向量a在向量b上的投影怎么求

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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1064553,1106078,1071169,1109040,1053584,1063181,1050647,1094442,1091952,1048360,1078979,1091735,1086394,1073846,1083289,1086348,1275376,1096068,1046772,1125107,1095624,1044649,1092920,1046963,1073088,1070578,1097415,1109372,1063021,1063551) ORDER BY field (ArticleID,1064553,1106078,1071169,1109040,1053584,1063181,1050647,1094442,1091952,1048360,1078979,1091735,1086394,1073846,1083289,1086348,1275376,1096068,1046772,1125107,1095624,1044649,1092920,1046963,1073088,1070578,1097415,1109372,1063021,1063551)