位子和位置的区别

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select * from tbl_Articles WHERE ArticleID=3423482 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3423482 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3423482 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1571721,2273828,869703,87626,1105947,1185411,1089175,3010760,625912,1119318,627629,408450,1200282,1363400,429079,3239813,1183015,1213558,734617,3523828,1023276,1187713,855473,882006,1185500,360196,1350857,805634,1541111,427537) ORDER BY field (ArticleID,1571721,2273828,869703,87626,1105947,1185411,1089175,3010760,625912,1119318,627629,408450,1200282,1363400,429079,3239813,1183015,1213558,734617,3523828,1023276,1187713,855473,882006,1185500,360196,1350857,805634,1541111,427537)