Question : How do I lookup and insert the foreign key value into a table when passing a variable value from different column in the related table?

Table A contains fields: [Name] as varchar, [AlphaNumber] as numeric, and [SiteCode] as varchar. Data in this table is static.  AlphaNumber is the Primary key in Table A. I am using a stored procedure to populate the combo box on a form and display the [Name] field to the operator from Table A.  All the data entered on the form will be inserted into table B.

Table B contains the field [ValidOPId] as numeric and is the foreign key related to the [AlphaNumber] field in Table A.
 
So far, I have written this stored procedure and successfully inserted data to Table B (without the form).

ALTER Procedure [dbo].[spLocal_InsertValidationData]
@TagName Varchar(50),
@ValidTime datetime,
@Value real,
@Reason1 varchar(50),
@Reason2 varchar(50),
@Reason3 varchar(50),
@Reason4 varchar(50),  
@Comments varchar(50),
@ValidOPId numeric,  
@ValidAPMId numeric,  
@ValidPMId numeric,
@InterfaceFlag bit,
@OOSpecFlag bit

AS
 
INSERT INTO ValidationDetail

VALUES
(@TagName,@ValidTime,@Value,@Reason1,@Reason2,@Reason3,@Reason4,@Comments,@ValidOPId,@ValidAPMId,@ValidPMId,@InterfaceFlag,@OOSpecFlag)

Return

Need to modify this procedure to write the [Name] from the combo box on the form back out to table B [ValidOPId].   Need to convert it back to the related numeric [AlphaNumber] that corresponds to the name selected in the combo box on the form first.  

Can you help?

Answer : How do I lookup and insert the foreign key value into a table when passing a variable value from different column in the related table?

There are two ways:
1) [preferable] - in html form combo box - set the value of option tag as the AlphaNumber from TableA. So, when ever form submits - it will send the value of selected option from combo box - so, it will pass the AlphaNumber instead of displayed text. This way, your stored procedure will remain as it is.

2) Change the SP as:

ALTER Procedure [dbo].[spLocal_InsertValidationData]
@TagName Varchar(50),
@ValidTime datetime,
@Value real,
@Reason1 varchar(50),
@Reason2 varchar(50),
@Reason3 varchar(50),
@Reason4 varchar(50),  
@Comments varchar(50),
@Name varchar(50),  
@ValidAPMId numeric,  
@ValidPMId numeric,
@InterfaceFlag bit,
@OOSpecFlag bit

AS
Declare @ValidOPId  int
Select @ValidOPId =  AlphaNumber From [TableA] Where [Name] = @Name

INSERT INTO ValidationDetail
VALUES
(@TagName,@ValidTime,@Value,@Reason1,@Reason2,@Reason3,@Reason4,@Comments,@ValidOPId,@ValidAPMId,@ValidPMId,@InterfaceFlag,@OOSpecFlag)