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开源海哥 2023-05-26 13:11:25 +08:00
parent b9d3a6e16c
commit 5168dbd786
1 changed files with 17 additions and 11 deletions
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docs/zh/base/querywrapper.md
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@ -125,11 +125,14 @@ FROM tb_account
```java ```java
QueryWrapper wrapper = QueryWrapper.create() QueryWrapper wrapper = QueryWrapper.create()
.select(ACCOUNT.ID .select(
,case_().when(ACCOUNT.ID.ge(2)).then("x2") ACCOUNT.ID
,case_()
.when(ACCOUNT.ID.ge(2)).then("x2")
.when(ACCOUNT.ID.ge(1)).then("x1") .when(ACCOUNT.ID.ge(1)).then("x1")
.else_("x100") .else_("x100")
.end().as("xName") .end().as("xName")
)
``` ```
其查询生成的 Sql 如下： 其查询生成的 Sql 如下：
@ -156,11 +159,13 @@ SQL 执行的结果如下：
```java ```java
QueryWrapper queryWrapper = QueryWrapper.create() QueryWrapper queryWrapper = QueryWrapper.create()
.select(ACCOUNT.ALL_COLUMNS, .select(
ACCOUNT.ALL_COLUMNS,
case_(ACCOUNT.ID) case_(ACCOUNT.ID)
.when(100).then(100) .when(100).then(100)
.when(200).then(200) .when(200).then(200)
.else_(300).end().as("result")) .else_(300).end().as("result")
)
.from(ACCOUNT) .from(ACCOUNT)
.where(ACCOUNT.USER_NAME.like("michael")); .where(ACCOUNT.USER_NAME.like("michael"));
``` ```
@ -173,7 +178,8 @@ SELECT *,
WHEN 100 THEN 100 WHEN 100 THEN 100
WHEN 200 THEN 200 WHEN 200 THEN 200
ELSE 300 END) AS `result` ELSE 300 END) AS `result`
FROM `tb_account` WHERE `user_name` LIKE ? FROM `tb_account`
WHERE `user_name` LIKE ?
``` ```
::: tip 提示 ::: tip 提示