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27 cze 2016 · SELECT video_id, SUM (new_end - new_start) total_time FROM (SELECT DISTINCT a.video_id, (SELECT MIN (event_start) FROM videos b WHERE ( (a.event_start BETWEEN b.event_start AND b.event_end) OR (a.event_end BETWEEN b.event_start AND b.event_end)) AND a.video_id = b.video_id) new_start, (SELECT MAX (event_end) FROM videos b WHERE ( (a.event_start ...
6 dni temu · 3.1. In the SELECT Clause. First, we’ll take a look at an example with the Student and Exam tables, in which we’ll retrieve each student’s name and the number of exams they’ve taken: SELECT s.name, (SELECT COUNT (*) FROM Exam e WHERE e.student_id = s.id) AS exam_count FROM Student s;
SQL is one of the most important skills to have for data people. In this comprehensive video, learn how to use SQL to perform common data analysis tasks.
22 lis 2012 · You can use an order by in a sub query when you use a TOP statement. select * from (select TOP 100 PERCENT Date_Réserve,Heure_Réserve from réserve order by Date_Réserve) t order by Heure_Réserve
18 gru 2023 · You can refer to each WITH statement multiple times in another WITH statement or in a main query. In our example, we referenced the first defined WITH (the country_export_by_product CTE) in two places: In the second WITH (the country_export_total CTE) and in the main query.
10 paź 2024 · This document describes how to use multi-statement queries in BigQuery, such as how to write multi-statement queries, use temporary tables in multi-statement queries, reference variables in...
17 sie 2023 · It has 129 interactive exercises on querying one or more tables, aggregating and grouping data, JOINs, subqueries, and set operations. Even with the 20 upcoming examples, we won’t show all the details or even all the basic-level queries.
