摘要:
参考文献http://www.w3school.com.cn/sql/sql_having.aspHAVING 子句在 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。SQL HAVING 语法SELECT column_name, aggregate_function(column_name)FROM table_nameWHERE column_name operator valueGROUP BY column_nameHAVING aggregate_function(column_name) operator valueSQL HAVING 实例我 阅读全文