feat: show 'count distinct'

closes gvwilson#26
securegh · Feb 6, 2024 · 51803ad · 51803ad
1 parent 1b6584f
commit 51803ad
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diff --git a/index.md b/index.md
@@ -350,6 +350,7 @@ home: true
 
 - `count(*)` counts rows
 - <code>count(<em>column</em>)</code> counts non-null entries in column
+- <code>count(distinct <em>column</em>)</code> counts distinct non-null entries
 
 </section>
 <section markdown="1">

diff --git a/out/count_behavior.out b/out/count_behavior.out
@@ -1,3 +1,3 @@
-| count_star | count_specific |
-|------------|----------------|
-| 344 | 333 |
+| count_star | count_specific | count_distinct |
+|------------|----------------|----------------|
+| 344 | 333 | 2 |
diff --git a/src/count_behavior.sql b/src/count_behavior.sql
@@ -1,2 +1,5 @@
-select count(*) as count_star, count(sex) as count_specific
+select
+ count(*) as count_star,
+ count(sex) as count_specific,
+ count(distinct sex) as count_distinct
 from penguins;