union operator 中文意思是什麼

union operator 解釋
合併操作符
  • union : n 1 聯合，結合，合併；團結，融洽，一致。2 同盟，聯盟。3 公會，協會；工會；〈U 〉 大學生俱樂部。4 ...
  • operator : n 1 操作者，機務員；司機，駕駛員；【軍事】電話兵；【電話】接線員，話務員（＝telephone operator）...
  1. In some projects charged by our lab such as national 863 project - " crop planting management components based on weather analyse ", anhui provincial 95 key project - " agricultural meteorology disaster evaluation system base on gis in anhui province " and the project " small coal mine security management and decision system based on gis in anhui province ", this paper combines the theory and arithmetic of rough set with gis and data mining in idss, investiges the application of rough set theory to precision analysis of attribute data and logical operation in gis, analyzes the logical operation based on rough set ( logical union, logical intersection, logical complement, mixed logical operation etc. ), so that it can give a method y to research the gis attribute data and the uncertainty of attribute data after superposition operator, so as to express the roughness and illegibility of attribute data more accurately

    在完成試驗室所承擔的國家863項目「基於氣象分析的農作物種植管理軟構件」 、省95攻關項目「基於gis的安徽省重大農業氣象災害測評系統」和「基於gis的安徽省小煤礦安全管理決策系統」等項目中，將粗糙集理論和演算法與gis 、智能決策系統中的知識發現等相結合，對粗糙集理論在gis屬性數據和邏輯運算精度分析中的應用情況進行了研究，分析了基於粗集的gis邏輯運算（邏輯並、邏輯交、邏輯補、混合邏輯等） ，從而為研究gis屬性數據及其疊加運算后屬性數據的不確定性提供了一種方法，能比較準確地表達屬性數據的模糊性和粗糙性。
  2. Union all is the only set operator allowed between the last anchor member and first recursive member, and when combining multiple recursive members

    在最後一個定位點成員和第一個遞歸成員之間，以及組合多個遞歸成員時，只能使用union all集合運算符。
  3. The transact - sql union set operator can be used within a view to combine the results of two or more queries from separate tables into a single result set

    Transact - sql union集合運算符可在視圖內使用，將單獨表的兩個或多個查詢的結果組合到單一的結果集中。
  4. At first the approximate operators of rough sets are modified, so the new operators of union, intersection and complement and approximate power sets are presented. this has enriched rough sets theory from the operator - oriented and set - oriented views. then by combining topology, rough topology and approximate topologies are defined and researched

    首先修正粗糙集近似運算元，提出近似集的新型並、交、補運算和近似冪集空間，從運算元論和集合論兩者的角度豐富了粗糙集理論；再結合拓撲，定義和研究了粗糙拓撲、近似拓撲。
  5. When a union operator is inside an insert statement, sql server 2005 independently casts the data type of each union operation according to the rules of data type conversion

    Insert into . . . select語句中的union當union運算符用在insert語句中時， sql server 2005根據數據類型轉換規則獨立地轉換每個union運算的數據類型。
  6. For browse cannot appear in select statements that are joined by the union operator

    For browse不能出現在由union運算符所聯接的select語句中。
  7. However, it is not appropriate to use the logical union operator to union two database queries, or to use the shift operator to write to a stream

    但是，使用邏輯union運算符聯合兩個數據庫查詢或使用shift運算符寫入流則不合適。
  8. Additionally, when the select statement includes a union operator, the column names or column aliases must be those specified in the first select list

    此外，當select語句包含union運算符時，列名或列的別名必須是在第一選擇列表內指定的列名或列的別名。
  9. To find out all accounts with privileges, you can query each of the system catalog views and combine the results together using the union operator, as shown in

    要查明具有特權的所有帳號，可以查詢每個系統編目視圖並使用union操作符將結果組合在一起，如
  10. However, if select distinct is specified, or if the statement contains a group by clause, or if the select statement contains a union operator, the sort columns must appear in the select list

    但是，如果未指定select distinct ，或者如果select語句包含union運算符，則排序列必須出現在選擇列表中。
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