From 93c3846ead451c5bb60e26b917f46f891cdcd6c1 Mon Sep 17 00:00:00 2001
From: Alex <xarlama@bk.ru>
Date: Sun, 18 Jan 2026 13:57:09 +0300
Subject: [PATCH] Base SQL homework

---
 aharlamcev/postgresql/BaseSQLhomework.sql     | 28 +++++++++++++++++++
 .../{DMLhomework => DMLhomework.sql}          |  0
 2 files changed, 28 insertions(+)
 create mode 100644 aharlamcev/postgresql/BaseSQLhomework.sql
 rename aharlamcev/postgresql/{DMLhomework => DMLhomework.sql} (100%)

diff --git a/aharlamcev/postgresql/BaseSQLhomework.sql b/aharlamcev/postgresql/BaseSQLhomework.sql
new file mode 100644
index 0000000..92666f2
--- /dev/null
+++ b/aharlamcev/postgresql/BaseSQLhomework.sql
@@ -0,0 +1,28 @@
+select * from users
+
+select id, name, country from users
+order by name;
+
+select id, name, country, created_at from users 
+where country = 'KZ'
+order by created_at desc;
+
+select id, name from users 
+where email is null;
+
+select id, name from users 
+where email is not null;
+
+update users 
+set email = 'alice@mail.com'
+where name = 'Alice';     -- в моей таблице ни у кого нет email, добавил чтобы посмотреть.
+
+select id, name, UPPER(email) as email_upper from users;
+
+select id, name, LOWER(email) as email_lower from users 
+where email is not null;
+
+select id, name, created_at from users 
+where created_at > '2024-01-11'
+order by created_at desc 
+limit 2;
diff --git a/aharlamcev/postgresql/DMLhomework b/aharlamcev/postgresql/DMLhomework.sql
similarity index 100%
rename from aharlamcev/postgresql/DMLhomework
rename to aharlamcev/postgresql/DMLhomework.sql