public enum Aggregate extends Enum<Aggregate> implements IAggregate
| 限定符和类型 | 方法和说明 |
|---|---|
String |
aggregate(String column)
聚合函数表达式
|
static Aggregate |
valueOf(String name)
返回带有指定名称的该类型的枚举常量。
|
static Aggregate[] |
values()
按照声明该枚举类型的常量的顺序, 返回
包含这些常量的数组。
|
public static final Aggregate SUM
public static final Aggregate COUNT
public static final Aggregate MAX
public static final Aggregate MIN
public static final Aggregate AVG
public static final Aggregate GROUP_CONCAT
public static Aggregate[] values()
for (Aggregate c : Aggregate.values()) System.out.println(c);
public static Aggregate valueOf(String name)
name - 要返回的枚举常量的名称。IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量NullPointerException - 如果参数为空值public String aggregate(String column)
IAggregateaggregate 在接口中 IAggregatecolumn - 聚合字段Copyright © 2021. All rights reserved.