mysql

Google Apps Script, JDBC and MySQL does not work with Date 0000-00-00

由 别等时光非礼了梦想. 提交于 2021-02-18 19:09:50
问题 I am trying to read a MySQL db record using this simple code in Google Apps Script: function testConn(){ // make the connection var connection = Jdbc.getConnection("jdbc:mysql://" + DB.URL + ":" + DB.PORT + "/" + DB.DATABASE, DB.USERNAME, DB.PASSWORD); // perform the query var SQLstatement = connection.createStatement(); var result = SQLstatement.executeQuery("SELECT date_available FROM oc_product where model = 'B23-U57-U57'"); var colNum = result.getMetaData().getColumnCount(); while(result

Google Apps Script, JDBC and MySQL does not work with Date 0000-00-00

由 心已入冬 提交于 2021-02-18 19:03:08
问题 I am trying to read a MySQL db record using this simple code in Google Apps Script: function testConn(){ // make the connection var connection = Jdbc.getConnection("jdbc:mysql://" + DB.URL + ":" + DB.PORT + "/" + DB.DATABASE, DB.USERNAME, DB.PASSWORD); // perform the query var SQLstatement = connection.createStatement(); var result = SQLstatement.executeQuery("SELECT date_available FROM oc_product where model = 'B23-U57-U57'"); var colNum = result.getMetaData().getColumnCount(); while(result

Activiti7整合SpringBoot(十二)

由 巧了我就是萌 提交于 2021-02-18 18:30:04
1 SpringBoot 整合 Activiti7 的配置 为了能够实现 SpringBoot 与 Activiti7 整合开发，首先我们要引入相关的依赖支持。 所以，我们在工程的 pom.xml 文件中引入相关的依赖，具体依赖如下所示： < properties > < project.build.sourceEncoding > UTF-8 </ project.build.sourceEncoding > < project.reporting.outputEncoding > UTF-8 </ project.reporting.outputEncoding > < java.version > 1.8 </ java.version > </ properties > < dependencies > < dependency > < groupId > org.springframework.boot </ groupId > < artifactId > spring-boot-starter-jdbc </ artifactId > </ dependency > < dependency > < groupId > mysql </ groupId > < artifactId > mysql-connector-java </ artifactId > </

mysql distinct values without empty string and NULL

由 别来无恙 提交于 2021-02-18 18:15:11
问题 How to retrieve mysql distinct values without empty string value and NULL value SELECT DISTINCT CON.EMAILADDRESS AS 'E-MAIL' FROM STUDENT INNER JOIN CONTACT CON ON STUDENT.CONTACT_ID = CON.ID WHERE (CON.EMAILADDRESS IS NOT NULL OR CON.EMAILADDRESS !=' '); But in output still getting empty e-mails too. Can't figure out what wrong I am doing. 回答1: Try this: SELECT DISTINCT CON.EMAILADDRESS AS 'E-MAIL' FROM STUDENT AST INNER JOIN CONTACT CON ON AST.CONTACT_ID = CON.ID WHERE length(trim(CON

Docker : Drupal container linked to mysql container can't connect to mysql during Drupal installation

由 妖精的绣舞 提交于 2021-02-18 18:14:15
问题 I'm fairly new to docker, and I've just been going through the CMS's to see how easy they are to configure. So far, Wordpress and Joomla check out. When I run the drupal container linked to mysql, I get to the drupal installation screen and where it says to connect the DB, and I use my root credentials and db host being 'localhost', and receive errors trying to connect. I've attached an image to show you the output.drupal-config-db-output-error The error I get : Failed to connect to your

.Net Core EF 使用整理合集

由 こ雲淡風輕ζ 提交于 2021-02-18 17:53:48
1. .NetCore中EFCore的使用整理 2. .NetCore中EFCore的使用整理（二）-关联表查询 3. EF Core 1.0 和 SQLServer 2008 分页的问题 4. EF Core中执行Sql语句查询操作之FromSql，ExecuteSqlCommand，SqlQuery .NetCore中EFCore for MySql整理 .NetCore中EFCore for MySql整理(二) .NetCore中EFCore for MySql整理(三)之Pomelo.EntityFrameworkCore.MySql 来源： oschina 链接： https://my.oschina.net/u/4276314/blog/3533039

分库分表的方案

由 戏子无情 提交于 2021-02-18 17:49:56
大数据量系统开发中，由于数据量很大，经常遇到数据存储在集群上的需求，这时候就需要在不同的方案中进行权衡选择了。 一种选择是利用现成的中间件，比如ES，HBASE，mongdb等，这些中间件自带集群扩展功能，业务代码无需关注水平扩展。 还有一种是关系数据库+分库分表路由的方式，典型的是shardingJDBC+多台mysql，通过shardingJDBC来进行路由到哪台mysql的方式完成。 第二种方式用起来比较费事，需要手工配置路由规则，因此最好的方式还是核心交易数据用这种方式，非核心数据还是用ES这种集群中间件来做，简化代码开发。 来源： oschina 链接： https://my.oschina.net/u/778683/blog/4955261

MongoDB增删改查

由 前提是你 提交于 2021-02-18 17:40:28
一：启动mongodb 1、linux系统（Ubuntu）：sudo server mongodb start 2、window系统：mongod，启动之后不能关闭cmd窗口，必须挂起 二：运行mongodb 命令：mongo 三、创建数据库 使用use 命令创建数据库----有就切换，没有就创建数据库 命令：use 数据库名 切换数据库 命令：use 数据库名 eg： 查看当前数据库： 查看所有数据库 销毁数据库 四：创建集合 在 MongoDB 中，一个数据库包含多个集合，类似于 MySQL 中一个数据库包含多个表；一个集合包含多个文档，类似于 MySQL 中一个表包含多条数据。 可以把集合记为表，文档记为一条记录。 命令：db.createcolleciton("school") 查看所有集合： 命令：show collections 五：插入数据 插入数据有两个命令 命令：db.school.insert() 命令：db.school.save() insert 和 save 的区别：为了方便记忆，可以先从字面上进行理解，insert 是插入，侧重于新增一个记录的含义；save 是保存，可以保存一个新的记录，也可以保存对一个记录的修改。因此，insert 不能插入一条已经存在的记录，如果已经有了一条记录(以主键为准)，insert 操作会报错，而使用 save

storing code snippets in a database

由 ￣綄美尐妖づ 提交于 2021-02-18 17:16:08
问题 I want to make a code snippet database web application. Would the best way to store it in the database be to html encode everything to prevent XSS when displaying the snippets on the web page? Thanks for the help! 回答1: The database has nothing to do with this; you simply need to escape the snippets when they are rendered as HTML. At minimum, you need to encode all & as & and all < characters as < . However, your server-side language already has a built-in HTML encoding function; you should

How to use date_format when using JPQL/JPA

由 孤街醉人 提交于 2021-02-18 17:11:05
问题 I am doing Java EE with MySQL as database and implementing JPA on my codes. I have no problem retrieving the data from MySQL Workbench but when I change my syntax to JPQL's it does not work. For e.g. in MySQL - it works SELECT date_format(s.date,'%Y, %m, %d') from Transactions s; in JPQL - it does not SELECT date_format(s.date,'%Y, %m, %d') from TransactionEntity s; How do i modify to suit the JPA query? Note: in JPQL the following works SELECT s.date from TransactionEntity s; 回答1: SQL
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