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Oracle中MERGE INTO用法详解
Oracle中merge into语句用于合并插入与更新操作。 1、 merge into 用于更新或插入数据,若目标表中已存在匹配记录则执行更新,否则执行插入操作。以下面两张表为例进行说明。 2、 merge into语句用于合并数据。 3、 将数据合并到指定表中并设置别名 4、 在SQL语句中 ...
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