From dcd8bb903e676d7416a6907d96c5501d32111b5f Mon Sep 17 00:00:00 2001
From: "Rico Sta. Cruz" <rstacruz@users.noreply.github.com>
Date: Mon, 30 Oct 2017 00:03:38 +0800
Subject: [PATCH] sql-join: update

---
 sql-join.md | 31 +++++++++++++++++++++----------
 1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/sql-join.md b/sql-join.md
index 875e86467..d5e6392b8 100644
--- a/sql-join.md
+++ b/sql-join.md
@@ -1,20 +1,31 @@
 ---
-title: SQL Join
+title: SQL joins
+layout: 2017/sheet
+updated: 2017-10-30
+weight: -1
 ---
 
+### Example
+
 ```
 SELECT * FROM order_items LEFT OUTER JOIN orders ON order_items.order_id = orders.id
 ```
+{: .-wrap}
+
+### Diagram
 
 ```
-.--------.
-| A  .---+----.
-|    | ∩ |    |
-'----+---'  B |
-     '--------'
+┌────────┐
+│ A  ┌───┼────┐
+│    │ ∩ │    │
+└────┼───┘  B │
+     └────────┘
 ```
+{: .-box-chars}
 
-* inner join = `∩`
-* left outer join = `A` + `∩`
-* right outer join = `∩` + `B`
-* full outer join = `A` + `∩` + `B`
+| Join             | What            |
+| ----             | ----            |
+| Inner join       | `∩`             |
+| Left outer join  | `A` + `∩`       |
+| Right outer join | `∩` + `B`       |
+| Full outer join  | `A` + `∩` + `B` |