The UNION operation repeats this step until the SHIP buffer is empty.

UNION操作符重复这个步骤，直到ship缓冲区为空。

youdao

A useful scenario is to use a UNION ALL view to model a merger, where each branch of the UNION ALL operation represents data from a branch or division of a company.

一个有用的场景是使用UNION ALL视图来为合并建模，其中UNION ALL操作的每个分支表示来自一个分公司或公司某部门的数据。

youdao

The original join operation between the two UNION ALL views has now turned into a UNION ALL operation of eight JOIN operations.

初始的两个 UNION ALL 视图之间的连接操作现在变成了 8 个 JOIN 操作的一个 UNION ALL 操作。

youdao

He described Union cooperation in Africa, including the deployment of two military operations in the Democratic Republic of the Congo and one in Chad, as well as a naval operation off the coast of Somalia and assistance for the African Union operation and the Transitional Federal Government in the country.

UN: Security Council

The last time I was here, we were embedded in the Green Zone security bubble of the African Union peacekeeping operation at the edge of the Somali capital, with its Ugandan and Burundian troops, its heavy mortars and armoured convoys.

BBC: Welcome to tough, unpredictable Mogadishu

Roddick said merging the players' union and tournament operation under the ATP umbrella, which took place in 1990, has not benefited players as expected.

BBC: Nadal & Roddick query tour length