汽车仪表上显示KEY是什么意思?

页面:/news/view-964917/ | 耗时:0.0887 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=964917 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=964917 LIMIT 0,1
select * from tbl_Articles_sphinx where id=964917 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(3431924,1086996,1055501,1030270,468186,1658396,1157251,628393,749480,3312029,925520,1040244,1103661,1113765,1656222,552055,1157789,3309358,548558,663935,618669,3079256,1275212,1938181,409859,1133745,615837,3009585,1119130,397669) ORDER BY field (ArticleID,3431924,1086996,1055501,1030270,468186,1658396,1157251,628393,749480,3312029,925520,1040244,1103661,1113765,1656222,552055,1157789,3309358,548558,663935,618669,3079256,1275212,1938181,409859,1133745,615837,3009585,1119130,397669)