topic Re: join tables without creating a new table in Discussions

How to join tables without creating a new table?

KTo — Wed, 22 Aug 2018 21:13:59 GMT

LS,

I want to add data from a table to a main table. This can be easily done by using the "join" option from the tables menu. However, this generates a new datatable while I want to add data to the main data table.

Now I have to close the original main table and than overwrite the original file with all potential risks.

Is thisd possible, and how (note that I know that JMP uses scripts, but I am not familiar with building my own scripts

thanks

Kees

Re: join tables without creating a new table

Phil_Brown — Fri, 21 Apr 2017 13:21:34 GMT

Hi,

Instead of JOIN. Use the UPDATE option in the Tables Menu.

Re: join tables without creating a new table

txnelson — Fri, 21 Apr 2017 14:20:07 GMT

In the Join dialog box, there is a check box, that allows you to "Update main table with data from second table"

Re: join tables without creating a new table

Peter_Bartell — Fri, 21 Apr 2017 17:38:27 GMT

If you are running JMP/JMP Pro version 13 the new virtual join capability might be something worth looking at. Especially if the size of the joined data table takes up a relatively large RAM footprint on your computer. Here's the link to the virtual join portion of the JMP online documentation:

http://www.jmp.com/support/help/13-1/Virtually_Join_Data_Tables.shtml

Re: join tables without creating a new table

KTo — Mon, 24 Apr 2017 06:54:48 GMT

HY Phil,

Thanks for your reply. Unfortunately, and indeed unexpectedly because I also expected "update" to update the whole table, this command updates columns AND stores the update in a new table.

Thanks
Kees

Re: join tables without creating a new table

KTo — Mon, 24 Apr 2017 13:30:24 GMT

Hi Peter,

I have seen the option (I am using JMP13.1 since a few months).

Not sure if it will work; data needs to come from different locations on our internal network, and multiple people will work with the merged file.

The help indicates that this option is specially designed to prevent creating massive files that slow down pc’s / laptops. Up till now, our files are still relatively small (<1000 rows and <50 columns).

I will look into this option, but hoped for a more simple solution J

Cheers

Kees

Re: join tables without creating a new table

miguello — Tue, 22 Sep 2020 19:09:19 GMT

Strange, in my case it still creates a new table.

Re: join tables without creating a new table

txnelson — Tue, 22 Sep 2020 21:17:40 GMT

If you use
Tables=>Update
it will not create a new table

Re: join tables without creating a new table

jwiltsie — Mon, 05 May 2025 18:22:14 GMT

This creates a new data table per the JMP 18.1 documentation:

Update main table with data from second table

Data in the original table are updated with data in columns that have the same names. The results are displayed in a new data table.

I think this didn't used to create a new data table. Was this changed recently?

I found a JMP Wishlist item for this: Tables join: option to update main table. Please upvote the Wishlist item if you would like to see this implemented in JMP.

Re: join tables without creating a new table

txnelson — Mon, 05 May 2025 17:44:32 GMT

Tables=>Join

always creates a new data table.

Tables=>Update

does not create a new table

Re: join tables without creating a new table

Phil_Brown — Mon, 25 Aug 2025 22:50:09 GMT

You are looking at the documentation for JOIN DATA TABLES. There is an option when joining tables, to "Update main table with data from second table". This is different from the other function -- UPDATE DATA TABLEs

See the following link for the details: Update Data Tables

Re: join tables without creating a new table

jwiltsie — Tue, 09 Sep 2025 20:52:12 GMT

Tables => Update does not work for my situation, since it cannot do an Inner or Right Outer Join.