ADOX.KeyTypeEnum.adKeyPrimary, "ID")


'You have to append all your columns you have created above
Tablename.Columns.Append(col)
Tablename.Columns.Append(col1)
Tablename.Columns.Append(col2)
Tablename.Columns.Append(col3)
Tablename.Columns.Append(col4)
Tablename.Columns.Append(col5)
Tablename.Columns.Append(col6)
Tablename.Columns.Append(col7)
Tablename.Columns.Append(col8)



'Append the newly created table to the Tables Collection
Cat.Tables.Append(Tablename)



'User notification )
MsgBox("A new empty database was created successfully")


'clean up objects
Tablename = Nothing
Cat = Nothing
Cn.Close()
Cn = Nothing


'Restart application
If Restart2.ShowDialog() = Windows.Forms.DialogResult.OK Then
Application.Restart()
End If

End Sub








Code Snippet



'COMPACT DATABASE

Private Sub CompactDB_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

CompactDB.Click
Dim JRO As JRO.JetEngine
JRO = New JRO.JetEngine


'The first source is the original, the second is the compacted database under an other name.
JRO.CompactDatabase("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Program

FilesVSoftAppMissNewAppDB.mdb; Jet OLEDB:Engine Type=5", "Provider=Microsoft.Jet.OLEDB.4.0;

Data Source=C:Program FilesVSoftAppMissNewAppDBComp.mdb; JetOLEDB:Engine Type=5")


'Original (not compacted database is deleted)
File.Delete("C:Program FilesVSoftAppMissNewAppDB.mdb")


'Compacted database is renamed to the original databas's neme.
Rename("C:Program FilesVSoftAppMissNewAppDBComp.mdb", "C:Program FilesVSoftAppMissNewAppDB.mdb")


'User notification
MsgBox("The database was compacted successfully")

End Sub

End Class

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