大于号小于号怎么区分

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select * from tbl_Articles WHERE ArticleID=2373337 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2373337 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2373337 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(394502,391681,87060,528330,505421,3239024,385855,439794,504021,437911,436048,2592778,467352,382572,499487,474880,532310,474362,138071,445343,1065716,128497,2170806,3236000,476073,757549,2870163,3145704,500568,471330) ORDER BY field (ArticleID,394502,391681,87060,528330,505421,3239024,385855,439794,504021,437911,436048,2592778,467352,382572,499487,474880,532310,474362,138071,445343,1065716,128497,2170806,3236000,476073,757549,2870163,3145704,500568,471330)