這個查詢中斜線字符的含義是什麼?這與MySql數據庫一起使用。斜槓在SQL查詢中意味着什麼?
SELECT Channel, COUNT(Channel) AS Total, COUNT(Channel)/(SELECT COUNT(*) FROM UserClicks WHERE (Date > '2009-12-1' AND Date < '2010-1-1') AND RoleType='member') AS Percent FROM UserClicks WHERE (Date > '2009-12-1' AND Date < '2010-1-1') AND RoleType='member' GROUP BY Channel ORDER BY Total DESC
更新:對不起,愚蠢的問題! = P
嘿 - 至少你問,因爲你,而不是僅僅聳肩,讓它作爲傳遞只是一些好奇的魔...:d – 2010-01-11 18:18:01
還有哪些地方可以在60秒內回答5次這樣的問題? – Hogan 2010-01-11 18:19:04
雖然分工很明顯,但我對整體領域被稱爲「百分比」感到懷疑,實際上它看起來更像是一個比例(0..1) – 2010-01-11 18:31:55