PostgresSQL将多条子查询的统计结果作为查询结果
作者:
李北北 | 来源:发表于
2019-01-15 09:33 被阅读0次SELECT
(SELECT COUNT (*) FROM d_info WHERE type = 0) AS common_total_count, --0普通总数
(SELECT COUNT (*) FROM d_info WHERE type = 0 AND status = 0) AS common_offline_count, -- 00普通离线数量
(SELECT COUNT (*) FROM d_info WHERE type = 0 AND status = 1) AS common_online_count, -- 01普通在线数量
(SELECT COUNT (*) FROM d_info WHERE type = 1) AS special_total_count, --特殊总数量
(SELECT COUNT (*) FROM d_info WHERE type = 1 AND status = 0) AS special_offline_count, -- 10特殊离线数量
(SELECT COUNT (*) FROM d_info WHERE type = 1 AND status = 1) AS special_online_count; -- 11特殊在线数量
本文标题：PostgresSQL将多条子查询的统计结果作为查询结果
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