In other words, schemas are not the equivalent of SQL column constraints.

换句话说，模式并不等同于sql列约束。

youdao

Note: This is equivalent to selecting a database column in the where clause of a SQL statement.

注意：这相当于在sql语句的where子句中选择一个数据库列。

youdao

Note that for a DAG represented in Matrix, shifting position of entire row or entire column still makes the representation equivalent.

注意，一个DAG表示为矩阵，移位置的整行或整列仍然是等效的表示。

youdao

The economists' slang for this kind of policy is the creation of "helicopter" money, because it is seen as the equivalent of dropping money on all of us from out of a helicopter ( see this column by Simon Jenkins for more on this).

BBC: Turner: Time for helicopter money?