“How do I JOIN, THEN WHERE, THEN LIMIT/OFFSET in MySQL?”
my_tickets +-----------+---------+ | ticket_id | user_id | +-----------+---------+ | 186 | 2 | | 187 | 2 | | 188 | 2 | | 253 | 33 | | 254 | 33 | | 256 | 33 | | 261…
How many row should lock when using SELECT .. FOR UPDATE LIMIT 1 – Mysql
I have a simple table with an index on the count column | Counts | CREATE TABLE `Counts` ( `id` bigint NOT NULL, `count` int NOT NULL, PRIMARY KEY (`id`), KEY `count_i` (`count`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci | INSERT…
Postgresql query: update status of limit number of records based on group size
I have a postgresql table contains a list of email addresses. The table has three columns, Email, EmailServer (e.g., gmail.com, outlook.com, msn.com, and yahoo.com.ca etc.), and Valid (boolean). Now, I want to group those emails by EmailServer and then update…
SQL get result and number of rows in the result with LIMIT – Mysql
I have a large database in which I use LIMIT in order not to fetch all the results of the query every time (It is not necessary). But I have an issue: I need to count the number of results.…
docker-compose does not set CPU limit – Debian
I want to set a CPU limit on a container in a docker-compose file. When I execute the following: docker run -d --rm --cpus 0.3 --name aaa progrium/stress -c 8 -t 20s The container is taking 30% of a core…
Mysql – How to apply limit on sequlize table rows number?
I want to apply limit on Sequelize table declaration. This would actually limit the rows total of the table to 1 by forbidding to add more rows into it. How can I achieve this in the table model definition?
Postgresql – Remix, prisma, Postgres, querying the database FATAL: sorry, too many clients already
Ok, so i got in to this problem running query in my app based on: Remix app framework Postgres as a db Prisma as ORM I have simple loader function, which basically loads post types from my db. So, after…
How to set limit to change photo profile only once a day in android programmatically?I use firebase
Fragment_profile @Override public void onClick(View v) { final int id = v.getId(); if (id == R.id.layoutCameraGallery) { openImageCropper(); } } private void openImageCropper() { try { fileUri = null; imgUri = null; List<PowerMenuItem> list = new ArrayList<>(); list.add(new PowerMenuItem(getString(R.string.strGallery), R.drawable.ic_popup_gallery));…
Count API Requests to external API with Laravel
I've been trying to solve a problem with external service that has a rate limiter. My Laravel app will be doing regular requests via jobs. Users also can interact with the external service. This means that jobs requests + users…
Ubuntu – Optimized Postgresql like and group by clause
Database: PostgresSQL PostgreSQL 12.11 (Ubuntu 12.11-0ubuntu0.20.04.1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0, 64-bit RAM : 8 GB Processor : i7 4510U (dual core 2 Ghz) I would to like to optimized below query select a.gender from "employees" as…