third_codes/mybatis-plus-join
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yulichang 2021-01-31 18:49:11 +08:00
parent b53e545425
commit fb89f5d84c
1 changed files with 8 additions and 6 deletions
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README.md
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@ -60,7 +60,8 @@ class test {
.select("a.province") .select("a.province")
.leftJoin("user_address addr on t.id = addr.user_id") .leftJoin("user_address addr on t.id = addr.user_id")
.rightJoin("area a on addr.area_id = a.id") .rightJoin("area a on addr.area_id = a.id")
.eq(true, UserDO::getId, 1) .gt(true, UserDO::getId, 1)
.eq(true, UserDO::getSex, "男")
.stringQuery() .stringQuery()
.like(true, "addr.tel", "1") .like(true, "addr.tel", "1")
.le(true, "a.province", "1")); .le(true, "a.province", "1"));
@ -80,11 +81,12 @@ SELECT
addr.address, addr.address,
a.province a.province
FROM FROM
user t user t
LEFT JOIN user_address addr on t.id = addr.user_id LEFT JOIN user_address addr on t.id = addr.user_id
RIGHT JOIN area a on addr.area_id = a.id RIGHT JOIN area a on addr.area_id = a.id
WHERE ( WHERE (
t.id = ? t.id > ?
AND t.sex = ?
AND addr.tel LIKE ? AND addr.tel LIKE ?
AND a.province <= ?) AND a.province <= ?)
``` ```
@ -92,7 +94,7 @@ WHERE (
说明: 说明:
* UserDTO.class 查询结果类(resultType) * UserDTO.class 查询结果类(resultType)
* selectAll(UserDO.class) 查询主表全部字段(主表实体类) * selectAll(UserDO.class) 查询主表全部字段(主表实体类)
* select() mp的select策略是覆盖,这里的策略是追加,可以一直select * select() mp的select策略是覆盖,以最后一次为准,这里的策略是追加,可以一直select
主表字段可以用lambda,会自动添加表别名,主表别名默认是 t ,非主表字段必须带别名查询 主表字段可以用lambda,会自动添加表别名,主表别名默认是 t ,非主表字段必须带别名查询
* leftJoin() rightJoin() innerJoin() 传sql片段 格式 (表 + 别名 + 关联条件) * leftJoin() rightJoin() innerJoin() 传sql片段 格式 (表 + 别名 + 关联条件)
* stringQuery() lambda查询转string查询 * stringQuery() lambda查询转string查询