Web Reference: 1 day ago · SQLAlchemy uses the Subquery object to represent a subquery and the CTE to represent a CTE, usually obtained from the Select.subquery() and Select.cte() methods, respectively. To select data from a table via SQLAlchemy, you need to build a representation of that table within SQLAlchemy. If Jupyter Notebook's response speed is any indication, that representation isn't filled in (with data from your existing database) until the query is executed. For both Core and ORM, the select() function generates a Select construct which is used for all SELECT queries. Passed to methods like execute() in Core and execute() in ORM, a SELECT statement is emitted in the current transaction and the result rows available via the returned Result object.
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