I experimented if non-repeatable read and phantom read occur or not with SERIALIZABLE on MySQL but against my expectation, both non-repeatable read and phantom read actually occurred with SERIALIZABLE. These below are the definitions of non-repeatable read and phantom read:…
CREATE TABLE products ( id int not null auto_increment PRIMARY KEY, Name varchar(30) not null, Reliability int default 0, date timestamp default now(), expiration timestamp default (now()+31536000) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4; I'm trying to add an expiration date for products…
I have a table with the following columns: ClientID, Amount, etc. The problem is that some clients have two or more rows with Amount = 0, and I want to remove these rows. I've searched some information but only found…
This is the table I am working with: +---------------------+----------- | Field | Type | +---------------------+--------------+ | ID | binary(17) | | MiscSensor_ID | binary(17) | | rawValue | varchar(100) | | RawValueUnitType_ID | int | | timestamp | timestamp |…
Newbie here having trouble wiring up some tables for a game's leaderboard. Would appreciate help! I have 3 tables; here's an ER diagram: ┌─────┐ ┌─────┐ │ IPs ├─||─────────────────|<─┤Names│ └──┬──┘ └──┬──┘ │ │ │ │ │ │ │ │ │ │…
I have a database MySQL 8.0 with 12 tables (one of each month) with information about clients. All tables have a Client ID and the amount of money that they save. For example, for two months: +------------------+ + January +…
I'm trying to figure out a way to make the rank() window function "skip" in its counting some rows with null values in a specific column. Pretty much, what I want is to count how many paid transactions there are,…
My operating system is Linux. I am going to connect Superset to PostgreSQL. PostgreSQL port is open and its value is 5432. PostgreSQL is also running and not closed. Unfortunately, after a day of research on the Internet, I could…
CREATE TABLE wishlist( year YEAR NOT NULL, ssn CHAR(14), delivered BIT, PRIMARY KEY (year, ssn), FOREIGN KEY (ssn) REFERENCES child (child_ssn) ) engine=innodb; CREATE TABLE wishlistDelivered( year YEAR NOT NULL, ssn CHAR(14), delivered BIT, PRIMARY KEY (year, ssn), FOREIGN KEY…
I can't find answers to my question so I'm doing it. My site's database occupies 10.9 Gb of which 10.5 is the woocommerce_log folder, what can I do?? Can older logs be deleted? Is there a problem with the configuration?