Delete Rows From One Table Using Rows From Another Table

Jul 23, 2005

Using the the NumId from TitleData, I would like to delete the
corresponding row in Bookdata using pure SQL. I want it to delete all
rows in bookdata where the Titledata.NumID is a match to bookdata.id
The two tables are linked in that the NumId of table Titledata is
identical to the Id of table bookdata. I can, using ADO, loop thru
deleting one by one but I would like to do this in a pure SQL
statement. Is this possible? Any help is appreciated.

I was thinking something like this way :

"Delete from Bookdata where Titledata.NumID = Bookdata.id"


But of course it will error.

My current code is:
(frmlogon.tablename is really Titledata)

Dim rstry As New ADODB.Recordset
Dim values As Variant
SQLQuery = "Select Numid from " & frmLogon.Tablename
Set rstry = frmLogon.cnConnection.Execute(SQLQuery)
values = rstry.GetRows
Set rstry = Nothing
'now loop thru
Dim xx As Integer
xx = 0
Do Until xx > UBound(values, 2)
SQLQuery = "Delete from Bookdata where bookdata.Id = '" & values(0,
xx) & "'"
frmLogon.cnConnection.Execute (SQLQuery)
xx = xx + 1
Loop


'create statements for 2 tables involved are

conn.Execute "CREATE TABLE TitleData" & _
"(Id INT IDENTITY (1, 1) NOT NULL PRIMARY KEY," & _
"NumId INT DEFAULT 0 )"

conn.Execute "CREATE TABLE BookData" & _
"(Id INT IDENTITY (1, 1) NOT NULL," & _
"Titles TEXT DEFAULT ''," & _
"GeneralNote TEXT DEFAULT ''," & _
"Author VARCHAR(100) DEFAULT ''," & _
"Imprint VARCHAR(100) DEFAULT ''," & _
"ISBN VARCHAR(100) DEFAULT ''," & _
"Description VARCHAR(100) DEFAULT ''," & _
"CallNumberPre VARCHAR(5) DEFAULT ''," & _
"CallNumber VARCHAR(25) DEFAULT '',LOCNumber VARCHAR(30) DEFAULT '',"
& _
"Accession VARCHAR(25) DEFAULT ''," & _
"Bibliography VARCHAR(100) DEFAULT ''," & _
"Series VARCHAR(100) DEFAULT ''," & _
"MyStatus VARCHAR(70) DEFAULT ''," & _
"Barcode VARCHAR(50) DEFAULT ''," & _
"LocalData VARCHAR(100) DEFAULT ''," & _
"CheckoutPeriod VARCHAR(10) DEFAULT ''," & _
"CatalogCard TEXT DEFAULT ''," & _
"Summary TEXT DEFAULT ''," & _
"MyCount VARCHAR(10) DEFAULT ''," & _
"ItemDate DATETIME DEFAULT ''," & _
"MyUser VARCHAR(50) DEFAULT ''," & _
"MarcData TEXT DEFAULT ''," & _
"SdlsRecord TEXT DEFAULT '', LOSC VARCHAR(5) DEFAULT '', LOSN
Decimal(14,6) DEFAULT 0," & _
"Edits Char(1) DEFAULT '', TitleDuplicate VARCHAR(50) DEFAULT '')"

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