到底什么叫做级联

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select * from tbl_Articles WHERE ArticleID=334705 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=334705 LIMIT 0,1
select * from tbl_Articles_sphinx where id=334705 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1083341,1084673,1061832,1085942,1052121,1067769,1077310,1077890,1072903,1077525,1081441,1080078,1091843,1078863,1065019,1098219,1056152,1132355,1075714,1073076,1078414,1075777,1048788,1081123,1061830,1061534,1067115,1066564,1065359,1077100) ORDER BY field (ArticleID,1083341,1084673,1061832,1085942,1052121,1067769,1077310,1077890,1072903,1077525,1081441,1080078,1091843,1078863,1065019,1098219,1056152,1132355,1075714,1073076,1078414,1075777,1048788,1081123,1061830,1061534,1067115,1066564,1065359,1077100)