MapInfo data filtering / query

[karpp...@gmail.com]

I want to display only certain data points from the table file on the map, for example, only points coded e.g. 310. How to do this?

[Data Directions]

Run a Query > Select, and assuming your column is named “Locations” the query would either be:

 

Locations = “310” (if the column is a character field)

 

OR

 

Locations = 310 (if the column is a numerical field … no quotes required).

 

Then go to your Layer Control, turn off the display for the source “Point table” and add in your “Selection”

 

Only the “310” points will be shown.

 

Regards,

 

Bill

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[karpp...@gmail.com]

This is great, thank you!

I tried this, but did not manage to do this, I did not find any useful information in the instructions or manual.
The secret was the quotes...


Greetings,

PK

[smart...@gmail.com]

Or, if you have a very recent version of MapInfo, you can do the same thing, somewhat more easily, through the Browser window's Filter dialog.  Once you get the filter set up the way you like, there's a Create Query menu item that turns that filter condition into a query, with an option to add it as a layer to your map.