SET FOREIGN_KEY_CHECKS=0; -- ---------------------------- -- Table structure for tabname -- ---------------------------- DROP TABLE IF EXISTS `tabname`; CREATE TABLE `tabname` ( `Id` int(11) NOT NULL AUTO_INCREMENT, `Name` varchar(20) DEFAULT NULL, `Date` date DEFAULT NULL, `Scount` int(11) DEFAULT NULL, PRIMARY KEY (`Id`) ) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8; -- ---------------------------- -- Records of tabname -- ---------------------------- INSERT INTO `tabname` VALUES (‘1‘, ‘小说‘, ‘2013-09-01‘, ‘10000‘); INSERT INTO `tabname` VALUES (‘2‘, ‘微信‘, ‘2013-09-01‘, ‘20000‘); INSERT INTO `tabname` VALUES (‘3‘, ‘小说‘, ‘2013-09-02‘, ‘30000‘); INSERT INTO `tabname` VALUES (‘4‘, ‘微信‘, ‘2013-09-02‘, ‘35000‘); INSERT INTO `tabname` VALUES (‘5‘, ‘小说‘, ‘2013-09-03‘, ‘31000‘); INSERT INTO `tabname` VALUES (‘6‘, ‘微信‘, ‘2013-09-03‘, ‘36000‘); INSERT INTO `tabname` VALUES (‘7‘, ‘小说‘, ‘2013-09-04‘, ‘35000‘); INSERT INTO `tabname` VALUES (‘8‘, ‘微信‘, ‘2013-09-04‘, ‘38000‘); INSERT INTO `tabname` VALUES (‘9‘, ‘微信‘, ‘2013-09-01‘, ‘30000‘);
查询结果:
id Name Date Scount1 小说 2013-09-01 10000 2 微信 2013-09-01 20000 3 小说 2013-09-02 30000 4 微信 2013-09-02 35000 5 小说 2013-09-03 31000 6 微信 2013-09-03 36000 7 小说 2013-09-04 35000 8 微信 2013-09-04 38000 9 微信 2013-09-01 30000
执行:
SELECT CASE NAME WHEN ‘小说‘ THEN Scount ELSE 0 END 小说, CASE NAME WHEN ‘微信‘ THEN Scount ELSE 0 END 微信 FROM TabName where Date=‘2013-09-01‘
得到:
小说 微信 10000 0 0 20000 0 30000
执行:
SELECT SUM(CASE NAME WHEN ‘小说‘ THEN Scount ELSE 0 END ) 小说, SUM(CASE NAME WHEN ‘微信‘ THEN Scount ELSE 0 END ) 微信 FROM TabName where Date=‘2013-09-01‘
得到:
小说 微信 10000 50000
执行:
SELECT Date , SUM(CASE NAME WHEN ‘小说‘ THEN Scount ELSE 0 END ) 小说, SUM(CASE NAME WHEN ‘微信‘ THEN Scount ELSE 0 END ) 微信 FROM TabName GROUP BY Date
得到:
Date 小说 微信2013-09-01 10000 50000 2013-09-02 30000 35000 2013-09-03 31000 36000 2013-09-04 35000 38000
时间: 2024-11-05 12:28:13