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R语言连接MySQL报错:could not run statement: The used command is not allowed with this MySQL version
版本说明 R版本:3.5 MySQL版本:8.0 RMySQL版本:0.10.19 情景说明: 使用RMySQL成功连接到MySQL数据库,可以进行查询操作,但在插入时报错,提示信息如下: con <- dbConnect(MySQL(), host="127.0.0.1", dbname="epi ...
分类:数据库   时间:2020-02-16 13:20:06    阅读次数:127
寒假14天
package com.hjf.dao; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util. ...
分类:其他好文   时间:2020-02-14 20:58:12    阅读次数:51
Personal experience on source code management(Git)
1.Understand Distributed SCM; 2.Check in your source code correctly and elegantly ...
分类:其他好文   时间:2020-02-14 00:46:28    阅读次数:58
假期学习13
今天又弄Java Web, DBUtil: import java.beans.Statement; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.s ...
分类:其他好文   时间:2020-02-13 22:45:12    阅读次数:81
3.2 循环结构
一、while循环语句 while循环语句的格式如下: [init_statement] while (test_expression) { statement; [iteration_statement] } View Code 例子: 1 class WhileTest 2 { 3 public ...
分类:其他好文   时间:2020-02-13 13:05:51    阅读次数:54
182. Duplicate Emails
Write a SQL query to find all duplicate emails in a table named Person. + + + | Id | Email | + + + | 1 | a@b.com | | 2 | c@d.com | | 3 | a@b.com | + + ...
分类:其他好文   时间:2020-02-12 16:35:55    阅读次数:61
A1077 Kuchiguse Suffix-后缀
The Japanese language is notorious for its sentence ending particles. Personal preference of such particles can be considered as a reflection of the s ...
分类:其他好文   时间:2020-02-11 18:59:29    阅读次数:115
177. Nth Highest Salary
Write a SQL query to get the nth highest salary from the Employee table. + + + | Id | Salary | + + + | 1 | 100 | | 2 | 200 | | 3 | 300 | + + + For exa ...
分类:其他好文   时间:2020-02-11 18:53:28    阅读次数:53
175. Combine Two Tables
Table: Person + + + | Column Name | Type | + + + | PersonId | int | | FirstName | varchar | | LastName | varchar | + + + PersonId is the primary key c ...
分类:其他好文   时间:2020-02-11 17:41:53    阅读次数:68
python编程基础
if判断语句if expression : #没有括号 statement;elif expression : statement;else: statement;for循环语句for i in range(1,10,2): statementwhile循环while expression: sta... ...
分类:编程语言   时间:2020-02-11 00:42:25    阅读次数:75
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