146 questions
From test_db.jsp to test_db.java display works well, but the results do not reflect after that.I am using Eclipse ver.2019-03 (4.11.0).I look forward to hearing from you.test_db.jsp<%@pagelanguage=...
The service on the web basically requires logging in with your email address and password.However, social games on smartphones were only required to enter nicknames, and subsequent logins seemed to be...
CREATE TABLE `users`( `id`CHAR(36) NOT NULL, `tenant_id`CHAR(36) NOT NULL, `email_address`VARCHAR(254) NOT NULL, PRIMARY KEY(`id`), INDEX`email_idx`(`email_address`ASC))In the case of the above table,...
How do I verify that my email address is already registered in Firebase Authentication?The language is Kotlin
I'm studying computer configuration and design.The computer has primary and auxiliary memory, each of which consists of SRAM&DRAM, and magnetic disks.Because the main memory is an electrical syste...
What I want to know is the difference between rake db:schema:load. *rake db:migrate and rake db:reset I already know the difference, but I wrote it down just in case what I knew was wrong
Hello, I'm a little weak with Database.The query can be written to some extent, but the index seems to be still lacking. People often say that if you put a lot of indexes on one table, the performance...
Hello. Like Kakao Talk, we are implementing a chat that shows the past conversation when you look up while looking at the recent conversation.SELECT * FROM chat WHERE user_id = user ID order by chat_i...
I'm trying to use insert all. insert allinsert ANIMAL values('dog', 'a001', 'Y')insert ANIMAL values('dog', 'a002', 'Y')select 1 from dual;No, more than one update cursor can be used on a table.Is it ...
I'm a beginner at Python.I'd like to add a database module (mysql) and do this and that. https://pypi.python.org/pypi?%3Aaction=search&term=mysql&submit=searchIf you look here, you can see a l...
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