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errorlove:
哥哥,你确定这方法有效吗,我遇到了,不行啊,求解答,谢谢了,如 ...
mysql 表名字段与关键字重名解决方法
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Quick setup — if you've done this kind of thing before
via HTTP
Create a new repository from the command line
touch README.md
git init
git add README.md
git commit -m "first commit"
git remote add origin http://localhost:8080/git/root/aaa.git
git push -u origin master
Push an existing ...
drop table act_evt_log;
drop table act_hi_actinst;
drop table act_hi_attachment;
drop table act_hi_comment;
drop table act_hi_detail;
drop table act_hi_identitylink;
drop table act_hi_procinst;
drop table act_hi_taskinst;
drop table act_hi_varinst;
drop table act_id_info;
drop table act_id_membership ...
intellij idea 省电模式
会造成关键字不高亮,错误代码不提示等等。
解决:
点击idea 的file 再次点击power save mode 禁用
1、关键字:
whereis
例如:whereis hive 则是找出hive 环境变量配置在哪。
2、$PATH 在shell 变量中,不能出现$PATH 定义,不然会将系统环境变量PATH 覆盖,导致其他命令找不到。
3、赋权 chmod +x xx.sh
4、shell 读取文件行数
$file_path =text.txt
function read(){
while read LINE
do
echo $LINE
done <$file_path
}
mysql之group_concat函数详解
group_concat( [DISTINCT] 要连接的字段 [Order BY 排序字段 ASC/DESC] [Separator '分隔符'] )
下面举例说明:
select * from goods;
+------+------+
| id| price|
+------+------+
|1 | 10|
|1 | 20|
|1 | 20|
|2 | 20|
|3 | 200 |
|3 | 500 |
+------+------+
6 rows in set (0.00 sec)
以id分组,把price字段的值 ...
[ https://issues.apache.org/jira/browse/HIVE-2935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13545973#comment-13545973 ]
Nicolas Fouché commented on HIVE-2935:
--------------------------------------
Using CDH 4.1.2, which includes this patch. I thi ...
命令
导出:
sqoop export --connect jdbc:mysql://localhost:3306/test --username root --password root --table test --export-dir '/user/hive/warehouse/test' --fields-terminated-by '\001' --input-null-string '\\N' --input-null-non-string '\\N' --input-lines-terminated-by '\n' -m 1
导入
mysql --》hdfs;
...
@Component
@PropertySource("classpath:hive.properties")//与之前版本差异。
@ConfigurationProperties(prefix = "hive")
public class HiveConfig {
public String host;
public String url;
public String getHost() {
return host;
}
public void setHost(String host) {
...
前端react 发布到nginx
- 博客分类:
- js
1、拷贝前端文件,去除node_modules。并打包root.zip
2、上传liunx 解压,定位到解压文件根目录。如root/
3、安装,cnpm -install .完成。
4、配置nginx.conf .
location / {
root html;//可以是绝对路径
index index.html index.htm;
try_files $uri /index.html;
}
5、启动 nginx -c nginx.conf
1、语法
onClick={this.handleOk} 与onClick={this.handleOk()}
后面加括号表示直接调用。
错误提示:
Cannot update during an existing state transition (such as within `render` or another component's constructor).
Render methods should be a pure function of props and state; constructor side-effects are an anti-pattern
but ca ...
Unable to load configuration. - bean - jar:file:/D:/javaProgramFiles/tomcat-6.0.20/webapps/zoyeo Exception starting filter struts2
Unable to load configuration. - bean - jar:file:/D:/javaProgramFiles/tomcat-6.0.20/webapps/zoyeoa/WEB-INF/lib/struts2-core-2.1.2.jar!/struts-default.xml:46:178
at com.ope ...
org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Bean name 'test' is already used in this file.
----把spring 中的nama 去掉就行了
报错:
Caused by: javax.xml.parsers.ParserConfigurationException: Unable to validate using XSD: Your JAXP provider [org.apache.xerces. ...
function iteratorTable(tablename){
var total=0;
for(var i=1;i<tablename.rows.length;i++)
{
//取出第三列值的和
total+=parseFloat(tablename.rows[i].cells[2].innerText)
}
alert(total);
}
function test(){
iteratorTable(document.getElementById("table ...