English | 简体中文

Read full documentation at Read the Docs

MercurySQL (M.SQL)

Operate SQL in a more pythonic way.

What is it

Operate SQL database in a more Pythonic way.

• Confused by complex SQL statements?
• Lost data due to lack of commit?
• Spent hours debugging SQL in the terminal?

Don't worry, I've been there too. That's why MercurySQL was born.

MercurySQL has the following advantages ....

• More Pythonic way of operation: An API that is more in line with the Python style, making the operation of SQL databases more concise and easy to understand.
• Avoid complex SQL statements: Avoid writing complex SQL statements, thereby reducing the burden of learning and understanding SQL syntax.
• More secure database: Use safe queries, automatically commits for you, protect database security, and prevent data loss.
• Debugging with Python: You can debug and check your database in Python directly, without complext SQL debugging in terminal.

For example, it can do these things....

Create Database

SQL

CREATEDATABASEIF NOT EXISTS test;

MercurySQL

db=DataBase('test')

Create Table

SQL

CREATETABLEIF NOT EXISTS test (
id INTEGERPRIMARY KEY
);

MercurySQL

table=db['test']
table.newColumn('id', int, primaryKey=True)

Delete Table

SQL

DROPTABLE IF EXISTS test;

MercurySQL

deldb['test']

Add Column

SQL

ALTERTABLE test
ADD COLUMN name TEXT;

MercurySQL

table['name'] =str

Add Primary Key Column

SQL

ALTERTABLE test
ADD COLUMN id INTEGERPRIMARY KEY;

MercurySQL

table['id'] =int, 'Primary Key'# 'Primary Key' is case-insensitive

Delete Column

SQL

ALTERTABLE table
DROP COLUMN name;

MercurySQL

deltable['name']

Add Record

SQL

INSERT INTO test (id, name) VALUES (1, 'Bernie Huang');

MercurySQL

table.insert(id=1, name='Bernie Huang')

Query

SQL

SELECT*FROM test WHERE id=1AND name='Bernie Huang';

MercurySQL

rec=table.select(
(table['id'] ==1) & \
(table['name'] =='test')
) # rec = [{'id': 1, 'name': 'Bernie Huang'}]

Delete Record

SQL

DELETE*FROM test WHERE id=1AND name='Bernie Huang';

MercurySQL

((table['id'] ==1) & (table['name'] =='test')).delete()

Dependencies:

• sqlite3 (for Driver_SQLite, comes with Python)

  So ... no dependencies!

---

Why is it called MercurySQL

(===== The following is just some fun speculation by ChatGPT, don't mind it =====)

Speed and Agility: Mercury is the messenger god in ancient Roman mythology, and is synonymous with speed and flexibility. By putting "Mercury" in the name of the library, you might want to convey the speed and agility of this library when handling SQL databases.

Lightweight: Mercury is a relatively light metal, which may indicate that your library is designed to be lightweight, suitable for resource-sensitive environments such as embedded systems or mobile devices.

Fluidity: Mercury is a liquid metal at room temperature, with good fluidity. This may symbolize that your library provides a smooth API, making operations on SQL databases more flexible and easy.

Accuracy: Under temperature changes, mercury shows a stable volume, which makes it widely used in thermometers. This may indicate that your library is accurate and stable when handling data, with good reliability.

Chemical Stability: Mercury is a chemically stable element and does not easily react with other elements. This may mean that your library is stable and not prone to conflicts when integrated with other Python libraries or frameworks.