How long it will take?

来源: gaogaoxingxing06 于 2011-01-13 12:17:05 [] [旧帖] [给我悄悄话] 阅读数 : (150 bytes)
回答: 回复：改行请教老土 由 美国老土 于 2011-01-13 07:33:10

How long does it take to learn the database skills? Do I need to get some certificate? How much fee for the courses? Please check QQH. Thanks!!

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