+----------------+--------------+------+-----+---------+-------+
|     Field      |     Type     | Null | Key | Default | Extra |
+----------------+--------------+------+-----+---------+-------+
| item_name      | varchar(255) | NO   |     | NULL    |       |
| item_link      | varchar(50)  | NO   | PRI | NULL    |       |
| item_price     | varchar(10)  | NO   |     | NULL    |       |
| shop_name      | varchar(40)  | NO   | MUL | NULL    |       |
| sales          | int(11)      | NO   |     | NULL    |       |
| sale_date      | varchar(10)  | NO   | PRI | NULL    |       |
+----------------+--------------+------+-----+---------+-------+

key_buffer = 16M
max_allowed_packet = 16M
sort_buffer_size = 8M
net_buffer_length = 8K
read_buffer_size = 2M
read_rnd_buffer_size = 16M
myisam_sort_buffer_size = 8M
log_error = "mysql_error.log"
innodb_autoinc_lock_mode=0
join_buffer_size = 8M
thread_cache_size = 8
thread_concurrency = 8
query_cache_size = 64M
query_cache_limit = 2M
ft_min_word_len = 4
thread_stack = 192K
tmp_table_size = 64M

innodb_buffer_pool_size = 1.5G
innodb_additional_mem_pool_size = 16M
innodb_log_file_size = 350M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 120
innodb_write_io_threads = 8
innodb_read_io_threads = 8
innodb_thread_concurrency = 16
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90

SELECT item_name,
       item_link,
       item_price,
       shop_name,
       sales
FROM   `sales`
WHERE  sale_date = '2019-04-18'

SELECT item_name,
       item_link,
       item_price,
       shop_name,
       Sum(sales) AS sales
FROM   `sales`
WHERE  sale_date BETWEEN '2019-04-17' AND '2019-04-18'
GROUP  BY item_link