Doc: Miscellaneous doc updates for MERGE.

Dean Rasheed <dean.a.rasheed@gmail.com>

Commit: a6864751cd11ae99c16da48d603fafa55ce8e57e
Author: Dean Rasheed <dean.a.rasheed@gmail.com>
Date: 2023-02-26T09:04:04Z
Releases: 15.3
Doc: Miscellaneous doc updates for MERGE.

Update a few places in the documentation that should mention MERGE
among the list of applicable commands. In a couple of places, a
slightly more detailed description of what happens for MERGE seems
appropriate.

Reviewed by Alvaro Herrera.

Discussion: http://postgr.es/m/CAEZATCWqHLcxab89ATMQZNGFG_mxDPM%2BjzkSbXKD3JYPfRGvtw%40mail.gmail.com

Files

Documentation touched

Discussion