From e3a3b871ec6b01bbf25c2655f4114d8c5ec9e4e7 Mon Sep 17 00:00:00 2001
From: GowthamRaj K <43011442+gowthamrajk@users.noreply.github.com>
Date: Thu, 29 Jul 2021 08:11:06 +0530
Subject: [PATCH] Update README.md

---
 README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README.md b/README.md
index 185c3c9..cd424e8 100644
--- a/README.md
+++ b/README.md
@@ -597,5 +597,12 @@ There are different types of joins available in SQL −
     
 # SQL - UNIONS CLAUSE ✅
 
+- The SQL UNION clause/operator is used to combine the results of two or more SELECT statements without returning any duplicate rows.
+- To use this UNION clause, each SELECT statement must have
 
+**- The same number of columns selected**
+
+**- The same number of column expressions**
+
+**- The same data type and have them in the same order**