设施栽培的作用有育苗、早熟栽培()、()、()、()、()、()。
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YourcompanyusesSQLServer2005.Youareimplementingaseriesofviewsthatareusedinadhocqueries.Theviewsareusedtoenforceyourcompanyssecuritypolicyofabstractingdata.Someoftheseviewsperformslowly.Youcreateindexesonthoseviewstoincreaseperformance,whilestillmaintainingthecompanyssecuritypolicy.Oneoftheviewsreturnsthecurrentdateasoneofthecolumns.TheviewreturnsthecurrentdatebyusingtheGETDATE()function.Thisviewdoesnotallowyoutocreateanindex.Youneedtocreateanindexontheview.
Whichtwoactionsshouldyouperform?()