task up to arrays

2026-01-29 04:50:55 +07:00
parent 97d55ac267
commit 0e385bd6d0
6 changed files with 420 additions and 0 deletions
@@ -0,0 +1,103 @@
+--task 1
+	create table mdrozdov.products (
+	    product_id Int,
+	    name String
+	)
+	engine = MergeTree
+	order by product_id
+	
+	insert into mdrozdov.products values
+	(101,	'iPhone 14'),
+	(102,	'Galaxy S22'),
+	(103,	'Pixel 7')
+	
+	create table mdrozdov.prices (
+	    product_id Int,
+	    price Int,
+	    region String
+	)
+	engine = MergeTree
+	order by product_id
+	
+	insert into mdrozdov.prices values
+	(101,	999,	'US'),
+	(101,	1049,   'EU'),
+	(102,	850,	'US'),
+	(102,	899,	'CA'),
+	(103,	799,	'JP')
+	
+	-- 1) 
+	select 
+		product_id,
+		name,
+		price,
+		region
+	from mdrozdov.products
+	any left join mdrozdov.prices
+		on mdrozdov.products.product_id = mdrozdov.prices.product_id
+	
+	-- 2) 
+	create table mdrozdov.ticks 
+	ON CLUSTER clickhouse_cluster (
+		time DateTime,
+		symbol String,
+		price Decimal(10, 2)
+	)
+	engine = ReplicatedMergeTree(
+		'/clickhouse/tables/{shard}/mdrozdov/ticks',
+		'{replica}'
+	)
+	order by (time, symbol)
+	
+	insert into mdrozdov.ticks values
+	('2025-07-17 10:00:00',	'AAPL',	190.5),
+	('2025-07-17 10:01:00',	'AAPL',	191.2),
+	('2025-07-17 10:02:30',	'AAPL',	192.0),
+	('2025-07-17 10:05:00',	'GOOG',	2850.0)
+	
+	create table mdrozdov.orders
+	ON CLUSTER clickhouse_cluster (
+		time 	DateTime,
+		symbol 	String,
+		size 	Int
+	)
+	engine = ReplicatedMergeTree(
+		'/clickhouse/tables/{shard}/mdrozdov/orders',
+		'{replica}'
+	)
+	order by size
+	
+	insert into mdrozdov.orders values
+	('2025-07-17 10:00:30',	'AAPL',	50),
+	('2025-07-17 10:02:00',	'AAPL',	75),
+	('2025-07-17 10:03:00',	'AAPL',	20),
+	('2025-07-17 10:04:00',	'GOOG',	15)
+	
+	select
+		o.time,
+		o.symbol,
+		t.price as last_price
+	from mdrozdov.orders o
+	asof join mdrozdov.ticks t
+		on o.symbol = t.symbol and o.time >= t.time
+	
+	-- task 3
+	select 
+		user_id,
+		name
+	from users
+	where user_id in (
+		select user_id
+		from payments
+		where amount > 1000
+	)
+	
+	-- task 4
+	select 
+		bl.user_id,
+		u.name,
+		bl.event_time,
+		bl.event_type, 
+	from big_logs bl
+	any left join users u
+		using(user_id)