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How To Combine Tables in Access

Posted on 2004-08-02
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Last Modified: 2011-08-18
Hi.....could you please tell me step by step how to combine tables with the excat same fields in Access. I read somehting aboutn a UNION query but have no idea how to do it. Thanks.
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Question by:Nomad2012
9 Comments
 
LVL 17

Expert Comment

by:walterecook
ID: 11698969
Select field1, field2, field3
from table1
Union
select field1, field2, field3
from table2

This will throw out duplicates
If you want to include duplicates...
Select field1, field2, field3
from table1
Union
select ALL field1, field2, field3
from table2

The key is the number of fields must be the same and in the same order and each field must be of the same datatype.

Walt
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Expert Comment

by:SweatCoder
ID: 11698973
select * from mytable1
union
select * from mytable2

if field number and types are not identical, you can't use *, you need field list and they must match up, both number and data type.
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Accepted Solution

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walterecook earned 500 total points
ID: 11698974
Whoops
I moved the all....
rather,
Select field1, field2, field3
from table1
Union ALL
select field1, field2, field3
from table2


sorry
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Expert Comment

by:SweatCoder
ID: 11698976
i guess i got beat to the punch.  :-)
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LVL 44

Expert Comment

by:GRayL
ID: 11698989
In union queries, the first select statement provides the field names for the query. Thus a query Query1:

Select fld1, fd2, fld3 from table1
order by fld1
UNION
select fld43, fld22, fld33 from table2
order by fld43;

provides a table called Query1 in which each of the data types in each field of table1 are the same in each of the successive tables;
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LVL 13

Expert Comment

by:TommyTupa
ID: 11699921
Union queries are OK but you can do the same thing with no coding given tables with exact structures.

1. Select table, right click and copy.
2. Rightclick Paste.
3. Select Paste Append and select the table to append to.
4. Click OK and you've just combined tables.
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LVL 17

Expert Comment

by:walterecook
ID: 11703746
Well Tommy, that's true.  But an Append query works much better for something like that.

Walt
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