PNG文件大小如何压缩

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select * from tbl_Articles WHERE ArticleID=1313254 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1313254 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1313254 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(336810,379115,180921,2902921,1126630,1752057,158982,3353919,1126548,1559059,872315,1293723,1066238,1827433,1090537,199325,1052195,3165674,1079255,1093266,314207,1096837,1073302,489278,1543776,1518909,905029,1554430,1448883,845956) ORDER BY field (ArticleID,336810,379115,180921,2902921,1126630,1752057,158982,3353919,1126548,1559059,872315,1293723,1066238,1827433,1090537,199325,1052195,3165674,1079255,1093266,314207,1096837,1073302,489278,1543776,1518909,905029,1554430,1448883,845956)