mysql

问题 I have a database containing the following tables: - product (product_id / name / price / image_id / description) - order ( order_id / date / status / email ) - order_count ( order_id / product_id / number ) - image (image_id / image_link ) I'd like to show the 3 most sold products on my homepage, but can't wrap my head around doing this. I tried this: $sql = "SELECT" * FROM 'product' INNER JOIN 'afbeelding' WHERE 'product'.'image_id' = 'afbeelding'.'image_id' GROUP BY 'product_id' ORDER BY

问题 How do I subtract row 1 from row 2 and row 2 from row 3, etc. in MySQL? The table i am pulling my data from contains multiple products and all products have multiple prices (on different dates) The code i am working with: SELECT orderline_sales.product_name, orderline_sales.price FROM orderline_sales GROUP BY price HAVING orderline_sales.product_name = 'Ibuprofen'; The result I am getting: |---------------------|------------------| | product_name | price | |---------------------|-------------

问题 I have a table named 'fact' with title column, that should be full text index. Firstly, I add a full text index: ALTER TABLE fact ADD FULLTEXT title_fts (title) So, I insert row: INSERT INTO fact (id, title) VALUES ('1', 'red blue yellow ok green grey ten first wise form'); And then I perform search: select * from fact f where contains (f.title, '"red" or "blue"') When I perform the following query, or any other query with 'contains' statement, I get emtpy result set: I have to use this

问题 I have a table named 'fact' with title column, that should be full text index. Firstly, I add a full text index: ALTER TABLE fact ADD FULLTEXT title_fts (title) So, I insert row: INSERT INTO fact (id, title) VALUES ('1', 'red blue yellow ok green grey ten first wise form'); And then I perform search: select * from fact f where contains (f.title, '"red" or "blue"') When I perform the following query, or any other query with 'contains' statement, I get emtpy result set: I have to use this

问题 I'm just trying to make operation which looks pretty simple but getting a strange error Uncaught exception: 'PDOException' Message: 'SQLSTATE[HY000]: General error: could not call class constructor' Stack trace: 0 C:\xampp\htdocs\hotel\Core\Model.php(48): PDOStatement->fetch() 1 C:\xampp\htdocs\hotel\App\Controllers\Admin\Rooms.php(188): Core\Model::findById('98')*** 2 C:\xampp\htdocs\hotel\Core\Router.php(78): App\Controllers\Admin\Rooms::deletePhoto() 3 C:\xampp\htdocs\hotel\public\index

问题 I'm using MySQL with phpMyAdmin , below is my data table: +--------+---------+-----------------+ | userID | context | time | +--------+---------+-----------------+ | 111 | | 7/1/2021 | | 111 | | 7/16/2019 | | 111 | Reset | 7/15/2019 | | 222 | | 7/9/2020 | | 222 | Reset | 7/8/2020 | | 333 | Reset | 5/11/2020 | | 333 | | 5/10/2020 | | 444 | | 9/8/2020 | +--------+---------+-----------------+ I'm looking for a SELECT query that gives me the MIN time greater or equal to the date where a Reset is

问题 I'm new to Django, and trying to setup a basic web-app connecting to MySQL on macOS. However, I can't seem to get mysqlclient to work on macOS. I'm running a virtual environment and the following versions: $ brew --version Homebrew 1.8.5 $ pip --version pip 18.1 $ python --version Python 3.7.1 $ mysql --version mysql Ver 8.0.12 for osx10.14 on x86_64 (Homebrew) When I try pip install mysqlclient (https://pypi.org/project/mysqlclient/) I get ld: library not found for -lssl clang: error: linker

问题 I've gotten some good help on here with some tricky stuff like this, so thought I'd have you guys take a look and see if this is even possible. I have two tables in MySQL .. company and resources ... companies can have multiple resources .. so ... company -------- companyId (primary/auto inc) companyName resources --------- resourceId (primary/auto inc) companyId resourceName I'd like to query the two tables and group it so the results look like this ... Example... Company Name ResourceName1

问题 I've gotten some good help on here with some tricky stuff like this, so thought I'd have you guys take a look and see if this is even possible. I have two tables in MySQL .. company and resources ... companies can have multiple resources .. so ... company -------- companyId (primary/auto inc) companyName resources --------- resourceId (primary/auto inc) companyId resourceName I'd like to query the two tables and group it so the results look like this ... Example... Company Name ResourceName1

问题 I am trying to write a python code which has same functionarities of AES_ENCRYPT and AES_DECRYPT of MySQL. https://dev.mysql.com/doc/refman/5.6/ja/encryption-functions.html I want to encrypt and decrypt data between MySQL and Python. For example, I want to decrypt data by python, which is encrypted by AES_ENCRYPT of MySQL. And I want to decrypt data by AES_DECRYPT of MySQL, which is encrypted by Python vice versa. I found a example of AES_ENCRYPT in Python. https://www.maykinmedia.nl/blog