Message delivery semantics between microservices.
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C#
The application with the database works in one environment, but degrades in another. Why?
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156
How to fix it so that it displays 0-9?
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How do transactions work with versions in MVCC?
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153
How were access rights checked?
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Collection of functions, loop 0-9, add lambdas capturing i, call all. What will it output?
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Redis is unavailable, multiple instances — how to ensure cache consistency?
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From the perspective of metric visualization — custom or standard solution?
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Why is there no read uncommitted in PostgreSQL?
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How is authorization implemented?
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How are strings stored in .NET?
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Do you know ref struct?
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Tell about your experience with Rider, Docker, and development tools.
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Used LINQ? What is materialization?
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Singleton with a lock object, static field instance, private constructor, and GetInstance method. What are the issues?
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What do you suggest to a developer to improve testability?
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Дана таблица: create table bank_users ( id bigint generated by default as identity primary key, status int, employee_number varchar(8) unique, first_name varchar(100) not null, last_name varchar(100) not null, middle_name varchar(100) default null, email varchar(100) not null unique, created_at_date_time timestamptz ); create index ix_created_at_date_time_status on bank_users (created_at_date_time, status); Есть запрос: explain (costs off, verbose) select employee_number, first_name, last_name from bank_users where status = 2 order by created_at_date_time; Возвращает: Sort Output: employee_number, first_name, last_name, created_at_date_time Sort Key: bank_users.created_at_date_time -> Seq Scan on bank_users Output: employee_number, first_name, last_name, created_at_date_time Filter: (bank_users.status = 2) Что можно сказать об оптимальности плана запроса?
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Have you used SelectMany?
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Database normalization.
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Do you know ArrayPool?
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