625 questions
Hello, let me ask you a question.I am re-pasting the index of a table.table_name_login_idx btree(login) WHERE sex='m':bpcharWhat does this :bpchar mean?Sex is character(1).Please give me guidance.
I don't know how to combine tables of different databases in the same server using PDO class, so I would appreciate it if you could give me some advice.The development language is PHP and the database...
If you have the following data:If the parent id is the same and the amount is NULL, you can rewrite it to something that is not NULL.What should I do?I look forward to hearing from you.From this state...
I would like to have my new Rails project run on DockerToolbox.The Rails version is 4.0.0.#...set up abbreviated Docker Toolbox...$ git clone path /to /repository.git project$ cd project# Install gem$...
What I want to do in the end is I want to make a table of normal distribution cumulative functionsIn order to do this, Error function must be calculated.There's a factorial calculation in it, but it's...
■ What you want to do (overview): After accessing a URL without a query parameter, I want to automatically skip it to the URL with the query parameter attached.■ What you want to do (details): 1. Curr...
When I delete a post model record, I want to delete a comment model record associated with it, but I get the following error.Currently, if there is no comment, it can be deleted normally.If anyone und...
Hello, I'm a beginner at cake.I have a question because I am stuck with the query settings.Here's what you want to do:Displays the most recent date of the month.I am writing a custom query as follows:...
Unable to connect to MySQL remotely.We have two AWS lightsail instances (Ubuntu 14.04.5) and are trying to connect from one to the other.Both versions of MySQL are 5.6.35.The last thing I want to do i...
RubyonRails implements the process of aggregating (by time) articles.Currently, I would like to run SQL such as the following, save the aggregated results to DB, and display them on the web screen.SQL...
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