一条sql语句实现统计查询
如图：程序员在进行如下的统计时，现在提供两种实现方案：
方案一：运用 SEKECT CASE WHEN
EXPLAIN SELECT count(*) AS '总数', count( CASE oup.status WHEN '1' THEN oup.id END ) AS '未绑定', count( CASE oup.status WHEN '2' THEN oup.id END ) AS '已绑定', count( CASE oup.status WHEN '3' THEN oup.id END )AS '冻结中' FROM lab_org_uc_passport oup
显示结果：(按行显示)
方案二：
SELECT count(*) AS '总数' FROM lab_org_uc_passport oup UNION ALL SELECT count(*) AS '未绑定' FROM lab_org_uc_passport oup WHERE oup.status = '1' UNION ALL SELECT count(*) AS '未绑定' FROM lab_org_uc_passport oup WHERE oup.status = '2' UNION ALL SELECT count(*) AS '未绑定' FROM lab_org_uc_passport oup WHERE oup.status = '3'
显示结果(按列显示)
34
3
10
21
查看更多关于一条sql语句实现统计查询 - mysql数据库栏目 - 自学的详细内容...