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Contributor

Joined:

Apr 27, 2018

## Check data in rows of one table to see if they are in columns of another

First table:

Second table:

I am trying to check the maximum values in the fourth row of 1st table against their adjacent columns from the second table.

So far, I have extracted column names and row values from the first table:

``````dt1 = Open();
namesForCols = dt1 << get column names("String");
show(namesForCols);

row4 = dt1[4, 0];
show(row4);

close(dt1,nosave);``````

How can I check whether values in list row4 exist in columns of the second table? Thanks.

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Super User

Joined:

Jun 22, 2012

## Re: Check data in rows of one table to see if they are in columns of another

``````Names Default To Here( 1 );
dt1 = Data Table( "Table 1" );
dt2 = Data Table( "Table 2" );

// Get the numeric columns
colNamesList = dt1 << get column names( numeric, string );

// Add a new row of data, that will tell how many rows in
// Table 2 have the maximumn values from row 4
dt1 << add rows( 1 );
dt1:Column 1[N Rows( dt1 )] = "Number of Rows Found";

// Loop across the numeric columns in table 1
For( i = 1, i <= N Items( colNamesList ), i++,
// If the column in table 2 exists, process
If( Try( Column( dt2, colNamesList[i] ) << get name, "" ) != "",
// Get the value from table 1 to compare with in table 2
compareValue = Column( dt1, colNamesList[i] )[4];

// Find the number of rows in table 2 that match the
// value in row 4 of table 1 and save it into row 5
// of table 1
Column( dt1, ColNamesList[i] )[N Rows( dt1 )] =
N Rows(
dt2 << get rows where(
As Column( dt2, colNamesList[i] ) == compareValue
)
);
)
);``````
Jim