1·Mapping subquery and aggregate functions
映射子查询和聚合功能
2·Instead of using subquery, we join two tables directly.
我们直接将两个表连接在一起，而不再使用子查询。
3·Often a subquery can substitute a temporary table.
通常一个子查询可以代替一个临时表。
4·Subquery with more than one result column not valid.
说明：具有多个子查询结果列无效。
5·This statement is represented in the example as subquery S1.
这个语句在示例中表示为子查询s1。
6·There are not enough columns in the subquery select list.
子查询选择列表中没有足够的列。
7·There are not enough columns in the subquery select list.
选择包含键列的表，然后选择键列。
8·When this statement is executed, the subquery is evaluated first.
当这条语句执行的时候, 子查询会先执行.
9·Is a in subquery matching multiple columns possible in JPQL?
是一个在子查询匹配多个列可能在JPQL ？
10·A subquery is executed by enclosing it in a set of parentheses.
子查询是被包含在一组圆括号里执行的。
1·DB2 can then choose to perform the join or subquery at the database partition where the data is stored, instead of having to move data between database partitions.
于是DB 2就可以在存储数据的数据库分区上执行连接或子查询，而不必在数据库分区之间移动数据。
2·The last section also describes the ALL, EXISTS, and SOME or ANY predicates, which can be used to express conditions on subquery results.
最后一节还描述了 ALL、EXISTS 和 SOME 或 ANY 谓词，这些谓词可用于表达子查询结果上的条件。
3·This statement is represented in the example as subquery S1.
这个语句在示例中表示为子查询s1。
4·The subquery in this statement is absurdly simple, and completely unnecessary, but it does serve to illustrate a point.
这个子查询非常简单，并且完全没有必要，但是它能说明一点。
5·Instead of using subquery, we join two tables directly.
我们直接将两个表连接在一起，而不再使用子查询。