In this example, a single merge is used instead of having three successive merges added to the model.
此示例使用单个merge，而不是在模型中添加三个连续的merge。
Of course you can always use explicit EXISTS predicates and the MERGE statement with a single row, and both will have similar performance.
当然，可以总是对单行使用显式exists谓词和merge语句，两者将获得相似的性能。
Of course, you can change the names of the targets or merge these three tasks into a single target if you prefer.
当然，如果您愿意的话，还可以改变目标任务的名称，或者将这三项任务合并为一个目标任务。
应用推荐