举例说明什么叫针对性

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select * from tbl_Articles WHERE ArticleID=2779508 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2779508 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2779508 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1078414,1045471,1078182,1080375,1059801,1070764,1061282,1069992,1071203,1093787,1077370,1054358,1080913,1049548,1077100,1070614,1048945,1057607,1076267,1059368,1055718,1072577,1082055,1081819,1063717,1072314,1050437,1045697,1101641,986890) ORDER BY field (ArticleID,1078414,1045471,1078182,1080375,1059801,1070764,1061282,1069992,1071203,1093787,1077370,1054358,1080913,1049548,1077100,1070614,1048945,1057607,1076267,1059368,1055718,1072577,1082055,1081819,1063717,1072314,1050437,1045697,1101641,986890)