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作业打卡

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丶IF73666

#1 Created at ... [Delete] [Delete and Lock User]

StringJoiner sj = new StringJoiner(", ","SELECT "," ");

        for(String name : fields){

           sj.add(name);

        }

        StringBuilder sb = new StringBuilder(1024);

        sb.append(sj.toString()).append("FROM ").append(table);

        return sb.toString();


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