INSERT Data From One Table Into Multiple Tables - sql

Question

I'm using SQL Server 2005.
I am migrating data over from a current database (single table) to a new database (normalized - many tables). In the new database, I have a base table (let's call it "BaseTable"), and multiple other tables (let's call them "DependentA", and "DependentB"). Some of the data from the old database will go to BaseTable, and some will go to the other two. BaseTable has a one-to-one relationship with both DependentA and DependentB, using the Id of them as the foreign key.
So here's my question. How should I migrate the data over? Here is a query I've been trying, which is working except for one thing: the foreign keys in BaseTable for the other two are identical, instead or having a different one each.
Begin SQL:
BEGIN TRANSACTION
DECLARE #dep1Id int
DECLARE #dep2Id int
INSERT INTO DependentA (column1, column2)
SELECT c1, c2
FROM OldDatabase.OldTable
SELECT #dep1Id = Scope_Identity()
INSERT INTO DependentB (column3, column4)
SELECT c3, c4
FROM OldDatabase.OldTable
SELECT #dep2Id = Scope_Identity()
INSERT INTO BaseTable (column5, dependentTable1Id, dependentTablr2Id)
SELECT c5, #dep1Id, #dep2Id
FROM OldDatabase.OldTable
COMMIT

Answer 1

The problem is that #dep1Id and #dep1Id are scalar and are retaining the last value only from the two set based inserts.
Since it's a one off you should probably do it as a cursor
DECLARE CURSOR #curs FOR
SELECT c1,c2,c3,c4,c5 FROM OldDatebase
open #curs
fetch next from #curs into
#c1,#c2,#c3,#c4,#c5 --declare these!
while ##fetch_status <> 0
BEGIN
INSERT INTO DependentA (column1, column2) VALUES #c1, #c2
SELECT #dep1Id = Scope_Identity()
INSERT INTO DependentB (column3, column4) VALUES #c3, #c4
SELECT #dep2Id = Scope_Identity()
INSERT INTO BaseTable (column5, department1Id, department2Id) #c5, #dep1Id, #dep2Id
fetch next from #curs into
#c1,#c2,#c3,#c4,#c5
END
close #curs
deallocate #curs
My cursor syntax is probably riddled with errors, but you get the idea.

Answer 2

To avoid a cursor for large data sets, temporarily include the OldTable_id in the new tables.
BEGIN TRANSACTION
INSERT INTO DependentA (OldTable_id, column1, column2)
SELECT ot.id, ot.c1, ot.c2
FROM OldDatabase.OldTable ot
INSERT INTO BaseTable (OldTable_id, column5)
SELECT ot.id, ot.c5
FROM OldDatabase.OldTable ot
UPDATE BaseTable
SET BaseTable.dependentTable1_id = DependentA.id
FROM BaseTable
INNER JOIN DependentA on DependentA.OldTable_id = BaseTable.OldTable_id
COMMIT
Do the same for DependentB table and any other tables being normalized out of the OldTable.
Delete OldTable_id after the data migration.

Answer 3

[enter image description here][1]ZeorOne is the main table from which you want to get data and insert it into zero and one table respectively.
select idzero,namezero,idone,nameone from zeroone
insert into zero
select idzero,namezero from zeroone
insert into one
select idone,nameone from zeroone
or you want to use cursor to insert data with selected columns from Zeroone
into to two tables the query is here
Declare #idzero int
Declare #namezero varchar(50)
Declare #idone int
Declare #nameone varchar(50)
Declare Cur Cursor for
select idzero,namezero,idone,nameone from zeroone
open Cur
fetch Cur into #idzero,#namezero,#idone,#nameone
While ##fetch_status = 0
begin
insert into zero
select #idzero,#namezero
insert into one
select #idone,#nameone
fetch Cur into #idzero,#namezero,#idone,#nameone
end
close Cur
Deallocate Cur

Answer 4

DECLARE #Product_Name varchar(50),#Generic_Name varchar(50),#Category_Name varchar(50),#Manufacture_Name varchar(50),
#UOM_Name varchar(50),#ProductId int,#GenericId int,#CategoryId int,#ManufactureId int,#UOMId int
DECLARE MultiplTable CURSOR FOR
SELECT ProductName,GenericName,CategoryName,ManufacturerName,UOMName from Noor_ProductList
open MultiplTable
fetch next from MultiplTable into
#Product_Name,#Generic_Name,#Category_Name,#Manufacture_Name,#UOM_Name --declare these!
while ##fetch_status = 0
BEGIN
INSERT INTO Noor_GenericMaster(GenericName) VALUES (#Generic_Name)
SELECT #GenericId = Scope_Identity()
INSERT INTO Noor_CategoryMaster(CategoryName) VALUES (#Category_Name)
SELECT #CategoryId = Scope_Identity()
INSERT INTO Noor_ManufaturerMaster(ManufaturerName) VALUES (#Manufacture_Name)
SELECT #ManufactureId = Scope_Identity()
INSERT INTO Noor_UOMMaster(UOMName) VALUES (#UOM_Name)
SELECT #UOMId = Scope_Identity()
INSERT INTO Noor_ProductMaster (ProductName,GenericID,CategoryID,ManufaturerID,UOMID)
values (#Product_Name,#GenericId,#CategoryId,#ManufactureId,#UOMId)
SELECT #ProductId = Scope_Identity()
fetch next from MultiplTable into #Product_Name,#Generic_Name,#Category_Name,#Manufacture_Name,#UOM_Name
END
close MultiplTable
deallocate MultiplTable