英 ['h?v??]? ?美 ['h?v??]??
n.所有,持有
v.有( have的現(xiàn)在分詞 );(親屬關(guān)系中)接受;拿;買到
mysql HAVING語句 語法
作用:在 SQL 中增加 HAVING 子句原因是,WHERE 關(guān)鍵字無法與合計函數(shù)一起使用。
語法: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