单引号有什么作用

页面:/news/view-1093660/ | 耗时:0.1918 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=1093660 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1093660 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1093660 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(502318,1085127,2009998,506060,745669,1031298,449131,473986,2336989,1091029,2507224,3312611,961564,1048355,1989472,506366,2293328,922575,614531,1298096,1162499,646606,1159164,1092280,1063534,2548774,2146147,1166814,614237,2052765) ORDER BY field (ArticleID,502318,1085127,2009998,506060,745669,1031298,449131,473986,2336989,1091029,2507224,3312611,961564,1048355,1989472,506366,2293328,922575,614531,1298096,1162499,646606,1159164,1092280,1063534,2548774,2146147,1166814,614237,2052765)