mybatis-plus官网详解:https://mp.baomidou.com/guide/wrapper.html#between
eq
-
等于 =
- 例:
eq("name", "老王")--->name = '老王'
allEq
- 全部eq(或者个别isNull)
- 例1:
allEq({id:1,name:"老王",age:null})--->id = 1 and name = '老王' and age is null - 例2:
allEq({id:1,name:"老王",age:null}, false)--->id = 1 and name = '老王'
ne
- 不等于 <>
- 例:
ne("name", "老王")--->name <> '老王'
gt
- 大于 >
- 例:
gt("age", 18)--->age > 18
ge
- 大于等于 >=
- 例:
ge("age", 18)--->age >= 18
lt
- 小于 <
- 例:
lt("age", 18)--->age < 18
le
- 小于等于 <=
- 例:
le("age", 18)--->age <= 18
between
- BETWEEN 值1 AND 值2
- 例:
between("age", 18, 30)--->age between 18 and 30
notBetween
- NOT BETWEEN 值1 AND 值2
- 例:
notBetween("age", 18, 30)--->age not between 18 and 30
like
- LIKE '%值%'
- 例:
like("name", "王")--->name like '%王%'
notLike
- NOT LIKE '%值%'
- 例:
notLike("name", "王")--->name not like '%王%'
likeLeft
- LIKE '%值'
- 例:
likeLeft("name", "王")--->name like '%王'
likeRight
- LIKE '值%'
- 例:
likeRight("name", "王")--->name like '王%'
isNull
- 字段 IS NULL
- 例:
isNull("name")--->name is null
isNotNull
- 字段 IS NOT NULL
- 例:
isNotNull("name")--->name is not null
in
- 字段 IN (value.get(0), value.get(1), ...)
- 例:
in("age",{1,2,3})--->age in (1,2,3)
notIn
- 字段 NOT IN (value.get(0), value.get(1), ...)
- 例:
notIn("age",{1,2,3})--->age not in (1,2,3)
inSql
- 字段 IN ( sql语句 )
- 例:
inSql("age", "1,2,3,4,5,6")--->age in (1,2,3,4,5,6) - 例:
inSql("id", "select id from table where id < 3")--->id in (select id from table where id < 3)
notInSql
- 字段 NOT IN ( sql语句 )
- 例:
notInSql("age", "1,2,3,4,5,6")--->age not in (1,2,3,4,5,6) - 例:
notInSql("id", "select id from table where id < 3")--->id not in (select id from table where id < 3)
groupBy
- 分组：GROUP BY 字段, ...
- 例:
groupBy("id", "name")--->group by id,name
orderByAsc
- 排序：ORDER BY 字段, ... ASC
- 例:
orderByAsc("id", "name")--->order by id ASC,name ASC
orderByDesc
- 排序：ORDER BY 字段, ... DESC
- 例:
orderByDesc("id", "name")--->order by id DESC,name DESC
orderBy
- 排序：ORDER BY 字段, ...
- 例:
orderBy(true, true, "id", "name")--->order by id ASC,name ASC
having
- HAVING ( sql语句 )
- 例:
having("sum(age) > 10")--->having sum(age) > 10 - 例:
having("sum(age) > {0}", 11)--->having sum(age) > 11
func
- func 方法(主要方便在出现if...else下调用不同方法能不断链)
- 例:
func(i -> if(true) {i.eq("id", 1)} else {i.ne("id", 1)})
or
- 拼接 OR
eq("id",1).or().eq("name","老王")--->id = 1 or name = '老王'注意点:主动调用or表示紧接着下一个方法不是用and连接!(不调用or则默认为使用and连接)- OR 嵌套
- 例:
or(i -> i.eq("name", "李白").ne("status", "活着"))--->or (name = '李白' and status <> '活着')
and
- AND 嵌套
- 例:
and(i -> i.eq("name", "李白").ne("status", "活着"))--->and (name = '李白' and status <> '活着')
nested
- 正常嵌套 不带 AND 或者 OR
- 例:
nested(i -> i.eq("name", "李白").ne("status", "活着"))--->(name = '李白' and status <> '活着')
apply
- 拼接 sql
- 注意事项:该方法可用于数据库函数,动态入参的
params对应前面applySql内部的{index}部分.这样是不会有sql注入风险的,反之会有! - 例:
apply("id = 1")--->id = 1 - 例:
apply("date_format(dateColumn,'%Y-%m-%d') = '2008-08-08'")--->date_format(dateColumn,'%Y-%m-%d') = '2008-08-08'") - 例:
apply("date_format(dateColumn,'%Y-%m-%d') = {0}", "2008-08-08")--->date_format(dateColumn,'%Y-%m-%d') = '2008-08-08'")
last
- 无视优化规则直接拼接到 sql 的最后
- 注意事项:只能调用一次,多次调用以最后一次为准 有sql注入的风险,请谨慎使用
- 例:
last("limit 1")
exists
- 拼接 EXISTS ( sql语句 )
- 例:
exists("select id from table where age = 1")--->exists (select id from table where age = 1)
notExists
- 拼接 NOT EXISTS ( sql语句 )
- 例:
notExists("select id from table where age = 1")--->not exists (select id from table where age = 1)