MERGE INTO 目标表 USING 用法批量新增或修改（可用于覆盖）

attention：sql 批量新增时若是是两条彻底重复数据，该sql仅新增一条。oracle 若仅主键重复，则报错。app oracle:it merge into table t usingio (table select ? col1, ?  col2 ... from dualdate union select ? col1, ?  col2 ... from dualforeach ..

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