类 net.oschina.durcframework.easymybatis.query.projection.Projection
的使用

使用Projection的程序包

程序包	说明
net.oschina.durcframework.easymybatis.query.projection

net.oschina.durcframework.easymybatis.query.projection中Projection的使用

返回Projection的net.oschina.durcframework.easymybatis.query.projection中的方法

限定符和类型	方法和说明
static Projection	Projections.avg(String column) 聚合函数,总数avg("age") ==> avg(age)
static Projection	Projections.avg(String column, String alias) 聚合函数,总数avg("age","avgAge") ==> avg(age) AS avgAge
static Projection	Projections.column(String columnName) 自定义列
static Projection	Projections.column(String columnName, String alias) 自定义列
static Projection	Projections.count() 聚合函数,总数count() ==> COUNT(*)
static Projection	Projections.count(String alias) 聚合函数,总数count("cnt") ==> COUNT(*) AS cnt
static Projection	Projections.count(String column, String alias) 聚合函数,总数count("id","cnt") ==> COUNT(id) AS cnt
static Projection	Projections.max(String column) 聚合函数最大值,max("age") ==> max(age)
static Projection	Projections.max(String column, String alias) 聚合函数最大值,max("age","maxAge") ==> max(age) AS maxAge
static Projection	Projections.min(String column) 聚合函数最小值,min("age") ==> min(age)
static Projection	Projections.min(String column, String alias) 聚合函数最小值,min("age","minAge") ==> min(age) AS minAge
static Projection	Projections.sum(String column) 聚合函数总和,sum("age") ==> sum(age)
static Projection	Projections.sum(String column, String alias) 聚合函数总和,sum("age","sumAge") ==> sum(age) AS sumAge

返回变量类型为Projection的类型的net.oschina.durcframework.easymybatis.query.projection中的方法

限定符和类型	方法和说明
List<Projection>	ProjectionList.getProjections()

参数类型为Projection的net.oschina.durcframework.easymybatis.query.projection中的方法

限定符和类型	方法和说明
ProjectionList	ProjectionList.add(Projection projection)
ProjectionQuery	ProjectionQuery.addProjection(Projection projection) 添加聚合列

类型变量类型为Projection的net.oschina.durcframework.easymybatis.query.projection中的方法参数

限定符和类型	方法和说明
void	ProjectionList.setProjections(List<Projection> projections)