SQL Server 中创建的表变量在哪里？

Question

I would like to know where is the table variable created in a computer?

Let's say I declare a table variable as @emp in SQL server, can someone please help to understand where is a table variable created?

Answer 1

table variables are created within tempdb. refer https://docs.microsoft.com/en-us/sql/relational-databases/databases/tempdb-database?view=sql-server-2017

tempdb is stored on disk, and you can check for the file location by right clicking on

[yourserver] > Databases > System Databases > tempdb

In the properties window, you can find the physical file location in the Files tab.

Answer 2

Table variables are alternatives of temporary tables which store a set of records.

Table variable (@emp) is created in the memory. Whereas, a Temporary table (#temp) is created in the t empdb database . Note:- if there is a memory pressure the pages belonging to a table variable may be pushed to tempdb .

The syntax of a table variable is shown below:

Declare @emp Table
(
            [EmpID] [int] NULL,
            [EmpName] [varchar](30) NULL,
)

Inserting a value into the table variable :

Declare @emp Table
(
            [EmpID] [int] NULL,
            [EmpName] [varchar](30) NULL,

)

INSERT INTO @emp (EmpID, EmpName) values (1, 'Rohatash')

Select * from @emp