убрал :

mnoskov/clickhouse/Практика clickhouse/2. Запросы/3. Массивы, Map и вложенные структуры/practice_arrays_maps_and_nested_structures.sql

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+-- Задание 1
+
+--1-2
+SELECT
+	user_id,
+	tags,
+	indexOf(tags, 'promo') AS pos_promo
+FROM
+	mnoskov.events
+WHERE
+	has(tags, 'promo');
+
+--3
+SELECT
+	user_id,
+	arrayJoin(tags) AS tag
+FROM
+	mnoskov.events;
+
+
+-- Задание 2
+
+--1
+SELECT user_id, scores['math'] FROM mnoskov.metrics;
+
+--2
+SELECT user_id, mapValues(scores) FROM mnoskov.metrics;
+
+
+-- Заданик 3
+
+--1
+SELECT * FROM mnoskov.users_nested WHERE has(contacts.type, 'email');
+
+--2
+SELECT
+	id,
+	name,
+	c.type,
+	c.value
+FROM
+	mnoskov.users_nested
+ARRAY JOIN
+	contacts AS c;