英 ['hævɪŋ] 美 ['hævɪŋ]
n.所有，持有
v.有( have的现在分词 );（亲属关系中）接受;拿;买到
mysql HAVING语句 语法
作用：在 SQL 中增加 HAVING 子句原因是，WHERE 关键字无法与合计函数一起使用。
语法：SELECT column_name, aggregate_function(column_name) FROM table_name WHERE column_name operator value GROUP BY column_name HAVING aggregate_function(column_name) operator value
mysql HAVING语句 示例
//查找订单总金额少于 2000 的客户 SELECT Customer,SUM(OrderPrice) FROM Orders GROUP BY Customer HAVING SUM(OrderPrice)<2000;
