sqlalchemy

问题 I have the following situation, using SQLAlchemy with a MySQL database. Assume a Person table that looks like this: +------+-----------+----------+------------+ | ID | firstname | lastname | startdate | +------+-----------+----------+------------+ | 43 | Bob | Smith | 2016-12-04 | | 873 | Mary | Jones | 2018-05-01 | | 120 | Bob | Smith | 2020-04-02 | | 339 | Bob | Jones | 2019-03-01 | | 1022 | Bob | Smith | 2015-11-21 | +------+-----------+----------+------------+ I need to generate an extra

问题 I have the following situation, using SQLAlchemy with a MySQL database. Assume a Person table that looks like this: +------+-----------+----------+------------+ | ID | firstname | lastname | startdate | +------+-----------+----------+------------+ | 43 | Bob | Smith | 2016-12-04 | | 873 | Mary | Jones | 2018-05-01 | | 120 | Bob | Smith | 2020-04-02 | | 339 | Bob | Jones | 2019-03-01 | | 1022 | Bob | Smith | 2015-11-21 | +------+-----------+----------+------------+ I need to generate an extra

问题 This question already has an answer here : CS50: LIKE operator, variable substitution with % expansion (1 answer) Closed last year . I'm trying to use wildcards for a query using SQLAlchemy but I'm getting back an empty list. My code: engine = create_engine(os.getenv("DATABASE_URL")) db = scoped_session(sessionmaker(bind=engine)) s = input("Search for a book: ") q = db.execute(f"SELECT * FROM books WHERE isbn LIKE '%\:s\%' OR author LIKE '%\:s\%' OR title LIKE '%\:s\%'", {"s": s}).fetchall()

问题 This question already has an answer here : CS50: LIKE operator, variable substitution with % expansion (1 answer) Closed last year . I'm trying to use wildcards for a query using SQLAlchemy but I'm getting back an empty list. My code: engine = create_engine(os.getenv("DATABASE_URL")) db = scoped_session(sessionmaker(bind=engine)) s = input("Search for a book: ") q = db.execute(f"SELECT * FROM books WHERE isbn LIKE '%\:s\%' OR author LIKE '%\:s\%' OR title LIKE '%\:s\%'", {"s": s}).fetchall()

问题 I'm updating Pyramid/SQLAlchemy legacy code to Python 3.8 from an app working fine under Python 2.7, and running it locally. All the necessary requirements are pip installed and setup.py runs without error. On running initialise with my local .ini file, All goes well, the database tables (MariaDB) are all written. in models.py from sqlalchemy.orm import ( scoped_session, sessionmaker, relationship, backref, synonym, ) from zope.sqlalchemy import ZopeTransactionEvents #[...] DBSession = scoped

问题 Trying to create a bigquery connector using sqlalchemy from sqlalchemy import create_engine engine = create_engine('bigquery://<project_id>/<project_name>', credentials_path=GCP_KEY) conn = engine.connect() Error: sqlalchemy.exc.NoSuchModuleError: Can't load plugin: sqlalchemy.dialects:bigquery 回答1: Your error is generally related to the lack of some required module to use SQLAlchemy. Therefore, after going though the documentation, I found out that you should install the requirements in you

问题 Trying to create a bigquery connector using sqlalchemy from sqlalchemy import create_engine engine = create_engine('bigquery://<project_id>/<project_name>', credentials_path=GCP_KEY) conn = engine.connect() Error: sqlalchemy.exc.NoSuchModuleError: Can't load plugin: sqlalchemy.dialects:bigquery 回答1: Your error is generally related to the lack of some required module to use SQLAlchemy. Therefore, after going though the documentation, I found out that you should install the requirements in you

问题 Is their any simple (fast) way to fetch a table and find the datetime nearest from a given dateTime in SQLAlchemy ? In most case the delta will be seconds between the datetime given and the one in the table. The date column is the primary key EDIT : I'm using SQLite 回答1: Since it is the primary key a simple "sort by diff ascending, fetch 1st row" might not be the fastest, though simple solution. A quick and dirty way could be to fetch a union of larger than and less than the given datetime,

问题 Is their any simple (fast) way to fetch a table and find the datetime nearest from a given dateTime in SQLAlchemy ? In most case the delta will be seconds between the datetime given and the one in the table. The date column is the primary key EDIT : I'm using SQLite 回答1: Since it is the primary key a simple "sort by diff ascending, fetch 1st row" might not be the fastest, though simple solution. A quick and dirty way could be to fetch a union of larger than and less than the given datetime,

问题 Is their any simple (fast) way to fetch a table and find the datetime nearest from a given dateTime in SQLAlchemy ? In most case the delta will be seconds between the datetime given and the one in the table. The date column is the primary key EDIT : I'm using SQLite 回答1: Since it is the primary key a simple "sort by diff ascending, fetch 1st row" might not be the fastest, though simple solution. A quick and dirty way could be to fetch a union of larger than and less than the given datetime,