Compare values in in two tables fields

I need to create a procedure which will be able to check if some value in field of one table doesn't exist in the field with the same name and data type in other table.
I'm using two RS-s method to loop trough the data of both tables

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Compare two tables and find records without matches
Sometimes you may want to compare two tables and identify records in one of the tables that have no corresponding records in the other table. The easiest way to identify these records is by using the Find Unmatched Query Wizard. After the wizard builds your query, you can modify the query's design to add or remove fields, or to add joins between the two tables (to indicate fields whose values should match). You can also create your own query to find unmatched records, without using the wizard.

Compare values in two columns present in seperate tab
How can I compare values in two columns (columns are in different tables) ? I also want to display the values that don't match in a separate table.

For eg:

If values in Column1 from Table1 does not match Values in Column1 from Table2 then display those values in a separate table

Is there a way to do this?

Queries to Compare Two Tables
I am trying to compare the data in two tables. The columns are the same, deleted rows, or changes in specific fields across the two tables.

The Query Wizard for Unmatched doesn't quite accomplish what I am trying to do. If TableB is missing a row from Table A then it will return new rows if I select the two tables in the proper order (reversing will return nothing).

I still do not receive anything if simply one field for one row was changed (everything else the same).

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I have a form that takes user input (about 20 text boxes) and writes to fields in a table. Form is locked to one record per instance.

I need to compare the user input to values in a table. The table is structured so that each record is relative to one specific field in the table (also one specific textbox on the form)and each record has three fields with values that determine a 'range'.
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What is the most efficient way to do this?
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Table 2 - fields: Name, occupation

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Compare records in 2 tables
to all
I am trying to solve the problem of reviewing records from 2 different tables. Both tables have the same fields both in Name and type. There is 6 fields to each table to compare. Each field can have a different number up to 42. I am trying to see how many of the numbers in a given record for table 1 matches the records in table 2. below is an example of what I am doing.

Tble1 Tble2
N1 = 2 N1 = 5
N2 = 24 N2 = 2
N3 = 5 N3 = 10
N4 = 9 N4 = 31
N5 = 10 N4 = 36
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Using the if statments I am currently using this will deliver me 3 matching numbers on 2, 5 and 10.

As I said I am using IF staments to this right now. Is there a better, more efficent way to accomplish the same thing. Tble1 is a small table but Tble2 has a large number of records and process time is about 25 minutes.

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Im back again. This time I want to compare two tables in two different databases. I have an archive database and I want to make sure that both tables are equal before I delete the information from the production databases table. Ive been looking around and have been finding that I should be using a UNION query but I dont know how.
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I have two large csv files that Excel can't fully open so I merged them together using CMD copy *.csv (the files have identical headers so this should be fine).

I opened them in access because what I want to achieve getting the unique values into one table.

So I made a query and I think I have done it correctly but I want to check as it's important. So from this one file I want the unique values is this correct?

SELECT First(Compare.[Email]) AS [Email Field], Count(Compare.[Email]) AS NumberOfDups FROM Compare GROUP BY Compare.[Email] HAVING (((Count(Compare.[Email]))>1));

It's made a query which I tried to export as CSV which failed for the silly reason of the clipboard only being able to hold 65k records so thats annoying. If anyone knows how to get round that that would help too

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I currently have relationships between the three fields. I would like to be able to search equal between LASTNAME, FIRSTNAME, and 1st letter of MIDNAME. I don't know how to specify just the first character. So when working if one table has Mary A Roberts and the second has Mary Alice Roberts it will see them as being equal.

Using IIF to compare two fields data
I have a form that I like to do some field compare.
Subj_num to c-subj_num
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I have a query. how do I subtract numerical values btw tables? pls look at the atatched file. I have 2 tables (Table1 and Table2) with several fields [ABC], [XXX], [YYY] . in both tables. I need to subtract the values under these but I need to get what is displayed in Query1 showing individual difference (not overall difference - if so I could have combine the fields into one field like "ABCXXXYYYZZZ " to get the value of 38. I could do this in excel and just pivot out the dataset to get the individual difference but its tedious and I want to learn how to do it in access because I foresee I have to do a lot of such multiple tables subtraction so its better I do this in access

Compare two tables and find only matching data
Sometimes you may want to review records from one table only if there are corresponding records in another table that contain one or more fields with matching data.
This article discusses how to compare two tables to identify matching data, and provides sample data that you can use with example procedures.

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I want to compare if the data in two tables (identical structures) is same when the tables exist in two different databases. (I have requirement for SQL Server 2005)

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