A Stored Procedure for multiple tables

Question

I want to write a stored procedure for my Tables that have a similar format

for example

tbl#Students(id int,name nvarchar(100))
tbl#Teachers(id int,name nvarchar(100))

This code is not correct but discuss my purpose

declare @b nvarchar(100)
set @b='TBL#Students'
declare @a nvarchar(100)
set @a= 'select * from '+@b
exec @a
//Error : Could not find stored procedure 'select * from TBL#Motamem'.

What is the correct code?

Answer 1

Try this:

exec(@a);

If the parentheses are omitted, sql-server will consider @a as a stored procedure.

Answer 2

Add parenthesis after exec:

declare @b nvarchar(100) 
set @b='alerts' 
declare @a nvarchar(100) 
set @a= 'select * from '+@b 
exec (@a )

Answer 3

先前答案的替代方法是：

Exec sp_executesql @a