Add SQL Structure

[frommMoritz]

It would be nice to have an database.sql containing and structural dump of the Table used in writeToDatabase.php.

[frommMoritz]

I've created a table that seems to be working. @f2k1de would you mind to check that real quick, then I'd create a PR with it.

-- phpMyAdmin SQL Dump
-- version 4.8.5
-- https://www.phpmyadmin.net/
--
-- Host: 127.0.0.1
-- Generation Time: Jan 27, 2020 at 09:29 AM
-- Server version: 10.1.41-MariaDB-0+deb9u1
-- PHP Version: 7.3.12-1+0~20191128.49+debian9~1.gbp24559b

SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
SET AUTOCOMMIT = 0;
START TRANSACTION;
SET time_zone = "+00:00";

--
-- Database: `blahaj`
--

-- --------------------------------------------------------

--
-- Table structure for table `sharks`
--

CREATE TABLE `sharks` (
  `id` int(11) NOT NULL,
  `markt` int(4) NOT NULL,
  `date` datetime NOT NULL,
  `number` int(11) NOT NULL,
  `size` varchar(10) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

--
-- Indexes for dumped tables
--

--
-- Indexes for table `sharks`
--
ALTER TABLE `sharks`
  ADD PRIMARY KEY (`id`);

--
-- AUTO_INCREMENT for dumped tables
--

--
-- AUTO_INCREMENT for table `sharks`
--
ALTER TABLE `sharks`
  MODIFY `id` int(11) NOT NULL AUTO_INCREMENT;
COMMIT;