Detailed explanation of mybatisPlus condition parameters

Detailed explanation of mybatis-plus official website: https://mp.baomidou.com/guide/wrapper.html#between

eq

• Equal to =

• Example:  eq("name", "老王")--->name = '老王'

allEq

• All eq (or individual isNull)
• Example 1:  allEq({id:1,name:"老王",age:null})--->id = 1 and name = '老王' and age is null
• Example 2:  allEq({id:1,name:"老王",age:null}, false)--->id = 1 and name = '老王'

born

• Not equal to <>
• Example:  ne("name", "老王")--->name <> '老王'

gt

• Greater than>
• Example:  gt("age", 18)--->age > 18

give

• Greater than or equal to >=
• Example:  ge("age", 18)--->age >= 18

lt

• Less than
• Example:  lt("age", 18)--->age < 18

the

• Less than or equal to <=
• Example:  le("age", 18)--->age <= 18

between

• BETWEEN value 1 AND value 2
• Example:  between("age", 18, 30)--->age between 18 and 30

notBetween

• NOT BETWEEN value 1 AND value 2
• Example:  notBetween("age", 18, 30)--->age not between 18 and 30

like

• LIKE'%value%'
• Example:  like("name", "王")--->name like '%王%'

notLike

• NOT LIKE '%值%'
• Example:  notLike("name", "王")--->name not like '%王%'

likeLeft

• LIKE'% value'
• Example:  likeLeft("name", "王")--->name like '%王'

likeRight

• LIKE'value%'
• Example:  likeRight("name", "王")--->name like '王%'

isNull

• Field IS NULL
• Example:  isNull("name")--->name is null

isNotNull

• Field IS NOT NULL
• Example:  isNotNull("name")--->name is not null

in

• 字段 IN (value.get(0), value.get(1), ...)
• Example:  in("age",{1,2,3})--->age in (1,2,3)

notIn

• 字段 NOT IN (value.get(0), value.get(1), ...)
• Example:  notIn("age",{1,2,3})--->age not in (1,2,3)

inSql

• Field IN (sql statement)
• Example:  inSql("age", "1,2,3,4,5,6")--->age in (1,2,3,4,5,6)
• Example:  inSql("id", "select id from table where id < 3")--->id in (select id from table where id < 3)

notInSql

• Field NOT IN (sql statement)
• Example:  notInSql("age", "1,2,3,4,5,6")--->age not in (1,2,3,4,5,6)
• Example:  notInSql("id", "select id from table where id < 3")--->id not in (select id from table where id < 3)

groupBy

• Grouping: GROUP BY field, ...
• Example:  groupBy("id", "name")--->group by id,name

orderByAsc

• Sort: ORDER BY field, ... ASC
• Example:  orderByAsc("id", "name")--->order by id ASC,name ASC

orderByDesc

• Sort: ORDER BY field, ... DESC
• Example:  orderByDesc("id", "name")--->order by id DESC,name DESC

orderBy

• Sorting: ORDER BY field, ...
• Example:  orderBy(true, true, "id", "name")--->order by id ASC,name ASC

having

• HAVING (sql statement)
• Example:  having("sum(age) > 10")--->having sum(age) > 10
• Example:  having("sum(age) > {0}", 11)--->having sum(age) > 11

func

• func method (mainly convenient to call different methods in the presence of if...else can be chained continuously)
• Example: func(i -> if(true) {i.eq("id", 1)} else {i.ne("id", 1)})

or

• Splicing OR
• eq("id",1).or().eq("name","老王")--->id = 1 or name = '老王'
• 注意点:Active call ormeans that the next method is not andconnected! (If oryou don't call it, the default is to use the andconnection)
• OR nesting
• Example:  or(i -> i.eq("name", "李白").ne("status", "活着"))--->or (name = '李白' and status <> '活着')

and

• AND nested
• Example:  and(i -> i.eq("name", "李白").ne("status", "活着"))--->and (name = '李白' and status <> '活着')

nested

• Normal nesting without AND or OR
• Example:  nested(i -> i.eq("name", "李白").ne("status", "活着"))--->(name = '李白' and status <> '活着')

apply

• Splicing sql
• Note: This method can be used for database functions, and the dynamic input parameters paramscorrespond to the previous applySqlinternal {index}parts. This way there will be no risk of SQL injection, and vice versa!
• Example:  apply("id = 1")--->id = 1
• Example:  apply("date_format(dateColumn,'%Y-%m-%d') = '2008-08-08'")--->date_format(dateColumn,'%Y-%m-%d') = '2008-08-08'")
• Example:  apply("date_format(dateColumn,'%Y-%m-%d') = {0}", "2008-08-08")--->date_format(dateColumn,'%Y-%m-%d') = '2008-08-08'")

last

• Ignore the optimization rules directly spliced ​​to the end of sql
• Note: You can only call it once, and multiple calls are subject to the risk of SQL injection. Please use it with caution
• Example: last("limit 1")

exists

• Splicing EXISTS (sql statement)
• Example:  exists("select id from table where age = 1")--->exists (select id from table where age = 1)

notExists

• Splicing NOT EXISTS (sql statement)
• Example:  notExists("select id from table where age = 1")--->not exists (select id from table where age = 1)