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sql-smith is an SQL query builder with zero dependencies and a fluent interface.

Project description

sql-smith is an SQL query builder with zero dependencies and a fluent interface.

The sentence above is, beside the name, a copy from the website of the PHP library Latitude, for the simple reason that this Python module is a port of Latitude.

Installation

$ pip install sql-smith

Quick Start

QueryFactory is a factory to create a SELECT, INSERT, UPDATE or DELETE query. Use the fluent interface of the queries to complete the query.

from sql_smith import QueryFactory
from sql_smith.engine import CommonEngine
from sql_smith.functions import field

factory = QueryFactory(CommonEngine())
query = factory \
    .select('id', 'username') \
    .from_('users') \
    .where(field('id').eq(5)) \
    .compile()

print(query.sql)  # SELECT "id", "username" FROM "users" WHERE "id" = ?
print(query.params)  # (5)

When the query is ready, compile it. The return value of compile is a Query class instance with two properties: sql and params. Use these properties to pass the query to a database.

import sqlite3

db = sqlite3.connect('test.db')
cur = db.cursor()

for row in cur.execute(query.sql, query.params):
    print(row)

Project details


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