# Thread: Finding Redundant Logic Ties

1. Registered User
Join Date
Oct 2007
Posts
2

## Unanswered: Finding Redundant Logic Ties

Hello,

I have two columns of data, Column "A" and Column "B". Every value that appears in "A" also appears in "B", but they appear in different columns different numbers of times. For instance say I have 1,000 values but 30,000 rows. Obviously at least one value has to appear in each column more than once. Value "X" may appear in Column "A" 500 times, but only twice in Column "B".

Here's what I need to do. In the example below, activity 1 is succeeded by activity 2. Activity 2 is succeeded by activity 3. But, activity 3 is also shown as a successor to activity 1. This is redundant. If 3 can’t happen until after 2, and 2 can’t happen until after 1, it is redundant to say 3 can’t happen until after 1.

ACTIVITY>>>SUCCESSOR

1>>>>>>>>>>>>>2
1>>>>>>>>>>>>>3
2>>>>>>>>>>>>>3

Could someone here help me set something up to identify this redundant logic?

Jerry
Last edited by airduds; 10-10-07 at 15:00.

Join Date
Feb 2004
Location
New Zealand
Posts
1,478
Out join and inner Join

in english

in Query Design View

With the 2 table Join the Feild with a Black line

If you right click on the Black Line

click Join prpoertes

you have 3 option

1 only include rows where the joined fields are the Same .....
2 include ALL records from table1 ......
3 include ALL records from table2 ......

pick one

reading the OPtion will make cents

Then you can show all all the blank one in one of the tables

EG

A B
1 >>>>> 1
2 >>>>> 2
3 >>>>> 4
4 >>>>> 4
5 >>>>> 6

With the Right Join you can create a query that will show you

number 3 is missing from table B

3. Registered User
Join Date
Oct 2007
Posts
2
Thanks for your reply. I forgot to say the two values in a row will never be the same.

Does that make a difference?

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