make a variable default if something on sql server insert stament - sql

Question

i want to insert the default values, if the values i gave him are 0 or ''
ALTER procedure [dbo].[altaemp]
#id_emp int,
#nom_emp varchar(100),
#lnom_emp varchar(100),
#l2nom_emp varchar(100),
#id_type int,
#id_supervisor int,
#correo varchar(50),
#id_area int
as
begin
if #id_supervisor = 0 (select #id_supervisor = ?? )
if #correo = '' (select #correo = ??)
INSERT INTO [dbo].[empleados]
([id_emp]
,[nom_emp]
,[lnom_emp]
,[l2nom_emp]
,[id_type]
,[id_supervisor]
,[correo]
,[id_area])
VALUES
(#id_emp,
#nom_emp,
#lnom_emp,
#l2nom_emp,
#id_type,
#id_supervisor,
#correo,
#id_area)
return
end
i have tried equals the variables to null or default without success

Answer 1

To handle these 2 cases you can add the following decision statements, replacing ?? with your replacement value:
IF LEN(#correo) = 0 SET #correo = ??
IF #id_supervisor = 0 SET #id_supervisor = ??

Answer 2

I like to use a COALESCE with a NULLIF inside it to achieve this.
SELECT #id_supervisor = COALESCE(NULLIF(#id_supervisor,0),[DEFAULT VALUE])
,#correo = COALESCE(NULLIF(#correo ,' '),[DEFAULT VALUE])

Answer 3

There are multiple options for handling this scenario. If they are truly default values, you can simply pass null into the stored procedure and define the procedure like this:
ALTER procedure [dbo].[altaemp]
#id_emp int,
#nom_emp varchar(100),
#lnom_emp varchar(100),
#l2nom_emp varchar(100),
#id_type int,
#id_supervisor int = <default supervisor id>,
#correo varchar(50) = <default correo>,
#id_area int
as
begin
INSERT INTO [dbo].[empleados]
([id_emp]
,[nom_emp]
,[lnom_emp]
,[l2nom_emp]
,[id_type]
,[id_supervisor]
,[correo]
,[id_area])
VALUES
(#id_emp,
#nom_emp,
#lnom_emp,
#l2nom_emp,
#id_type,
#id_supervisor,
#correo,
#id_area)
return
end
Alternatively, if there is a decision that has to be made, you can replace your logic with case logic which would look similar to this:
ALTER procedure [dbo].[altaemp]
#id_emp int,
#nom_emp varchar(100),
#lnom_emp varchar(100),
#l2nom_emp varchar(100),
#id_type int,
#id_supervisor int = <default supervisor id>,
#correo varchar(50) = <default correo>,
#id_area int
as
begin
INSERT INTO [dbo].[empleados]
([id_emp]
,[nom_emp]
,[lnom_emp]
,[l2nom_emp]
,[id_type]
,[id_supervisor]
,[correo]
,[id_area])
Select #id_emp,
#nom_emp,
#lnom_emp,
#l2nom_emp,
#id_type,
CASE WHEN #id_supervisor = 0 THEN <Default SupervisorId> ELSE #id_supervisor END,
CASE WHEN #correo= '' THEN <Default correo> ELSE #correo END,
#id_area
return
end

Answer 4

Since you can pass null instead of 0 and '', then you can try this:
ALTER procedure [dbo].[altaemp]
#id_emp int,
#nom_emp varchar(100),
#lnom_emp varchar(100),
#l2nom_emp varchar(100),
#id_type int,
#id_supervisor int=100, -- Default value=100
#correo varchar(50)='my Default Value', -- Default Value
#id_area int
as
begin
INSERT INTO [dbo].[empleados]
([id_emp]
,[nom_emp]
,[lnom_emp]
,[l2nom_emp]
,[id_type]
,[id_supervisor]
,[correo]
,[id_area])
VALUES
(#id_emp,
#nom_emp,
#lnom_emp,
#l2nom_emp,
#id_type,
#id_supervisor,
#correo,
#id_area)
return
end
So, you can call the procedure like this:
EXEC [dbo].[altaemp]
#id_emp = yourValue,
#nom_emp = yourValue,
#lnom_emp = yourValue,
#l2nom_emp = yourValue,
#id_type = yourValue,
#id_supervisor = null, -- Specify Null or remove parameter
#correo = null, -- Specify Null or remove parameter
#id_area = yourValue