contain of和contain的区别
时间: 2023-07-15 17:14:02 浏览: 77
"Contain" 是一个动词,表示包含、含有或包括的意思,例如:
- The box contains some books.(这个盒子里包含一些书。)
- The software contains many useful features.(这个软件包含许多有用的功能。)
而 "contain of" 并不是一个常用的短语,通常应该写成 "consist of",表示由什么组成的意思,例如:
- The team consists of five players.(这个团队由五名球员组成。)
- The cake consists of flour, sugar, eggs, and butter.(这个蛋糕由面粉、糖、鸡蛋和黄油组成。)
相关问题
mybatisplus contain
MyBatis-Plus (also known as MyBatis+) is an enhanced library that works on top of the MyBatis SQL mapper framework. It provides additional features and utilities to simplify database operations and improve productivity when working with MyBatis.
One of the useful features provided by MyBatis-Plus is the "contain" method. This method allows you to perform a query that checks if a specific value exists within a column.
Here is an example of how you can use the "contain" method in MyBatis-Plus:
```java
// Assuming you have a User entity with a 'name' column
// and a UserService interface with a `selectByName` method
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
@Override
public List<User> getUsersByName(String name) {
QueryWrapper<User> queryWrapper = new QueryWrapper<>();
queryWrapper.like("name", name);
return baseMapper.selectList(queryWrapper);
}
}
```
In this example, the `getUsersByName` method uses the `like` method from the `QueryWrapper` class to perform a query that checks if the name column contains the specified value. The `%` character is automatically added before and after the name value to indicate a partial match.
You can customize the behavior of the `contain` method by using different methods provided by the `QueryWrapper` class, such as `eq` (equals), `ne` (not equals), `lt` (less than), `gt` (greater than), and more.
Remember to configure and integrate MyBatis-Plus properly in your project to use its features effectively.
hive contain
Hive contains a query language called HiveQL (HQL) which is similar to SQL and allows users to write SQL-like queries that are translated into MapReduce jobs for execution on a Hadoop cluster. Hive also provides a metadata management system that allows users to define and manage schema for their data, as well as configure various aspects of query execution. Additionally, Hive includes built-in support for several file formats, including CSV, JSON, and Parquet, and can integrate with other Hadoop ecosystem tools such as Apache Spark and Apache HBase.