patito.Database.query

Database.query(query, alias='query_relation')

Execute arbitrary SQL select query and return the relation.

Parameters

• query (str) – Arbitrary SQL select query.

• alias (str) – The alias to assign to the resulting relation, to be used in further queries.

Returns: A relation representing the data produced by the given query.

Example

>>> import patito as pt
>>> db = pt.Database()
>>> relation = db.query("select 1 as a, 2 as b, 3 as c")
>>> relation.to_df()
shape: (1, 3)
┌─────┬─────┬─────┐
│ a   ┆ b   ┆ c   │
│ --- ┆ --- ┆ --- │
│ i64 ┆ i64 ┆ i64 │
╞═════╪═════╪═════╡
│ 1   ┆ 2   ┆ 3   │
└─────┴─────┴─────┘

>>> relation = db.query("select 1 as a, 2 as b, 3 as c", alias="my_alias")
>>> relation.select("my_alias.a").to_df()
shape: (1, 1)
┌─────┐
│ a   │
│ --- │
│ i64 │
╞═════╡
│ 1   │
└─────┘

Return type

Relation