| 1. | The union operation is different from using joins that combine columns from two tables
Union运算不同于使用联接合并两个表中的列的运算。 |
| 2. | Specifies that all union operations are performed by merging , hashing , or concatenating union sets
指定所有union运算由合并、哈希或串联union集执行。 |
| 3. | If union is involved in the main query , only the last query involving a union operation can have the option clause
如果主查询中涉及union ，则只有涉及union运算符的最后一个查询才能有option子句。 |
| 4. | Then , the data types of the final result of the union operation are cast to the corresponding columns of the table targeted by the insert operation
这样， union运算的最终结果的数据类型将转换为与insert操作的目标表中的列相应。 |
| 5. | The experiments also show that our union operation algorithm is superior to the algorithm that extracts the rules from context directly in time - consuming
实验结果同样表明我们的并运算算法在时间性能上要优于直接从原形式背景中提取规则的算法。 |
| 6. | The definitions of the columns that are part of a union operation do not have to be the same , but they must be compatible through implicit conversion
作为union运算一部分的列定义可以不相同，但它们必须通过隐式转换实现兼容。如果数据类型不同，则根据 |
| 7. | A technique to simulate and evaluate the command and control system in union operation with the system scenarios is presented to reduce the time and expense of system development
摘要为适应一体化联合作战指挥控制系统快速决策与实时性能评价的要求，提出一种基于场景的系统快速模拟与评价模型。 |
| 8. | 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语句中的union当union运算符用在insert语句中时， sql server 2005根据数据类型转换规则独立地转换每个union运算的数据类型。 |
| 9. | Based on the investigation of the average heat load during heating period and non - heating period , the paper conducts the distribution of heat load , thermodynamical calculation and economic index calculation for the union operation of various heating units
根据调查采暖期和非采暖期的平均热负荷，对不同类型的供热机组联合运行进行了热负荷的分配、热力计算及经济指标的计算。 |
| 10. | Some net operations , such as addition , cartesian addition , cartesian production and general cartesian production of weighted net systems , were presented in some papers , and union operation , decomposition operations were given in others
已有文献提出了petri网的加法、笛加、笛积、广义笛加等运算并研究了一系列重要性质。另有文献定义了petri网的并运算、分解运算，讨论了这些运算保持网的结构性质和公平性的条件。 |
