Table valued parameters in SQL Server
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- Опубликовано: 8 сен 2024
- table valued parameters example
send table variable to stored procedure
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In this video we will discuss table valued parameters in SQL Server.
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Table Valued Parameter is a new feature introduced in SQL SERVER 2008. Table Valued Parameter allows a table (i.e multiple rows of data) to be passed as a parameter to a stored procedure from T-SQL code or from an application. Prior to SQL SERVER 2008, it is not possible to pass a table variable as a parameter to a stored procedure.
Let us understand how to pass multiple rows to a stored procedure using Table Valued Parameter with an example. We want to insert multiple rows into the following Employees table.
SQL Script to create the Employees table
Create Table Employees
(
Id int primary key,
Name nvarchar(50),
Gender nvarchar(10)
)
Go
Step 1 : Create User-defined Table Type
CREATE TYPE EmpTableType AS TABLE
(
Id INT PRIMARY KEY,
Name NVARCHAR(50),
Gender NVARCHAR(10)
)
Go
Step 2 : Use the User-defined Table Type as a parameter in the stored procedure. Table valued parameters must be passed as read-only to stored procedures, functions etc. This means you cannot perform DML operations like INSERT, UPDATE or DELETE on a table-valued parameter in the body of a function, stored procedure etc.
CREATE PROCEDURE spInsertEmployees
@EmpTableType EmpTableType READONLY
AS
BEGIN
INSERT INTO Employees
SELECT * FROM @EmpTableType
END
Step 3 : Declare a table variable, insert the data and then pass the table variable as a parameter to the stored procedure.
DECLARE @EmployeeTableType EmpTableType
INSERT INTO @EmployeeTableType VALUES (1, 'Mark', 'Male')
INSERT INTO @EmployeeTableType VALUES (2, 'Mary', 'Female')
INSERT INTO @EmployeeTableType VALUES (3, 'John', 'Male')
INSERT INTO @EmployeeTableType VALUES (4, 'Sara', 'Female')
INSERT INTO @EmployeeTableType VALUES (5, 'Rob', 'Male')
EXECUTE spInsertEmployees @EmployeeTableType
That's it. Now select the data from Employees table and notice that all the rows of the table variable are inserted into the Employees table.
In our next video, we will discuss how to pass table as a parameter to the stored procedure from an ADO.NET application
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Thanks for sharing! Very well organized and right to the point. Really appreciate your effort!
Thank you for this video! great tutorial. I'm the biggest fan of your tutorials. God bless you and keep goin'.
Very helpful video.
Thank you.
Thank you for your time and effort bro! We are learning!
Thank you!
thank you! this is great!
Nice tutorial.Go Ahead.
Great tutorial. And I have to do this - first! :D
Sir.... Pls post videos on 3-Tier Architecture
Hi sir,
i just found this tutorial and thanks for it.
I have a question regarding the data type :
if there are more than 1 execute the same SP ( spInsertEmployees ) at the same time what will happen to EmpTableType ?
for exmaple :
the first one ( like example) inserts 5 rows
the second one Inserts 3 rows
will the EmpTableType have 8 rows?
or EmpTableType has 5 and 3 for each transaction ?
Sory for bad english, i hope you undertand what i mean :)
Thanks,
Ronald
Please I have a question and I would so much love the get a response from you.
Please when passing the datatable parameter to sql procedure, is it possible to check for errors just like you did in part 56 and 57 videos?
For example, you checked if the quantity sold is not greater than quantity available. Is that also possible with datatable parameter?
thanks a lot
For me, after creating UDTT, I had to restart SSMS to be able to use it in the sp
Nice
Sir please post video on joint hints(Hash, Loop, Merge)
Hi, can you please explain how we can alter a user defined table type? thnx :)
Hi,
thank you for this nice tutorial.
Is it possiblet to use similar approach to pass list of records from excel into the store procedure?
Please add some videos regarding sql jobs
i need a help plz help me
suppose i have 10 database in my table for example source to destination i wont one at a time when'll search suppose any one by 10
how can its posible
While executing Stored Proc, I am getting below error message, can any please help??
Msg 137, Level 15, State 2, Line 39
Must declare the scalar variable "@EmployeeTableType".
add step 2
@EmployeeTableType"
what is real time use of table variable
If I insert new values into the table type and execute the sp for a second time, will it re-insert the values from the first execution?
Saleem Khan yes of course
Hi, i have one query, if suppose i want to insert 10 records and 9th record has some issue(like passing int type data instead of string) so this store procedure will not save all 10 records, how can we overcome this problem? plz help
You are declaring a table variable and passing values into that table variable. This variable is passed as a parameter to the stored procedure. So the 9th record which has error will not be stored in your declared variable. Since the variable is incomplete it is not passed into the stored procedure and it won't be executed.
Should have included a real world use case
this is table valued parameter in stored procedure
what about table valued parameter in functions
Why don't we simply insert data into the table directly? What's the gain?
If you have multiple records, that means you have to insert one after the other using loop function from your app. It won't be fine if the network is so slow