topic Re: Data lost when joining table in Discussions

Data lost when joining table

UserID16644 — Sat, 10 Jun 2023 23:40:05 GMT

Hi all,

I am trying to join 2 data tables but the data from my second data table kept on losing. I don't know how to do this, but I am using three columns to match. Is joining the table affected on how you match the data? Pls help

Re: Data lost when joining table

pmroz — Fri, 05 Nov 2021 02:36:19 GMT

If you can supply some example data we would be better able to assist you.

Re: Data lost when joining table

UserID16644 — Fri, 05 Nov 2021 12:15:03 GMT

Here's my sample data and sample script

Data Table( "sample2" ) << Join(
    With( Data Table( "sample1" ) ),
    By Matching Columns( :SliderSN = :SliderSN, :STO_I1 = :STO_I1, :STO_I2 = :STO_I2 ),
    Drop multiples( 0, 0 ),
    Include Nonmatches( 1, 0 ),
    Preserve main table order( 1 )
)

Re: Data lost when joining table

jthi — Fri, 05 Nov 2021 05:47:14 GMT

What sort of table do you want to end up with? The data from second table could have lost because there is nothing to match the table 1 with and you are using left join.

Try playing around with different types of include-non-matches options with enable match flag enabled. Also you can enable Keep Dialog Open to prevent modal from closing after pressing Apply. Makes it easier to test different options.

You could also try concatenating the data because you have same columns