sql 查询表明中的 点。。。是啥

SELECT studentID,passFlag,branchID,studentType,studentName,sex,cardType,cardNumber,to_char(regDate,'yyyy-mm-dd') regDate,regStatus,selectRequiredQty,selectMajorQty,selectElectiveQty,passRequiredQty,passMajorQty,passElectiveQty,getRequiredScore,getMajorScore,getElectiveScore,balance,to_char(depositDate,'yyyy-mm-dd') depositDate,to_char(availableDate,'yyyy-mm-dd') availableDate,studyTimeCnt,studyStatus,to_char(firstLearn,'yyyy-mm-dd hh24:mi:ss') firstLearn,to_char(lastLearn,'yyyy-mm-dd hh24:mi:ss') lastLearn 
        FROM shgb_v7.pubStudentCurrent 
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其实代码不用看 想问下 这里的 shgb_v7.pubStudentCurrent  中 这里的点是什么东西啊 这个表我在pldevlop中查不到 但是我查pubStudentCurrent  可以