Is the join condition you want to use for the tables 是希望对表使用的联接条件。
The join conditions in the from clause are applied 应用from子句中的联接条件。
The join conditions and search conditions from the where clause are applied 应用where子句中的联接条件和搜索条件。
A join condition defines the way two tables are related in a query by 联接条件可通过以下方式定义两个表在查询中的关联方式:
The following query contains the same join condition specified in the where clause 下列查询包含相同的联接条件,该联接条件在where子句中指定:
Clause that supplies the join conditions between the mining model columns and the input columns 子句,该子句提供挖掘模型列和输入列之间的联接条件。
Columns used in a join condition are not required to have the same name or be the same data type 联接条件中用到的列不必具有相同的名称或相同的数据类型。
A typical join condition specifies a foreign key from one table and its associated key in the other table 典型的联接条件在一个表中指定一个外键,而在另一个表中指定与其关联的键。
Join conditions can be specified in either the from or where clauses ; specifying them in the from clause is recommended 联接条件可在from或where子句中指定,建议在from子句中指定联接条件。
Where and having clauses can also contain search conditions to further filter the rows selected by the join conditions Where和having子句还可以包含搜索条件,以进一步筛选根据联接条件选择的行。