怎么权威且通俗解释大数据

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select * from tbl_Articles_data WHERE ArticleID=3113973 LIMIT 0,1
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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1115451,1079139,1120233,1062878,1042484,1069507,1094273,1096711,1095263,1133429,1111188,1106370,1108982,1062336,1099713,1062993,1092776,1122092,1106256,1095305,1127793,1109771,1050341,1071105,1087837,1106118,1128669,1068080,1068742,1126272) ORDER BY field (ArticleID,1115451,1079139,1120233,1062878,1042484,1069507,1094273,1096711,1095263,1133429,1111188,1106370,1108982,1062336,1099713,1062993,1092776,1122092,1106256,1095305,1127793,1109771,1050341,1071105,1087837,1106118,1128669,1068080,1068742,1126272)