union

2 years ago · c12c45bd2d
parent e796875b3b
commit c12c45bd2d
2 changed files with 5 additions and 0 deletions
--- a/SQL/lessons/.sql_3.md.swp
+++ b/SQL/lessons/.sql_3.md.swp
--- a/SQL/lessons/sql_3.md
+++ b/SQL/lessons/sql_3.md
@ -89,6 +89,11 @@ SELECT DISTINCT city FROM people;

 ### Unions

+```sql
+SELECT name FROM people UNION SELECT name FROM companies; -- show distinct values
+SELECT name FROM people UNION ALL SELECT name FROM companies; -- show duplicates
+```
+
 ### Truncate

 ### Triggers