How To Delete Data From All The Tables?

Apr 7, 2008

I want to reset my application and delete all the data in all tables.

But I have question for this.

1. I do not know how to loop over all the tables and delete data.
2. the database have database diagram so threre are dependency with tables so the delete order is hard to decide.

Please give me a idea.

Thanks

Mark

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Insert, Update && Delete On Two Tables With Same Data Structure...

Jun 30, 2006

I have created two table with same data structure. I need realtime effects (i.e. data) on both tables - Table1 & Table2.

Following Points to Consider.

1. Both tables are in the same database.

2. Table1 is using for data entry & I wants the same data in the Table2.

3. If any row insert, update & delete occers on Table1, the same effect should be done on Table2.

4. I need real time data insert, update & delete on Table2.

I knew that using triggers it could be possible, I have successfully created a trigger for inserting new rows (using logical table "Inserted") in Table2 but not succeed for update & delete yet.

I want to understand how can I impletement this successfully without any ambiguity.

I have attached data structure for tables. Thanx...

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Mar 18, 2008

This a microsoft SQL 2000 server.
I have a DB with mutliple tables that have a column called "Date_stamp", which is used as a primary ID.
Here is my problem:
Some of tables have a bad datetime entry for the "Date_stamp". The bad entry is '2008-3-18". I need to delete this entry from every single table that has a name similary to 'Elect_Sub%Daily'.

I know how to get the user table names from the DB as follows:

SELECT name
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What I need to do is have a query that will basically scroll through the tables name produced by the above query and search and delete the entries that read '2008-3-18".

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Nov 26, 2007

this is my Delete Query NO 1
alter table ZT_Master disable trigger All
Delete ZT_Master WHERE TDateTime> = DATEADD(month,DATEDIFF(month,0,getdate())-(select Keepmonths from ZT_KeepMonths where id =1),0) AND TDateTime< DATEADD(month,DATEDIFF(month,0,getdate()),0)
alter table ZT_Master enable trigger All
 
I have troble in Delete Query No 2
here is a select statemnt , I need to delete them
select d.* from ZT_Master m, ZT_Detail d where (m.Prikey=d.MasterKey)  And m.TDateTime> = DATEADD(month,DATEDIFF(month,0,getdate())-(select Keepmonths from ZT_KeepMonths where id =1),0) AND m.TDateTime< DATEADD(month,DATEDIFF(month,0,getdate()),0)
I tried modified it as below
delete d.* from ZT_Master m, ZT_Detail d where (m.Prikey=d.MasterKey)  And m.TDateTime> = DATEADD(month,DATEDIFF(month,0,getdate())-(select Keepmonths from ZT_KeepMonths where id =1),0) AND m.TDateTime< DATEADD(month,DATEDIFF(month,0,getdate()),0)
but this doesn't works..
 
can you please help?
and can I combine these 2 SQL Query into one Sql Query? thank you

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Solution!-Create Access/Jet DB, Tables, Delete Tables, Compact Database

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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TryDim deleteSQL As String = _
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--------------------------------------------------
Events
--------------------------------------------------
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--------------------------------------------------
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