com.dynamic.sql.core.column.function.aggregate

类 StdDev

java.lang.Object

com.dynamic.sql.core.column.function.AbstractColumFunction

com.dynamic.sql.core.column.function.ColumnFunctionDecorator

com.dynamic.sql.core.column.function.aggregate.StdDev

所有已实现的接口:

ColumnArithmetic, AggregateFunction, ColumFunction, WindowsFunction, Serializable

public class StdDev
extends ColumnFunctionDecorator
implements AggregateFunction, WindowsFunction

计算指定列的标准差。

例如：STDDEV(salary) 返回薪资列的标准差。

另请参阅:

序列化表格

字段概要

从类继承的字段 com.dynamic.sql.core.column.function.ColumnFunctionDecorator

delegateFunction, parameterBinder, value

从类继承的字段 com.dynamic.sql.core.column.function.AbstractColumFunction

aliasTableMap, arithmeticParameterBinder, arithmeticSql, dataSourceName

构造器概要

构造器

构造器和说明
StdDev(AbstractColumFunction delegateFunction)
StdDev(FieldFn<T,F> fn)
StdDev(String tableAlias, FieldFn<T,F> fn)

方法概要

限定符和类型	方法和说明
String	apply(Over over)
String	getFunctionToString(SqlDialect sqlDialect, Version version)

从类继承的方法 com.dynamic.sql.core.column.function.ColumnFunctionDecorator

getOriginColumnFn, getParameterBinder, getTableAlias

从类继承的方法 com.dynamic.sql.core.column.function.AbstractColumFunction

add, add, add, divide, divide, divide, getAliasTableMap, getArithmeticParameterBinder, getArithmeticSql, getDataSourceName, multiply, multiply, multiply, setAliasTableMap, setDataSourceName, subtract, subtract, subtract

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 com.dynamic.sql.core.column.function.ColumFunction

getOriginColumnFn, getParameterBinder, getTableAlias, setTableAlias

构造器详细资料

StdDev

public StdDev(AbstractColumFunction delegateFunction)

StdDev

public StdDev(FieldFn<T,F> fn)

StdDev

public StdDev(String tableAlias,
              FieldFn<T,F> fn)

方法详细资料

apply

public String apply(Over over)

指定者:

apply 在接口中 WindowsFunction

getFunctionToString

public String getFunctionToString(SqlDialect sqlDialect,
                                  Version version)
                           throws UnsupportedOperationException

指定者:

getFunctionToString 在接口中 ColumFunction

抛出:

UnsupportedOperationException