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A data table is a hand-authored Summation table — a grid you fill in and maintain yourself. Reach for one when you want reference or master data, a manually curated list, or any dataset you’d rather enter by hand than import or compute. What you can do
  • Edit rows directly in the grid — add, update, and delete.
  • Add columns of any type (Text, Integer, Number, Date, Boolean), plus SQL / computed columns and Dimension columns that reference a dimension table.
  • Mark one column as the table’s key with the Set as key radio in the grid. (The primary_key is shown read-only, and “business keys” is only a backend parameter on the upsert path — neither is set here.)

Create a data table

On the Tables page, click Create → Data Table. You land on the table’s grid, where the + Add column menu adds typed or computed columns and you enter rows.
A data table 'DemoDataTable' with a '# Height' column and a '+ Add' column button; the Add-column menu lists SQL, Dimension, Boolean, Date, Integer, Number, and Text.

Adding a column to a data table