insert...on duplicate key update
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insert...on duplicate key update语法详解
目录一.作用和使用场景二.例子详细讲解一.作用和使用场景 在mysql入库时,不能出现两条数据主键一致的情况,因为在两条数据的主键一致的情况下,mysql就会判定为待插入数据在数据库中存在重复数据,也就是说判断数据[详细]
2023-01-10 09:04 分类:数据库 File descriptor limits and default stack sizes
Where I work we build and distribute a library and a couple complex programs built on that library.All code is written in C and is available on most \'standard\' systems like Windows, Linux, Aix, Sola[详细]
2022-12-21 05:12 分类:问答