条件子句
- 与 条件子句 相关的网络例句 [注:此内容来源于网络,仅供参考]
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For or when the condition becomes false, but not when the loop is terminated by a break statement.
循环可以有一个else 子句;它在循环迭代完整个列表或执行条件为false时执
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This query retrieves the sum total of all marks for a particular student and it uses a condition in the where clause.
此查询检索某个学生的所有商标的总和,它使用在WHERE子句中的条件。
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But with each update, in the where clause an extra condition is added that specifies the version of the object that was originally loaded.
但是对每次更新,一个额外的用来指定初始装载的对象的版本的条件会增加在 where 子句中。
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Introduce Explaining Variable is particularly valuable with conditional logic in which it is useful to take each clause of a condition and explain what the condition means with a well-named temp.
Introduce Explaining Variable用来处理那种带有分支条件的逻辑特别有效,用一个取了个好名字的临时变量来代替每一个分支条件子句,变量的名字解释分支条件。
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The optimization methods of database SQL query were studied and some available query optimization Methods were given out as follows: The incompatible data type should avoid to be used; More redundancy search parameters should be given as join condition in join query; In some condition, the number of note hitted to target was estimated by optimizing implement using the average density; Some other maths operating symbol should avoid to be used as condition parameters in WHERE clause; Some operating symbol and its sentence should avoid to be used also; When the cluster function was used,the WHERE clause should be paied attention to more,and so on.
作者单位:(重庆工学院商贸信息学院,重庆 400050)摘要:数据库SQL查询语句的优化,须注意:避免使用不兼容数据类型;连接查询中应多给连接条件提供一些冗余的搜索参数;某种条件下优化器只能使用其平均密度以估计命中的记录数;避免对WHERE子句中条件参数使用其它数学操作符;避免使用某些操作符及相应语句;聚簇函数的使用应注意WHERE子句。
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The satisfiability of conjunction normal form is a typical NP-complete problem. To study the complexity of SAT problem, a new concept of saturated clause muster has been introduced with using the characteristic of saturated clause muster. The sufficient condition of SAT problem was approved to be a polynomial and has opened out essential distinction of 2SAT and 3SAT problems.
合取范式可满足性问题是典型的NP完全问题,本文引入了一个饱和子句集的新概念,利用饱和子句集的特性,研究了SAT问题的复杂性,证明了SAT问题复杂性为多项式的一个充分条件,并揭示了二元可满足性问题与三元可满足性问题的本质差别。
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SELECT ProductID, Name FROM AdventureWorks2008R2.Production.Product WHERE Class ='H' ORDER BY ProductID
在 WHERE 和 HAVING 子句中的搜寻条件,也就是识别资格,可包含下列各项
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When queried, table name corresponded to current data window was extracted, and sent it to GQM, query if-clause was extracted to reconstruct SQL script.
查询时,先提取当前数据窗口对应的表名,将其传给GQM,再提取GQM查询条件子句重构SQL脚本。
- 推荐网络例句
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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.
Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。
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I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.
我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。
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The shamrock is the symbol of Ireland and of St.
三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。