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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;
13 gru 2019 · Just for example: With DependencedIncidents AS ( SELECT INC.[RecTime],INC.[SQL] AS [str] FROM ( SELECT A.[RecTime] As [RecTime],X.[SQL] As [SQL] FROM [EventView] AS A CROS...
These queries cover a variety of common scenarios such as selecting specific movie information, filtering data based on conditions, and retrieving data from multiple tables. Ideal for SQL learners looking to sharpen their query writing abilities.
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.
The Movie Database project aims to comprehensively catalog information about movies, directors, actors, genres, and user ratings. It exemplifies the application of SQL in developing and managing a relational database, highlighting expertise in advanced queries, subqueries, and data integrity maintenance.
Here I will explore SQL queries to analyze a movie database, looking at different aspects of the database, from movie details to actor and director information. Each SQL query looks...
A much better solution to this problem is to use a subquery. By definition, a subquery is a query nested inside another query such as SELECT, INSERT, UPDATE, or DELETE statement. In this tutorial, we are focusing on the subquery used with the SELECT statement.
