I've got sql database table which looks like this: login time_start name1 17:30:00 name2 18:15:00 name3 16:30:00 name2 17:30:00 And i want to convert it into array with hour as id associated with all logins coresponding to that hour: Array…
Q: At present, I have the ID of table_b. How can I query the data corresponding to table_a? table_a id value 1 a1 2 a2 3 a3 table_b id table_a_ids 1 [1, 2] 2 [2, 3] It's not effective select…
I would like to know how to sort values in mysql query. I have a table tasks and has column cost which can have null or number values other column status have 2703, 2702, 2701 Based on condition, the order…
I know that a deterministic ORDER BY is when you sort by a UNIQUE INDEX column, 1) is this true?. I want to sort by the columns name and percentage. There is a possibility that 2 or more students have…
SELECT team_name, (CASE WHEN `assignment` = 'Appeal/Recon/Claim Review' THEN `done` ELSE 0 END) AS 'Appeal', (CASE WHEN `assignment` = 'IDR' THEN `done` ELSE 0 END) AS 'IDR' FROM operation_assignments WHERE serial = 6 GROUP BY team_name $collections = DB::table('operation_assignments') ->select(…
With mySQL/MariaDB you can define your own function for the SQL server (mySQL-manual). If you create such a function it is available in later queries (until it is dropped / server reset? / only for that user? / ...) As…
I am learning Laravel. I need your help for the following case. I have created 3 tables names users, posts, post_likes. Each Table contains fields as mentioned below. 1. users table -- id, username,profile_pic,email (id is the Primary key) 2.…
I am creating an Invoice System in PHP and MySQL. What I want is for the user to be able to select a product in a drop down field and the price of that product should be fetched from database…
so i want to create an event, which inserts values into Daily_Profit based on values from transaction. so I have used this syntax to get a unique value and hope there will be no duplication ALTER TABLE Daily_Profit ADD UNIQUE…
I am facing a java.lang.ClassNotFoundException error with the message com.mysql.cj.jdbc.Driver when attempting to run my Java code for data insertion into a MySQL database. Surprisingly, the code compiles and runs without any errors, but the data is not being inserted…