mirror of
https://gitee.com/mybatis-flex/mybatis-flex.git
synced 2025-12-06 16:48:24 +08:00
update docs
This commit is contained in:
开源海哥
parent
e86db3f92f
commit
0ca7c40326
@ -122,6 +122,20 @@ public class AccountSqlTester {
|
||||
System.out.println(sql);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testWhereSelectSql() {
|
||||
QueryWrapper queryWrapper = QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(
|
||||
select(ARTICLE.ACCOUNT_ID).from(ARTICLE).where(ARTICLE.ID.ge(100))
|
||||
));
|
||||
|
||||
IDialect dialect = new CommonsDialectImpl();
|
||||
String sql = dialect.forSelectListByQuery(queryWrapper);
|
||||
System.out.println(sql);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testGroupSql() {
|
||||
QueryWrapper queryWrapper = QueryWrapper.create()
|
||||
@ -140,7 +154,7 @@ public class AccountSqlTester {
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.groupBy(ACCOUNT.USER_NAME)
|
||||
.having(ACCOUNT.AGE.between(18,25));
|
||||
.having(ACCOUNT.AGE.between(18, 25));
|
||||
|
||||
IDialect dialect = new CommonsDialectImpl();
|
||||
String sql = dialect.forSelectListByQuery(queryWrapper);
|
||||
@ -165,7 +179,7 @@ public class AccountSqlTester {
|
||||
QueryWrapper queryWrapper = QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.orderBy(ACCOUNT.AGE.asc(),ACCOUNT.USER_NAME.desc().nullsLast());
|
||||
.orderBy(ACCOUNT.AGE.asc(), ACCOUNT.USER_NAME.desc().nullsLast());
|
||||
|
||||
IDialect dialect = new CommonsDialectImpl();
|
||||
String sql = dialect.forSelectListByQuery(queryWrapper);
|
||||
|
||||
129
readme_zh.md
129
readme_zh.md
@ -83,19 +83,19 @@ class HelloWorld {
|
||||
```java
|
||||
//示例2：通过 QueryWrapper 构建条件查询数据列表
|
||||
QueryWrapper query=QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(100))
|
||||
.and(ACCOUNT.USER_NAME.like("张").or(ACCOUNT.USER_NAME.like("李")));
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(100))
|
||||
.and(ACCOUNT.USER_NAME.like("张").or(ACCOUNT.USER_NAME.like("李")));
|
||||
|
||||
// 执行 SQL：
|
||||
// ELECT * FROM `tb_account`
|
||||
// WHERE `tb_account`.`id` >= 100
|
||||
// AND (`tb_account`.`user_name` LIKE '%张%' OR `tb_account`.`user_name` LIKE '%李%' )
|
||||
List<Account> accounts=MybatisFlexBootstrap.getInstance()
|
||||
.execute(AccountMapper.class,mapper->
|
||||
List<Account> accounts=MybatisFlexBootstrap.getInstance()
|
||||
.execute(AccountMapper.class,mapper->
|
||||
mapper.selectListByQuery(query)
|
||||
);
|
||||
);
|
||||
```
|
||||
|
||||
示例3：分页查询
|
||||
@ -104,11 +104,11 @@ QueryWrapper query=QueryWrapper.create()
|
||||
// 示例3：分页查询
|
||||
// 查询第 5 页，每页 10 条数据，通过 QueryWrapper 构建条件查询
|
||||
QueryWrapper query=QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(100))
|
||||
.and(ACCOUNT.USER_NAME.like("张").or(ACCOUNT.USER_NAME.like("李")))
|
||||
.orderBy(ACCOUNT.ID.desc());
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(100))
|
||||
.and(ACCOUNT.USER_NAME.like("张").or(ACCOUNT.USER_NAME.like("李")))
|
||||
.orderBy(ACCOUNT.ID.desc());
|
||||
|
||||
// 执行 SQL：
|
||||
// ELECT * FROM `tb_account`
|
||||
@ -116,10 +116,10 @@ QueryWrapper query=QueryWrapper.create()
|
||||
// AND (`user_name` LIKE '%张%' OR `user_name` LIKE '%李%' )
|
||||
// ORDER BY `id` DESC
|
||||
// LIMIT 40,10
|
||||
Page<Account> accounts=MybatisFlexBootstrap.getInstance()
|
||||
.execute(AccountMapper.class,mapper->
|
||||
mapper.paginate(5,10,query)
|
||||
);
|
||||
Page<Account> accounts=MybatisFlexBootstrap.getInstance()
|
||||
.execute(AccountMapper.class,mapper->
|
||||
mapper.paginate(5,10,query)
|
||||
);
|
||||
```
|
||||
|
||||
## QueryWrapper 示例
|
||||
@ -128,7 +128,7 @@ QueryWrapper query=QueryWrapper.create()
|
||||
|
||||
```java
|
||||
QueryWrapper query=new QueryWrapper();
|
||||
query.select().from(ACCOUNT)
|
||||
query.select().from(ACCOUNT)
|
||||
|
||||
// SQL:
|
||||
// SELECT * FROM tb_account
|
||||
@ -138,7 +138,8 @@ QueryWrapper query=new QueryWrapper();
|
||||
|
||||
```java
|
||||
QueryWrapper query=new QueryWrapper();
|
||||
query.select(ACCOUNT.ID,ACCOUNT.USER_NAME).from(ACCOUNT)
|
||||
query.select(ACCOUNT.ID,ACCOUNT.USER_NAME)
|
||||
.from(ACCOUNT)
|
||||
|
||||
// SQL:
|
||||
// SELECT id, user_name
|
||||
@ -147,7 +148,7 @@ QueryWrapper query=new QueryWrapper();
|
||||
|
||||
```java
|
||||
QueryWrapper query=new QueryWrapper();
|
||||
query.select(ACCOUNT.ALL_COLUMNS).from(ACCOUNT)
|
||||
query.select(ACCOUNT.ALL_COLUMNS).from(ACCOUNT)
|
||||
|
||||
// SQL:
|
||||
// SELECT id, user_name, birthday, sex, is_normal
|
||||
@ -157,13 +158,13 @@ QueryWrapper query=new QueryWrapper();
|
||||
### select functions
|
||||
|
||||
```java
|
||||
QueryWrapper query=new QueryWrapper()
|
||||
.select(
|
||||
QueryWrapper query=new QueryWrapper()
|
||||
.select(
|
||||
ACCOUNT.ID,
|
||||
ACCOUNT.USER_NAME,
|
||||
max(ACCOUNT.BIRTHDAY),
|
||||
avg(ACCOUNT.SEX).as("sex_avg")
|
||||
).from(ACCOUNT);
|
||||
).from(ACCOUNT);
|
||||
|
||||
// SQL:
|
||||
// SELECT id, user_name,
|
||||
@ -176,10 +177,10 @@ QueryWrapper query=new QueryWrapper();
|
||||
|
||||
```java
|
||||
QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(100))
|
||||
.and(ACCOUNT.USER_NAME.like("michael"));
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(100))
|
||||
.and(ACCOUNT.USER_NAME.like("michael"));
|
||||
|
||||
// SQL:
|
||||
// SELECT * FROM tb_account
|
||||
@ -187,18 +188,33 @@ QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
// AND user_name LIKE ?
|
||||
```
|
||||
|
||||
### where select
|
||||
```java
|
||||
QueryWrapper queryWrapper = QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(
|
||||
select(ARTICLE.ACCOUNT_ID).from(ARTICLE).where(ARTICLE.ID.ge(100))
|
||||
));
|
||||
|
||||
// SQL:
|
||||
// SELECT * FROM `tb_account`
|
||||
// WHERE `id` >=
|
||||
// (SELECT `account_id` FROM `tb_article` WHERE `id` >= ? )
|
||||
```
|
||||
|
||||
### exists, not exists
|
||||
|
||||
```java
|
||||
QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(100))
|
||||
.and(
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(100))
|
||||
.and(
|
||||
exist(
|
||||
selectOne().from(ARTICLE).where(ARTICLE.ID.ge(100))
|
||||
selectOne().from(ARTICLE).where(ARTICLE.ID.ge(100))
|
||||
)
|
||||
);
|
||||
);
|
||||
|
||||
// SQL:
|
||||
// SELECT * FROM tb_account
|
||||
@ -212,11 +228,11 @@ QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
|
||||
```java
|
||||
QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(100))
|
||||
.and(ACCOUNT.SEX.eq(1).or(ACCOUNT.SEX.eq(2)))
|
||||
.or(ACCOUNT.AGE.in(18,19,20).and(ACCOUNT.USER_NAME.like("michael")));
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.where(ACCOUNT.ID.ge(100))
|
||||
.and(ACCOUNT.SEX.eq(1).or(ACCOUNT.SEX.eq(2)))
|
||||
.or(ACCOUNT.AGE.in(18,19,20).and(ACCOUNT.USER_NAME.like("michael")));
|
||||
|
||||
// SQL:
|
||||
// SELECT * FROM tb_account
|
||||
@ -229,9 +245,9 @@ QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
|
||||
```java
|
||||
QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.groupBy(ACCOUNT.USER_NAME);
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.groupBy(ACCOUNT.USER_NAME);
|
||||
|
||||
// SQL:
|
||||
// SELECT * FROM tb_account
|
||||
@ -242,10 +258,10 @@ QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
|
||||
```java
|
||||
QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.groupBy(ACCOUNT.USER_NAME)
|
||||
.having(ACCOUNT.AGE.between(18,25));
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.groupBy(ACCOUNT.USER_NAME)
|
||||
.having(ACCOUNT.AGE.between(18,25));
|
||||
|
||||
// SQL:
|
||||
// SELECT * FROM tb_account
|
||||
@ -257,9 +273,10 @@ QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
|
||||
```java
|
||||
QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.orderBy(ACCOUNT.AGE.asc(), ACCOUNT.USER_NAME.desc().nullsLast());
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.orderBy(ACCOUNT.AGE.asc()
|
||||
, ACCOUNT.USER_NAME.desc().nullsLast());
|
||||
|
||||
// SQL:
|
||||
// SELECT * FROM `tb_account`
|
||||
@ -270,11 +287,11 @@ QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
|
||||
```java
|
||||
QueryWrapper queryWrapper=QueryWrapper.create()
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.leftJoin(ARTICLE).on(ACCOUNT.ID.eq(ARTICLE.ACCOUNT_ID))
|
||||
.innerJoin(ARTICLE).on(ACCOUNT.ID.eq(ARTICLE.ACCOUNT_ID))
|
||||
.where(ACCOUNT.AGE.ge(10));
|
||||
.select()
|
||||
.from(ACCOUNT)
|
||||
.leftJoin(ARTICLE).on(ACCOUNT.ID.eq(ARTICLE.ACCOUNT_ID))
|
||||
.innerJoin(ARTICLE).on(ACCOUNT.ID.eq(ARTICLE.ACCOUNT_ID))
|
||||
.where(ACCOUNT.AGE.ge(10));
|
||||
|
||||
// SQL:
|
||||
// SELECT * FROM tb_account
|
||||
@ -354,11 +371,11 @@ update(T entity,boolean ignoreNulls)
|
||||
|
||||
```java
|
||||
Account account=UpdateEntity.of(Account.class);
|
||||
account.setId(100);
|
||||
account.setUserName(null);
|
||||
account.setSex(1);
|
||||
account.setId(100);
|
||||
account.setUserName(null);
|
||||
account.setSex(1);
|
||||
|
||||
accountMapper.update(account,false);
|
||||
accountMapper.update(account,false);
|
||||
```
|
||||
|
||||
以上的示例中，会把 id 为 100 这条数据中的 user_name 字段更新为 null，sex 字段更新为 1，其他字段不会被更新。也就是说，通过 `UpdateEntity`
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user