update

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Update
![x;y;z;u]
Supported in K4

update is a special form of ! in K4/qdb[1] which takes 4 arguments. It updates a given table with the help of the given arguments.

  • x is the table to be modified.
  • y specifies the conditions to select rows.
  • z, a dict, selects columns and gives the placeholder names to use in u.
  • u, a dict, specifies what should be done to the selected cells.

References[edit]

  1. ↑ https://code.kx.com/q/basics/funsql/#update
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