added sets sql

Author: singhsidhukuldeep

docs/Cheat-Sheets/SQL.md

@@ -391,6 +391,48 @@ FROM table1
 CROSS JOIN table2;
 ```
 
+## Set Operations
+
+### UNION
+
+Combines the results of two `SELECT` statements and removes duplicate rows.
+
+```sql
+SELECT column1, column2 FROM table1
+UNION
+SELECT column1, column2 FROM table2;
+```
+
+### UNION ALL
+
+Combines the results of two `SELECT` statements, including duplicate rows.
+
+```sql
+SELECT column1, column2 FROM table1
+UNION ALL
+SELECT column1, column2 FROM table2;
+```
+
+### INTERSECT
+
+Returns the rows that are common to both `SELECT` statements.
+
+```sql
+SELECT column1, column2 FROM table1
+INTERSECT
+SELECT column1, column2 FROM table2;
+```
+
+### EXCEPT
+
+Returns the rows that are in the first `SELECT` statement but not in the second.
+
+```sql
+SELECT column1, column2 FROM table1
+EXCEPT
+SELECT column1, column2 FROM table2;
+```
+
 ## Subqueries
 
 ```sql

mkdocs.yml

@@ -107,6 +107,7 @@ theme:
 #plugins
 plugins:
   # - optimize
+  - glightbox
   - enumerate-headings:
         toc_depth: 6
         strict: true

requirements.txt

@@ -4,6 +4,7 @@ mkdocs-minify-plugin
 mkdocs-simple-plugin
 mkdocs-git-revision-date-localized-plugin
 mkdocs-enumerate-headings-plugin
+mkdocs-glightbox
 mkdocs-with-pdf
 mkdocs-jupyter
 qrcode