数据库编程 流程控制语句REPEAT循环语句 课程目标 1)理解 —— REPEAT语句的语法规则; 2)掌握 —— REPEAT语句的使用方法; REPEAT语句 REPEAT语句格式如下: [begin_label:] REPEAT statement_list UNTIL search_condition END REPEAT [end_label] 说明:REPEAT语句首先执行statement_list中的语句,然后判断search_condition是否为真,为真则停止循环,不为真则继续循环。REPEAT也可以被标注。 REPEAT语句和WHILE语句的区别在于:REPEAT语句先执行语句,后进行判断;而WHILE语句是先判断,条件为真时才执行语句。 WHILE循环语句举例 【例】 用REPEAT语句创建一个存储过程。程序如下: DELIMITER $$ CREATE PROCEDURE dowhile1() BEGIN DECLARE v1 INT DEFAULT 5; REPEAT set v1=v1-1; UNTIL v1<1; END REPEAT; END$$
2022-05-29 13:02:45 1.28MB mysql 数据库 综合资源 database
[Objective] This paper compares the prediction accuracy and efficiency of different machine learning algorithms, aiming to identify new consumers with repeat purchase intentions. It also provides a theoretical framework for customer classification. [Methods] First, we collected the server logs of a dealer on Taobao.com from 2015 to 2018,as well as its orders and consumers’ personal information. And then, we used different algorithms to train theproposedmodels. [Results] The SMOTE algorithm combined with the random forest algorithm obtained the highest prediction accuracy of 96%. [Limitations] The sample data size needs to be expanded. [Conclusions] The fusion algorithm basedon SMOTE and random forest has better performance in predicting repurchase intentions of new consumers.
2022-04-06 20:44:11 467KB Repeat Purchase
1
2020年第十一届蓝桥杯省赛第一场C/C++B组试题 D: REPEAT程序 附件prog.txt
2022-04-06 01:50:28 19KB 附件
1
今天小编就为大家分享一篇TensorFlow dataset.shuffle、batch、repeat的使用详解,具有很好的参考价值,希望对大家有所帮助。一起跟随小编过来看看吧
2022-02-24 14:20:38 42KB TensorFlow dataset.shuffle batch repeat
1
官方离线安装包,测试可用。使用rpm -ivh [rpm完整包名] 进行安装
2022-01-03 21:01:54 6KB rpm
官方离线安装包,测试可用。使用rpm -ivh [rpm完整包名] 进行安装
2022-01-03 21:01:52 7KB rpm
扩充PL/0语言为PL/1语言,其中增加if S then S1 else S2语句.改造PL/1为PL/2,使其支持repeat S until E语句、for循环
2021-12-14 14:05:47 240KB 编译原理 PL0 if_else
1
RepBaseRepeatMaskerEdition-20170127.tar.gz
2021-11-08 22:43:45 48.84MB genome repeat repeatmask software
1
崇高的重复命令插件 重复上一个或下一个命令指定的计数次数。 演示 安装 这个插件是插件集的一部分。 你可以安装 sublime-enhanced,这个插件会自动安装。 如果你想单独安装这个包,请检查包的“单独安装包”部分。 特征 重复上一个命令 删除下一个命令指定的次数 用法 点击快捷键重复上一个或下一个命令。 例子: # before call1() # <- cursors at this line call2() call3() call4() # after "repeat next command 3 times, delete line" call4() 命令 描述 键盘快捷键 接下来重复, alt+1 重复下一步, alt+2 重复下一步, alt+3 接下来重复, Alt+4 重复下一步, A
2021-07-15 14:03:40 5KB Python
1
Universal_Repeater_Mode_Guide.pdf
2021-06-23 22:01:14 305KB Universal_Repeat
1