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关于sql语句中表明简写有关问题

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Release: 2016-06-13 12:31:56
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关于sql语句中表明简写问题
比如SELECT * FROM djs_update_class 。
查询多条数据的时候好烦人啊。。
我看别人写成SELECT * FROM A。
这么写的原因是什么?具体的写法呢?
我问他们有人说这要写个数组。。总感觉这么说太牵强,你不能在mysql中写数组吧。。。
如果我也想这么写要不要下载什么插件啥的啊?
求指点下。

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