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在shell里拼CONCAT真的是太恶心了，逗号要转义，引号要转义。而且转义出来的东西也不一定靠谱。 |
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中文问题，建议去ask.selectdb.com去问问题 |
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selectdb我也提问了 |
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找了各种文档，也没找到类似的例子。官网上只给了列之间做四则运算的写法，对字符串拼接也没举例。
这种情况下，应该使用column_u=CONCAT(a,"",b,"",c)，还是简单的加减就行了？
shell调用curl里面各种转义字符写的恶心，试了好几种都不成功。
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