evadb.EVADBQuery.select#

EVADBQuery.select(expr: str) → EVADBQuery[source]#

Projects a set of expressions and returns a new EVADBQuery.

Parameters:: exprs (Union[str, List[str]]) – The expression(s) to be selected. If ‘*’ is provided, it expands to all columns in the current EVADBQuery.
Returns:: A EVADBQuery with subset (or all) of columns.
Return type:: EVADBQuery

Examples

>>> relation = conn.table("sample_table")

Select all columns in the EVADBQuery.

>>> relation.select("*")

Select all subset of columns in the EVADBQuery.

>>> relation.select("col1")
>>> relation.select("col1, col2")