Validate information

  • Thread starter Thread starter Joseph
  • Start date Start date
J

Joseph

I have a table with 3 fields licence number = 6
characters / name of license holder & address off licence
holder. The second table are individuals who may operate
under those license numbers in the first table. My
question is can I validate or restrict the information
entry into the second table with only valid license
numbers that exist in the first field of table one?

Any help would be greatly appreciated.
 
Licence Number in the first table should be a primary key. You can then set
your relationships to enforce referential integrity.
 
Thanks, I tried this but I have a problem. It will not
allow me to add any records because a related record is
required where the field is a primary key.

Any help?
Thanks Again
 
Could you provide your table structures and which are the primary and
foreign keys? Which table can't you enter records into?
 
This may sound st*&*()) but how do I provide it?
-----Original Message-----
Could you provide your table structures and which are the primary and
foreign keys? Which table can't you enter records into?

--
Duane Hookom
MS Access MVP





.
Click to expand...
 
Reply to the group and type in something like:

tblTableA
=================
FieldA Numeric Primary Key
FieldB Text
FieldC Date
FieldD Text

tblTableB
=================
Field1 Numeric Primary Key
FieldA Numeric Foreign Key to tblTableA.FieldA
Field3 Date
Field4 Numeric
 
Thanks for the help.

TableOne
==========
Base license # Text Primary
Company Name Text
group name Text

TableTwo
=========
dbase licence # text
t license # text
t license exp date/time
first name text
last name text

Thanking you again for all your help.

Joseph
 
Your fields don't exactly match with your early post. Regardless, how are
the tables related? My example suggested which field value in table2 is
related to the primary key of table1.
 
Table one base licese # is the primary. The dbase license
# in table two is the same. I would like to create a way
by which the user could not enter information for anyone
if the dbase license does not exist in table one base
license #.

Joseph
 
Go back to my first reply. Do you understand how to create relationships
between tables?
 
Hi Again,

I thought I did. By creating the relationship between the
the 2 tables and having checked off referential integrity
relationship type one-to-many gives me an error message
of 'You cannot add or change a record because a related
record is required in 'table2'.
 
Remove any relationships by clicking any join lines and pressing the delete
key. Then grab and drag the primary key from your one table (it should be
bold) and drop it on the similar field in your second table. Set the join
property to enforce referential integrity. If this can't be accomplished due
to records in table two that don't have a matching record in table one then
either add the record to table one or delete the record(s) from table two.
 
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