I am trying to build a report based of my table. Here is my table: Following is the SQL query to get desired results. I am looking to exclude entries which have all null values and following is my syntax but it is not working and produces the same results. Kindly help here or share a post that can help.
Tag: mariadb
Mysql / Maridb Python Connector is not loading data into table
The code checks if there is a table with the same name in the db and then potentially drops it, creates a new table and loads the data of the csv file into the table. When executing the code it seems like everything is working but when going in the mariadb command prompt the created table is empty even though
Laravel/MariaDB: errno 150 “Foreign key constraint is incorrectly formed”
I’m on Laravel 5.4, PHP 5.6, Ubuntu 18.04, MariaDB 10.4.8. When I run php artisan migrate, I get: I’m trying to use https://github.com/klisl/laravel-comments. Before trying to perform a migration with this package I had created DB at phpMyAdmin, had configured .env by adding DB name and stuff, had…
PYTHON – Dynamically update multiple columns using a custom MariaDB connector
While reading this question: SQL Multiple Updates vs single Update performance I was wondering how could I dynamically implement an update for several variables at the same time using a connector like MariaDB’s. Reading the official documentation I did not find anything similar. This question is similar…
How to use a SQL keyword NOT as a keyword
I am trying to transform a table of data–I want the rows to become the columns, and the columns to become the rows (like a total complete pivot). I am using the method from this answer to do so. If it makes any difference, I am running my own SQL server on a Raspberry Pi using PHPMyAdmin. The table (tru…
Multiple full joins in one query on multiple tables
I have a database with multiple tables, I wish to show all contents from every table with one query (that I will use later for a research in the database). view of the database I’ve tried with two tables but it returns an error. I’m using 10.4.14-MariaDB version. full join query error Answer One m…
Select records within 5 kilometers with group by
I have an application that uses coordinates. I want to select records within 5 km that were thrown in the last 5 minutes. How can I do this easiest? I want to write a procedure. The values I will send to the procedure are latitude (float 11,8) and longitude (float 11,8). Example table: I found a query like th…
SELECT statement across multiple tables
First off, I am not an SQL coder. I am trying to select information from 2 different tables in the same database. Table 1 is called trans and has 3 columns: Table 2 is called cust and has multiple columns: The SELECT statement that I’m trying to write will pull data from both tables. I THINK I need to u…
SQL field does not have a default value – Even though field is set to default NULL
I have an older SQL database that I am trying to use, I am not sure of the version it was originally built for but I am trying to use it with Maria 10.2 table1 looks like this… And I am trying to write a firstname to it with a prepared statement like this… I am getting an SQL error…..
How does page overflow with columns (InnoDB) work in MySQL?
The documentation says: “Whether columns are stored off-page depends on the page size and the total size of the row.” 1.- This means that if I have a page size of 16KB, the maximum size of the row would be 8KB, therefore, if I have 4 columns, will the maximum size of each column be 2KB (approximat…