Does lightning-datatable sort the data by itself?

No. sortable: true only adds a clickable header arrow and fires onsort. Your handler sorts a copy of the data and sets sorted-by and sorted-direction.

How do I hide the checkbox column in a lightning datatable?

Add the hide-checkbox-column attribute to the lightning-datatable tag. To allow only one selected row instead, set max-row-selection="1", which shows radio buttons.

How do I get the selected rows from a lightning datatable in LWC?

Read event.detail.selectedRows in the onrowselection handler, or call getSelectedRows() on the datatable through an lwc:ref when you need the selection later.

Can I show more than one field in a single datatable column?

Not through a column property. Build a new property on each row (for example City + State) on a copy of the data, then point the column fieldName at it.

Is lightning-datatable supported in the Salesforce mobile app?

No. The lightning-datatable component reference says it is not supported on mobile devices, so plan a list layout for phone users. The wire service guide explains why wired rows must be copied before you reshape them.

Lightning Datatable in LWC: Apex, Sorting, Row Selection

Pass a raw Apex result to an HTML table and you get revenue printed as 126000000, account names nobody can click, and sort arrows that do nothing. The lightning-datatable base component fixes the formatting with typed columns, but sorting, combined columns and selection still need a few lines of JavaScript from you.

We built the whole thing in a Winter ’27 Developer Edition org (API 67.0): a partner accounts table fed by a cacheable Apex method, with a linked name column, a combined City + State column, sorting and a selection counter. By the end you can build a lightning datatable in LWC on your own object, test the Apex behind it, and avoid the mistakes that leave it blank.

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