Rent - seeking behaviors are directly unproductive profit - seeking activities resulting in the loss of social welfare 尋租是指導致社會福利損失的dup活動。由戈登
Drop the clustered index on the view and re - create it without specifying the ignore dup key option 刪除視圖的聚集索引,然后重新創(chuàng)建它,而不指定ignore _ dup _ key選項。
The ignore dup key setting applies only to insert operations that occur after the index is created or rebuilt Ignore _ dup _ key設(shè)置僅適用于創(chuàng)建或重新生成索引后發(fā)生的插入操作。
All indexing options that apply to a nonclustered index , except ignore dup key and online , are permitted on secondary xml indexes 除了ignore _ dup _ key和online之外,允許對輔助xml索引使用所有適用于非聚集索引的索引選項。
If an attempt is made to enter data for which there is a unique index and the ignore dup key clause is set to on , only the rows violating the unique index fail 如果在存在唯一索引并且ignore _ dup _ key子句設(shè)置為on的情況下輸入數(shù)據(jù),則只有違反unique索引的行才會失敗。
The sql server 2005 database engine does not allow creating a unique index on columns that already include duplicate values , whether or not ignore dup key is set to on 無論ignore _ dup _ key是否設(shè)置為on , sql server 2005數(shù)據(jù)庫引擎都不允許為已包含重復值的列創(chuàng)建唯一索引。
On linux , if a new handle is to be allocated , the system call dup is used , while in cases where a known handle is used as a new handle , the system call 在linux中,如果要分配一個新句柄,可以使用系統(tǒng)調(diào)用dup ( ) ;如果要將一個已知句柄當作一個新句柄使用,可以使用系統(tǒng)調(diào)用dup2 ( ) 。
However , dup to the negative effects brought about by the practice of planned economy , the urbaniztion and industrialization of chengdu deviate from each other seriously from 1960s to 1970s 但是,由于推行計劃經(jīng)濟體制帶來的負面影響,成都城市化與工業(yè)化在20世紀60 - 70年代里出現(xiàn)了嚴重背離。
From the perspective of economics , collaboration with bidding is a dup ( directly unproductive profit ) . it is a rent - seeking behavior in general . therefore , the conduct against the collaboration with bidding should begin from raising the collaboration cost 從經(jīng)濟學角度,串通招標投標是一種非生產(chǎn)性尋求利益活動,是廣義上的尋租行為,反串通招標投標行為應(yīng)從提高串通成本入手。