<div dir="auto">Hi<div dir="auto"><br></div><div dir="auto"><span style="font-family:sans-serif">functionalities like sqrt() or log() are not available in base SQLite, then you have to install an extension</span><br></div><div dir="auto"><span style="font-family:sans-serif"><br></span></div><div dir="auto">See v.db.update manual page and this wiki: <a href="https://grasswiki.osgeo.org/wiki/Build_SQLite_extension_on_Linux">https://grasswiki.osgeo.org/wiki/Build_SQLite_extension_on_Linux</a></div><div dir="auto"><br></div><div dir="auto">HTH,</div><div dir="auto">Vero</div><div dir="auto"><br></div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">El vie., 8 mar. 2019 05:22, Frank David <<a href="mailto:frank.david@geophom.fr">frank.david@geophom.fr</a>> escribió:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
How Is it possible to calculate a sqrt from attribut fields to fill <br>
another field, like :<br>
<br>
v.db.update map=myvector column=field2 query_column=sqrt(field1)<br>
<br>
Or is there any trick ?<br>
<br>
Thank you<br>
<br>
Frank<br>
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