From 10017a9630a96c289e64252c3decf0c128bfdc1b Mon Sep 17 00:00:00 2001 From: "Karl O. Pinc" Date: Fri, 7 Mar 2025 10:49:04 -0600 Subject: [PATCH] Explain why ER diagrams are useful --- doc/src/er_diagrams.m4 | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/doc/src/er_diagrams.m4 b/doc/src/er_diagrams.m4 index 10a864a..b110b56 100644 --- a/doc/src/er_diagrams.m4 +++ b/doc/src/er_diagrams.m4 @@ -30,6 +30,10 @@ of how rows in the database's tables relate to other rows. They are dense in information about what data exists and in what tables it can be found. +ER diagrams are useful because they provide at-a-glance overviews. +They allow you to locate the data in which you are interested and +give guidance as to how to retrieve it. + Most tables have have an id, or key, column that contains a number unique to that row within its table. The id can be used, in perpetuity, to refer to its related row and distinguish it from all -- 2.34.1