I have a XML block which I want to insert into database. database contains 3 tables namely itemMapping, links and category. Links table will have only link from XML, category table will have category from XML.
<item>
<link>http://google.com</link>
<category>search engine</category>
<category>android</category>
<category>gmail</category>
</item>
Here come my confusion, 'itemMaping' table contains following columns :
ID, LinkID, CategoryID
In itemMapping table I have to insert linkID and categoryID of newly inserted rows. So according to sample XML itemMapping table will have 3 records for each category, but to insert record in this table i will need linkID and categoryID from above. How I can achieve this? I want to do this in single SP if possible.
Hi Consider the following tables:
Country Table
CountryID CountryName LastEditUser
Province table
ProvinceID ProvinceName CountryID LastEditUser
Consider CountryID and ProvinceID were identity columns.
IN SQL YOU can insert records to these two tables using a single stored procedure take a look at the quick example
CREATE PROCEDURE InsertProvince
(
#ProvinceName VARCHAR(128),
#CountryName VARCHAR(128),
#LastEditUser VARCHAR(128)
)
AS
DECLARE #CountryID INT
INSERT INTO Country
(CountryName, LastEditUser)
VALUES
(#CountryName, #LastEditUser)
#CountryID = SCOPE_IDENTITY();
INSERT INTO Province
(ProvinceName, CountryID, LastEditUser)
VALUES
(#ProvinceName, #CountryID, #LastEditUser)
END
SQL Server has a function called scope_identity, it returns the last identity value inserted into an identity column in the same scope. A scope is a module: a stored procedure, trigger, function, or batch. Therefore, two statements are in the same scope if they are in the same stored procedure, function, or batch.
Insert into Links and capture the LinkID with scope_identity() to a variable. Insert into Category and capture the generated ID's in a table variable. Use that table variable as source for the insert to ItemMapping.
Assuming your tables look like this.
create table Category
(
CategoryID int identity primary key,
Name varchar(50)
)
create table Links
(
LinkID int primary key identity,
Link varchar(50)
)
create table ItemMapping
(
LinkID int references Links(LinkID),
CategoryID int references Category(CategoryID),
primary key(LinkID, CategoryID)
)
You can do like this using an XML variable #XML.
declare #IDs table(ID int)
declare #LinkID int
insert into Links(Link)
select T.X.value('.', 'nvarchar(50)')
from #XML.nodes('item/link') as T(X)
set #LinkID = scope_identity()
insert into Category(Name)
output inserted.CategoryID into #IDs
select T.X.value('.', 'nvarchar(50)')
from #XML.nodes('item/category') as T(X)
insert into ItemMapping(LinkID, CategoryID)
select #LinkID, I.ID
from #IDs as I
SE-Data
Related
:)
I have this defined type:
CREATE TYPE dbo.MyType
AS TABLE
(
name varchar(255),
value varchar(255)
);
Having this stored procedure:
CREATE PROCEDURE MyProcedure #docName varchar(255), #docPath varchar(255), #values AS [dbo].MyType Readonly
AS
declare #ID table (ID int)
INSERT INTO MyTable output inserted.fileID into #ID values (#docName,#docPath)
-- insert loop here
GO;
And the following "one to many" table
CREATE TABLE TableN (
fileID int PRIMARY KEY,
name varchar(255),
value varchar(255)
)
How can I, where it is noted in the above code, make a loop in order to for each record in the MyType table, to insert it into TableN, together with the fileID from the insert?
Thanks!
There's no need for a loop (you need to stop thinking programmatically in SQL and think in datasets). Just do an INSERT:
INSERT INTO TableN (FileID,[name],[value])
SELECT ID.ID,
V.[Name],
V.[value]
FROM #values v
CROSS JOIN #ID ID;
I am generating a series of Inserts based on data from an Excel file into SQL Server 2014
How do I get the value of the ID of the first INSERT to put into the second
Simplified example where Ontario is a Province of Canada:
Insert into country (Name) values('canada');
Insert into provinces (CountryId, Name) values (???,'ontario');
There are 100 inserts so performance is not an issue.
declare #countryid int
Insert into country (Name) values('canada');
SELECT #countryid = SCOPE_IDENTITY()
Insert into provinces (CountryId, Name) values (#countryid,'ontario');
the answer above from tshoemake shows how you can insert one record and get the result. If you want to insert many records in Country and then many records in provinces, you might want to have a look at the OUTPUT clause. You'll have to work out how to join in your list of provinces because this code will just add Ontario to every country:
create table __country
(
id int identity(1,1) primary key,
Name varchar(5000)
)
CREATE TABLE __Provinces (
countryid int,
name varchar(5000)
)
CREATE TABLE #tempIDs
(
id int
)
INSERT INTO __Country
OUTPUT inserted.id
INTO #tempIDs
values ('canada'), values('USA')
insert into __Provinces
select #tempIDs.id, 'ontario'
from #tempIDs
join __country
ON __country.id = #tempIDs.id
select * from __Provinces
I have 2 tables.
create table Sales
(CustomerKey int
,ProductKey int
,CustomersProductsKey int
,SalesAmount decimal(19,4))
Create Table CustomersProducts
(CustomersProductsKey int IDENTITY(1,1),
CustomerKey int,
ProductKey int,
Attribute1 int,
Attribute2 varchar(max))
Currently when I add data to the sales table, I need to insert any new customerkey productkey combinations into the CustomersProducts table and then update the sales table with the resulting CustomersProductsKey identity value. This works.
Is there anyway that I can do this in one step? I don't know if a Merge can do an insert and update on the same if not matched step.
I also could be just looking at this the wrong way as well.
Thanks,
EDIT:
As you can imagine, the fact that I need to use a surrogate key is part of the design. It's needed for a BO report. Otherwise there would really be no need for CustomersProductsKey at all.
If add only one step to make it work,
I think we need create a another table and create trigger on the new table and CustomersProducts
create table CustomersSalesProducts
(CustomerKey int
,ProductKey int
,SalesAmount decimal(19,4)
,Attribute1 int
,Attribute2 varchar(max))
create trigger test1 on CustomersSalesProducts After Insert
as
begin
insert Sales select CustomerKey , ProductKey , 0, SalesAmount from inserted
insert CustomersProducts select CustomerKey , ProductKey , Attribute1, Attribute2 from inserted
end
go
create trigger test2 on CustomersProducts after insert
as
begin
Update Sales set CustomersProductsKey = inserted.CustomersProductsKey
from inserted , Sales
where inserted.CustomerKey = Sales.CustomerKey
and inserted.ProductKey = Sales.ProductKey
end
go
Test Script：
insert CustomersSalesProducts select 3,3,300,3,'Attribute2'
I'm writing a SQL script to generate test data for our database. I'm generating the data in table variables (so I can track it later) and then inserting it into the real tables. The problem is, I need to track which rows I've added to the parent table, so that I can generate its child data later on in the script. For example:
CREATE TABLE Customer (
CustomerId INT IDENTITY,
Name VARCHAR(50)
)
CREATE TABLE Order (
OrderId INT IDENTITY,
CustomerId INT,
Product VARCHAR(50)
)
So, in my script, I create equivalent table variables:
DECLARE #Customer TABLE (
CustomerId INT IDENTITY,
Name VARCHAR(50)
) -- populate customers
DECLARE #Order TABLE (
OrderId INT IDENTITY,
CustomerId INT,
Product VARCHAR(50)
) -- populate orders
And I generate and insert sample data into each table variable.
Now, when I go to insert customers from my table variable into the real table, the CustomerId column in the table variable will become meaningless, as the real table has its own identity seed for its CustomerId column.
Is there a way I can track the new identity of each row inserted into the real table, in my table variable, so I can use a proper CustomerId for the order records? Or, is there a better way I should be going about this?
(Note: I originally started with an application to generate the test data, but it ran too slow during insert as > 1,000,000 records need to be generated.)
WHy do you need identity values on the table variables? If you use just int, you can isnert the ids after the insert is done. Grab them using the output clause. YOu might need an input values and an output values table varaiable to get this just right like this:
DECLARE #CustomerInputs TABLE (Name VARCHAR(50) )
DECLARE #CustomerOutputs TABLE (CustomerId INT ,Name VARCHAR(50) )
INSERT INTO CUSTOMERS (name)
OUTPUT inserted.Customerid, inserted.Name INTO #CustomerOutputs
SELECT Name FROM #CustomerInputs
SELECT * from #CustomerOutputs
You can insert the data to the table with a cursor and use the built-in function SCOPE_IDENTITY() to get the last id which was inserted in the current scope (by your script).
See this MSDN article for more information on SCOPE_IDENTITY.
Here is one way of doing it. If you can use it depends on your situation. You should not do it in production environment when users use your db.
-- Get the next identity values for Customer and Order
declare #NextCustomerID int
declare #NextOrderID int
set #NextCustomerID = IDENT_CURRENT('Customer')+1
set #NextOrderID = IDENT_CURRENT('Order')+1
-- Create tmp tables
create table #Customer (CustomerID int identity, Name varchar(50))
create table #Order (OrderID int identity, CustomerID int, Product varchar(50))
-- Reseed the identity columns in temp tables
dbcc checkident(#Customer, reseed, #NextCustomerID)
dbcc checkident(#Order, reseed, #NextOrderID)
-- Populate #Customer
-- Populate #Order
-- Allow insert to identity column on Customer
set identity_insert Customer on
-- Add rows to Customer
insert into Customer(CustomerId, Name)
select CustomerID, Name
from #Customer
-- Restore identity functionality on Customer
set identity_insert Customer off
-- Add rows to Order
set identity_insert [Order] on
insert into [Order](OrderID, CustomerID, Product)
select OrderID, CustomerID, Product
from #Order
set identity_insert [Order] off
-- Drop temp tables
drop table #Customer
drop table #Order
-- Check result
select * from [Order]
select * from Customer
The way I'd do it its first obtain the MAX(CustomerId) from your Customer Table. Then I'd get rid of the IDENTITY column on your variable table and do my own CustomerId using ROW_NUMBER() and the MaxCustomerId. It should be something like this:
DECLARE #MaxCustomerId INT
SELECT #MaxCustomerId = ISNULL(MAX(CustomerId),0)
FROM Customer
DECLARE #Customer TABLE (
CustomerId INT,
Name VARCHAR(50)
)
INSERT INTO #Customer(CustomerId, Name)
SELECT #MaxCustomerId + ROW_NUMBER() OVER(ORDER BY SomeColumn), Name
FROM YourDataTable
Or insert the values on a temp table, so you can use the same ids to fill your Order table.
Let us say I have a table (everything is very much simplified):
create table OriginalData (
ItemName NVARCHAR(255) not null
)
And I would like to insert its data (set based!) into two tables which model inheritance
create table Statements (
Id int IDENTITY NOT NULL,
ProposalDateTime DATETIME null
)
create table Items (
StatementFk INT not null,
ItemName NVARCHAR(255) null,
primary key (StatementFk)
)
Statements is the parent table and Items is the child table. I have no problem doing this with one row which involves the use of IDENT_CURRENT but I have no idea how to do this set based (i.e. enter several rows into both tables).
Thanks.
Best wishes,
Christian
Another possible method that would prevent the use of cursors, which is generally not a best practice for SQL, is listed below... It uses the OUTPUT clause to capture the insert results from the one table to be used in the insert to the second table.
Note this example makes one assumption in the fact that I moved your IDENTITY column to the Items table. I believe that would be acceptable, atleast based on your original table layout, since the primary key of that table is the StatementFK column.
Note this example code was tested via SQL 2005...
IF OBJECT_ID('tempdb..#OriginalData') IS NOT NULL
DROP TABLE #OriginalData
IF OBJECT_ID('tempdb..#Statements') IS NOT NULL
DROP TABLE #Statements
IF OBJECT_ID('tempdb..#Items') IS NOT NULL
DROP TABLE #Items
create table #OriginalData
( ItemName NVARCHAR(255) not null )
create table #Statements
( Id int NOT NULL,
ProposalDateTime DATETIME null )
create table #Items
( StatementFk INT IDENTITY not null,
ItemName NVARCHAR(255) null,
primary key (StatementFk) )
INSERT INTO #OriginalData
( ItemName )
SELECT 'Shirt'
UNION ALL SELECT 'Pants'
UNION ALL SELECT 'Socks'
UNION ALL SELECT 'Shoes'
UNION ALL SELECT 'Hat'
DECLARE #myTableVar table
( StatementFk int,
ItemName nvarchar(255) )
INSERT INTO #Items
( ItemName )
OUTPUT INSERTED.StatementFk, INSERTED.ItemName
INTO #myTableVar
SELECT ItemName
FROM #OriginalData
INSERT INTO #Statements
( ID, ProposalDateTime )
SELECT
StatementFK, getdate()
FROM #myTableVar
You will need to write an ETL process to do this. You may want to look into SSIS.
This also can be done with t-sql and possibly temp tables. You may need to store unique key from OriginalTable in Statements table and then when you are inserting Items - join OriginalTable with Statements on that unique key to get the ID.
I don't think you could do it in one chunk but you could certainly do it with a cursor loop
DECLARE #bla char(10)
DECLARE #ID int
DECLARE c1 CURSOR
FOR
SELECT bla
FROM OriginalData
OPEN c1
FETCH NEXT FROM c1
INTO #bla
WHILE ##FETCH_STATUS = 0
BEGIN
INSERT INTO Statements(ProposalDateTime) VALUES('SomeDate')
SET #ID = SCOPE_IDENTITY()
INSERT INTO Items(StateMentFK,ItemNAme) VALUES(#ID,#bla)
FETCH NEXT FROM c1
INTO #bla
END
CLOSE c1
DEALLOCATE c1