QueryWrapper method explained

Inherited from AbstractWrapper, its own internal property entity is also used to generate where conditions
and LambdaQueryWrapper, which can be obtained through the new QueryWrapper().lambda() method.

queryWrapper.lt() - less than
queryWrapper.le() - less than or equal to
queryWrapper.gt() - greater than
queryWrapper.ge() - greater than or equal to
queryWrapper.eq() -- equal to
queryWrapper.ne() -- not equal to
queryWrapper.betweeen("age", 10, 20) -- age between values ​​10 and 20
queryWrapper.notBetweeen("age", 10, 20) -- age is not between values ​​10 and 20
queryWrapper.like("attribute", "value") -- fuzzy query matches value '%value%'
queryWrapper.notLike("attribute", "value") - fuzzy query does not match the value '% value%'
queryWrapper.likeLeft("attribute", "value") - fuzzy query matches the last value '% value'
queryWrapper.likeRight("attribute", "value") - fuzzy query matches the first value 'value %'
queryWrapper.isNull() - value is empty or null
queryWrapper.isNotNull() -- value is not empty or null
queryWrapper.in("property", condition, condition) -- value that matches multiple conditions
queryWrapper.notIn("property", condition, condition) -- noValues ​​matching multiple criteria
queryWrapper.or() -- or
queryWrapper.and() -- and
queryWrapper.orderByAsc("property") -- sorted by property in ascending order
queryWrapper.orderByDesc("attribute") - sort in descending order according to the attribute
queryWrapper.inSql("sql statement") - the value that conforms to the sql statement
queryWrapper.notSql("sql statement") - does not conform to the SQL statementvalue
queryWrapper.esists("SQL statement") - query for values ​​that match the SQL statement
queryWrapper.notEsists("SQL statement") - query for values ​​that do not match the SQL statement

Let me introduce myself first. The editor graduated from Jiaotong University in 2013. I worked in a small company and went to big factories such as Huawei and OPPO. I joined Ali in 2018, until now.I know that most junior and intermediate java engineers want to upgrade their skills, they often need to explore their own growth or sign up to study, but for training institutions, the tuition fee is nearly 10,000 yuan, which is really stressful.Self-learning that is not systematic is very inefficient and lengthy, and it is easy to hit the ceiling and the technology stops.Therefore, I collected a "full set of learning materials for java development" for everyone. The original intention is very simple. I hope to help friends who want to learn by themselves but don't know where to start, and at the same time reduce everyone's burden.Add the business card below to get a full set of learning materials