Using Variables in SQL Queries for Scripts and SQLServer Stored Procedures | Essential SQL
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If you want to make your queries more flexible, then watch this video to learn how you can add variables to your SQL Server scripts and stored procedures.
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Here are the scripts for those interested:
--Simple Select
select *
from Person.Person
Where LastName like 'Ral%'
--Select with variable in Query
declare @LastNamePattern as varchar(40);
set @LastNamePattern = 'Ral%'
select *
from Person.Person
Where LastName like @LastNamePattern
--Make it a stored procedure and run it!
alter procedure PersonSearchLastName(@LastNamePattern as varchar(20))
AS
begin
select *
from Person.Person
Where LastName like @LastNamePattern
end
exec dbo.PersonSearchLastName 'Kal%'