The pseudo column LEVEL can be used in the ORDER BY clause to return the result set in search breadth first sequence.

可在 ORDER BY 子句中使用伪列 LEVEL 按照搜索宽度优先顺序返回结果集。

youdao

SEARCH BREADTH FIRST is the default sequence and returns all data on the same level first before returning any data on the next level.

SEARCH BREADTH FIRST 是默认顺序，在返回下一层数据前会先返回同级的所有数据。

youdao

The underlying problem is that DB2 processes recursion by essentially producing one level of recursion at a time (breadth first), while Oracle uses depth first.

在底层，DB2 处理递归时采用的方法是逐层递归（广度优先），而 Oracle 采用的是深度优先的方法。

youdao

The two are now working on ways to make the breadth of Twitter content more visible to first-time visitors, helping them quickly discover information about stocks, sports and other topics and people they care about, people familiar with the matter have said.

WSJ: New Financing Values Twitter As High As $7 Billion

As leaders, a good first step to consider is surveying the breadth of causes your company supports with an eye towards prioritizing those that synch up well with core business needs.

FORBES: How to Put More Giving into Thanksgiving

But he is among the first to recognize its power to save lives and take advantage of the breadth of its possibilities.

NEWYORKER: The Checklist