MySQL实现显示百分比显示和前百分之几的方法

123456790

目录

• 要求
  
• 实现代码
  
• 数据库
  

前几天一个朋友让我帮忙写的，随手记录一下，感觉难度也不大，就是写的时候遇到一些问题。优化方便做得不太好。有好的优化方法欢迎分享！（数据库在文章结尾）

要求

1）查询所有时间内，所有产品销售金额占比，按占比大小降序排序，筛选累计占比在前80%的产品，结果输出排名产品名称销售金额占比累计占比。
2）查询所有时间内，各个国家的销售情况，销售合计金额大于10000视为业绩合格,
否则为不合格，结果输出国家销售金额业绩情况。
3）查询中国、英国每个月份的销售情况，2020年8月份销售合计金额大于10000视为业绩合格，否则为不合格，2020年9月份销售合计金额大于12000视为业绩合格，否则为不合格，结果输出月份中国销售业绩、英国销售业绩。

实现代码

1）

1. SELECT a.productID 产品ID,(a.sale_amount * b.price) 销售金额,CONCAT((a.sale_amount * b.price / (select SUM(aa.sale_amount * bb.price) m from 2002a aa left join 2002b bb on aa.productID = bb.productID)) * 100,"%") percent
   
2. FROM (select @rownum:=0) r,2002a a,2002b b
   
3. WHERE (@rownum:=@rownum+1)<=(select round(count(distinct a.productid)*0.8) from 2002a a, 2002b b where a.productID = b.productID)
   
4. AND a.productID = b.productID GROUP BY a.productID ORDER BY (a.sale_amount * b.price) DESC;

复制代码

2）

1. SELECT country 国家,SUM(price*sale_amount) 销售金额,if(SUM(price*sale_amount)>10000,'合格','不合格') 业绩情况
   
2. FROM 2002a a,2002b b,2002c c WHERE a.productID=b.productID AND a.customID=c.customID GROUP BY country;

复制代码

3）

1. SELECT date_format(zTime,'%Y-%m') 月份,SUM(price*sale_amount) 销售金额,
   
2. if((date_format(zTime,'%Y-%m')='2020-08' AND SUM(price*sale_amount)>10000) OR (date_format(zTime,'%Y-%m')='2020-09' AND SUM(price*sale_amount)>13000) AND country='中国','合格','不合格') 中国销售业绩,
   
3. if((date_format(zTime,'%Y-%m')='2020-08' OR SUM(price*sale_amount)>10000) AND (date_format(zTime,'%Y-%m')='2020-09' AND SUM(price*sale_amount)>13000) AND country='英国','合格','不合格') 英国销售业绩
   
4. FROM 2002a a,2002b b,2002c c
   
5. WHERE a.productID=b.productID AND a.customID=c.customID AND country IN('中国','英国') AND (date_format(zTime,'%Y-%m')='2020-09' OR date_format(zTime,'%Y-%m')='2020-08') GROUP BY date_format(zTime,'%Y-%m');

复制代码

实现查询结果显示前百分之八十的方法：
实现百分比显示：
首先认识两个函数concat()和left()、TRUNCATE(A,B)
CONCAT(str1,str2,...)拼接字符串，返回来自于参数连结的字符串。如果任何参数是NULL， 返回NULL。可以拼接多个。
LEFT(str,length)从左开始截取字符串.说明：left(被截取字段，截取长度)
TRUNCATE(A,B)返回被舍去至小数点后B位的数字A。若B的值为0,则结果不带有小数点或不带有小数部分。可以将B设为负数,若要截去(归零)A小数点左起第B位开始后面所有低位的值.，所有数字的舍入方向都接近于零
结合一下（我上面的代码没使用left）：concat ( left (数值1 / 数值2 *100,5),'%') as 投诉率
示例：

1. SELECT id,CONCAT(TRUNCATE(passScore / (danScore+panScore+duoScore) *100,2),'%') as 成绩与总分比
   
2. FROM aqsc_kaoshi_record;

复制代码

实现mysql查询前百分之几的数据（这里是80％）
mysql不支持top和rowid，使用limit的方式也行不通。所以使用下面这种方式：

1. SELECT a.*
   
2. FROM (SELECT @rownum:=0) r,2002a a
   
3. WHERE (@rownum:=@rownum+1)<=(select round(count(*)*0.8) from 2002a);<font face="Arial, Verdana, sans-serif"><span style="white-space: normal;"> </span></font>

复制代码

这里的rownum只是个变量名，也可以是用其他的
将student表的grade从大到小排序后的前20%案例：

1. SELECT @rownum:=@rownum+1,student.*
   
2. FROM (select @rownum:=0) row ,(select * from student order by student.grade desc) student ##排序
   
3. WHERE @rownum<(select round(count(*)/4) from student)<font face="Arial, Verdana, sans-serif"><span style="white-space: normal;"> </span></font>

复制代码

除了if外实现判断显示的示例：

1. select
   
2.        sum(case when sex = '男' then 1 else 0 end)   /* 这是求男生人数 */
   
3.        sum(case when sex = '女' then 1 else 0 end)   /* 这是求女生人数 */
   
4. from student

复制代码

数据库

以下是数据库完整代码：

1. /*
   
2. Navicat MySQL Data Transfer
   
3. 
   
4. Source Server         : First
   
5. Source Server Version : 80011
   
6. Source Host           : localhost:3306
   
7. Source Database       : fr_test_sql
   
8. 
   
9. Target Server Type    : MYSQL
   
10. Target Server Version : 80011
    
11. File Encoding         : 65001
    
12. 
    
13. Date: 2021-12-18 16:06:19
    
14. */
    
15. 
    
16. SET FOREIGN_KEY_CHECKS=0;
    
17. 
    
18. -- ----------------------------
    
19. -- Table structure for `2002a`
    
20. -- ----------------------------
    
21. DROP TABLE IF EXISTS `2002a`;
    
22. CREATE TABLE `2002a` (
    
23.   `orderID` varchar(255) NOT NULL,
    
24.   `zTime` date NOT NULL,
    
25.   `productID` varchar(255) NOT NULL,
    
26.   `sale_amount` int(11) NOT NULL,
    
27.   `customID` varchar(255) NOT NULL,
    
28.   PRIMARY KEY (`orderID`)
    
29. ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
    
30. 
    
31. -- ----------------------------
    
32. -- Records of 2002a
    
33. -- ----------------------------
    
34. INSERT INTO `2002a` VALUES ('O001', '2020-09-10', 'P010', '96', 'C008');
    
35. INSERT INTO `2002a` VALUES ('O002', '2020-08-29', 'P008', '38', 'C007');
    
36. INSERT INTO `2002a` VALUES ('O003', '2020-08-10', 'P007', '97', 'C008');
    
37. INSERT INTO `2002a` VALUES ('O004', '2020-09-27', 'P005', '62', 'C006');
    
38. INSERT INTO `2002a` VALUES ('O005', '2020-08-17', 'P007', '37', 'C009');
    
39. INSERT INTO `2002a` VALUES ('O006', '2020-09-06', 'P006', '3', 'C005');
    
40. INSERT INTO `2002a` VALUES ('O007', '2020-08-30', 'P009', '86', 'C007');
    
41. INSERT INTO `2002a` VALUES ('O008', '2020-09-04', 'P001', '34', 'C007');
    
42. INSERT INTO `2002a` VALUES ('O009', '2020-09-09', 'P003', '99', 'C004');
    
43. INSERT INTO `2002a` VALUES ('O010', '2020-09-06', 'P002', '65', 'C010');
    
44. INSERT INTO `2002a` VALUES ('O011', '2020-08-08', 'P005', '11', 'C002');
    
45. INSERT INTO `2002a` VALUES ('O012', '2020-09-20', 'P002', '3', 'C008');
    
46. INSERT INTO `2002a` VALUES ('O013', '2020-08-15', 'P004', '9', 'C004');
    
47. INSERT INTO `2002a` VALUES ('O014', '2020-08-28', 'P007', '99', 'C010');
    
48. INSERT INTO `2002a` VALUES ('O015', '2020-08-23', 'P003', '3', 'C005');
    
49. INSERT INTO `2002a` VALUES ('O016', '2020-08-08', 'P006', '51', 'C008');
    
50. INSERT INTO `2002a` VALUES ('O017', '2020-09-04', 'P009', '99', 'C002');
    
51. INSERT INTO `2002a` VALUES ('O018', '2020-08-12', 'P007', '86', 'C003');
    
52. INSERT INTO `2002a` VALUES ('O019', '2020-09-22', 'P001', '73', 'C005');
    
53. INSERT INTO `2002a` VALUES ('O020', '2020-08-03', 'P009', '22', 'C006');
    
54. INSERT INTO `2002a` VALUES ('O021', '2020-08-22', 'P007', '54', 'C006');
    
55. INSERT INTO `2002a` VALUES ('O022', '2020-09-29', 'P005', '59', 'C005');
    
56. INSERT INTO `2002a` VALUES ('O023', '2020-08-15', 'P003', '45', 'C006');
    
57. INSERT INTO `2002a` VALUES ('O024', '2020-09-12', 'P001', '10', 'C004');
    
58. INSERT INTO `2002a` VALUES ('O025', '2020-08-23', 'P004', '56', 'C008');
    
59. INSERT INTO `2002a` VALUES ('O026', '2020-09-17', 'P003', '57', 'C004');
    
60. INSERT INTO `2002a` VALUES ('O027', '2020-08-23', 'P002', '73', 'C003');
    
61. INSERT INTO `2002a` VALUES ('O028', '2020-09-22', 'P003', '50', 'C008');
    
62. INSERT INTO `2002a` VALUES ('O029', '2020-09-22', 'P003', '70', 'C007');
    
63. INSERT INTO `2002a` VALUES ('O030', '2020-08-13', 'P006', '15', 'C002');
    
64. 
    
65. -- ----------------------------
    
66. -- Table structure for `2002b`
    
67. -- ----------------------------
    
68. DROP TABLE IF EXISTS `2002b`;
    
69. CREATE TABLE `2002b` (
    
70.   `productID` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
    
71.   `productName` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
    
72.   `price` decimal(10,0) NOT NULL,
    
73.   PRIMARY KEY (`productID`)
    
74. ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
    
75. 
    
76. -- ----------------------------
    
77. -- Records of 2002b
    
78. -- ----------------------------
    
79. INSERT INTO `2002b` VALUES ('P001', '产品A', '29');
    
80. INSERT INTO `2002b` VALUES ('P002', '产品B', '50');
    
81. INSERT INTO `2002b` VALUES ('P003', '产品C', '42');
    
82. INSERT INTO `2002b` VALUES ('P004', '产品D', '59');
    
83. INSERT INTO `2002b` VALUES ('P005', '产品E', '49');
    
84. INSERT INTO `2002b` VALUES ('P006', '产品F', '10');
    
85. INSERT INTO `2002b` VALUES ('P007', '产品G', '23');
    
86. INSERT INTO `2002b` VALUES ('P008', '产品H', '24');
    
87. INSERT INTO `2002b` VALUES ('P009', '产品I', '50');
    
88. INSERT INTO `2002b` VALUES ('P010', '产品J', '64');
    
89. 
    
90. -- ----------------------------
    
91. -- Table structure for `2002c`
    
92. -- ----------------------------
    
93. DROP TABLE IF EXISTS `2002c`;
    
94. CREATE TABLE `2002c` (
    
95.   `customID` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
    
96.   `customName` varchar(255) NOT NULL,
    
97.   `country` varchar(255) NOT NULL,
    
98.   PRIMARY KEY (`customID`)
    
99. ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
    
100. 
     
101. -- ----------------------------
     
102. -- Records of 2002c
     
103. -- ----------------------------
     
104. INSERT INTO `2002c` VALUES ('C001', '客户A', '中国');
     
105. INSERT INTO `2002c` VALUES ('C002', '客户B', '法国');
     
106. INSERT INTO `2002c` VALUES ('C003', '客户C', '中国');
     
107. INSERT INTO `2002c` VALUES ('C004', '客户D', '英国');
     
108. INSERT INTO `2002c` VALUES ('C005', '客户E', '美国');
     
109. INSERT INTO `2002c` VALUES ('C006', '客户F', '中国');
     
110. INSERT INTO `2002c` VALUES ('C007', '客户G', '法国');
     
111. INSERT INTO `2002c` VALUES ('C008', '客户H', '英国');
     
112. INSERT INTO `2002c` VALUES ('C009', '客户I', '美国');
     
113. INSERT INTO `2002c` VALUES ('C010', '客户H', '英国');
     
114. 
     
115. -- ----------------------------
     
116. -- Table structure for `2003_a`
     
117. -- ----------------------------
     
118. DROP TABLE IF EXISTS `2003_a`;
     
119. CREATE TABLE `2003_a` (
     
120.   `CLASSNO` varchar(255) DEFAULT NULL,
     
121.   `STUDENTNO` varchar(255) DEFAULT NULL,
     
122.   `GRADE` varchar(255) DEFAULT NULL
     
123. ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
     
124. 
     
125. -- ----------------------------
     
126. -- Records of 2003_a
     
127. -- ----------------------------
     
128. INSERT INTO `2003_a` VALUES ('CLASS1', '1001', '86');
     
129. INSERT INTO `2003_a` VALUES ('CLASS1', '1002', '60');
     
130. INSERT INTO `2003_a` VALUES ('CLASS1', '1003', '85');
     
131. INSERT INTO `2003_a` VALUES ('CLASS1', '1004', '73');
     
132. INSERT INTO `2003_a` VALUES ('CLASS1', '1005', '95');
     
133. INSERT INTO `2003_a` VALUES ('CLASS1', '1006', '61');
     
134. INSERT INTO `2003_a` VALUES ('CLASS1', '1007', '77');
     
135. INSERT INTO `2003_a` VALUES ('CLASS1', '1008', '71');
     
136. INSERT INTO `2003_a` VALUES ('CLASS1', '1009', '61');
     
137. INSERT INTO `2003_a` VALUES ('CLASS1', '1010', '78');
     
138. INSERT INTO `2003_a` VALUES ('CLASS2', '2001', '81');
     
139. INSERT INTO `2003_a` VALUES ('CLASS2', '2002', '54');
     
140. INSERT INTO `2003_a` VALUES ('CLASS2', '2003', '57');
     
141. INSERT INTO `2003_a` VALUES ('CLASS2', '2004', '75');
     
142. INSERT INTO `2003_a` VALUES ('CLASS2', '2005', '98');
     
143. INSERT INTO `2003_a` VALUES ('CLASS2', '2006', '75');
     
144. INSERT INTO `2003_a` VALUES ('CLASS2', '2007', '76');
     
145. INSERT INTO `2003_a` VALUES ('CLASS2', '2008', '58');
     
146. INSERT INTO `2003_a` VALUES ('CLASS2', '2009', '73');
     
147. INSERT INTO `2003_a` VALUES ('CLASS2', '2010', '55');
     
148. INSERT INTO `2003_a` VALUES ('CLASS3', '3001', '42');
     
149. INSERT INTO `2003_a` VALUES ('CLASS3', '3002', '90');
     
150. INSERT INTO `2003_a` VALUES ('CLASS3', '3003', '81');
     
151. INSERT INTO `2003_a` VALUES ('CLASS3', '3004', '97');
     
152. INSERT INTO `2003_a` VALUES ('CLASS3', '3005', '68');
     
153. INSERT INTO `2003_a` VALUES ('CLASS3', '3006', '72');
     
154. INSERT INTO `2003_a` VALUES ('CLASS3', '3007', '81');
     
155. INSERT INTO `2003_a` VALUES ('CLASS3', '3008', '79');
     
156. INSERT INTO `2003_a` VALUES ('CLASS3', '3009', '87');
     
157. INSERT INTO `2003_a` VALUES ('CLASS3', '3010', '59');
     
158. 
     
159. -- ----------------------------
     
160. -- Table structure for `2004_a`
     
161. -- ----------------------------
     
162. DROP TABLE IF EXISTS `2004_a`;
     
163. CREATE TABLE `2004_a` (
     
164.   `TYEAR` varchar(255) DEFAULT NULL,
     
165.   `TMONTH` varchar(255) DEFAULT NULL,
     
166.   `SALE_MONEY` varchar(255) DEFAULT NULL
     
167. ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
     
168. 
     
169. -- ----------------------------
     
170. -- Records of 2004_a
     
171. -- ----------------------------
     
172. INSERT INTO `2004_a` VALUES ('2019', '10', '1279');
     
173. INSERT INTO `2004_a` VALUES ('2019', '11', '2316');
     
174. INSERT INTO `2004_a` VALUES ('2019', '12', '2090');
     
175. INSERT INTO `2004_a` VALUES ('2020', '01', '1086');
     
176. INSERT INTO `2004_a` VALUES ('2020', '02', '2046');
     
177. INSERT INTO `2004_a` VALUES ('2020', '03', '0');
     
178. INSERT INTO `2004_a` VALUES ('2020', '04', '2959');
     
179. INSERT INTO `2004_a` VALUES ('2020', '05', '1314');
     
180. INSERT INTO `2004_a` VALUES ('2020', '06', '2751');
     
181. INSERT INTO `2004_a` VALUES ('2020', '07', '1492');
     
182. INSERT INTO `2004_a` VALUES ('2020', '08', '1414');
     
183. INSERT INTO `2004_a` VALUES ('2020', '09', '2895');
     
184. INSERT INTO `2004_a` VALUES ('2020', '10', '2999');
     
185. INSERT INTO `2004_a` VALUES ('2020', '11', '1982');
     
186. INSERT INTO `2004_a` VALUES ('2020', '12', '2793');
     
187. INSERT INTO `2004_a` VALUES ('2021', '01', '2156');
     
188. INSERT INTO `2004_a` VALUES ('2021', '02', '1733');
     
189. INSERT INTO `2004_a` VALUES ('2021', '03', '2184');
     
190. 
     
191. -- ----------------------------
     
192. -- Table structure for `t_user`
     
193. -- ----------------------------
     
194. DROP TABLE IF EXISTS `t_user`;
     
195. CREATE TABLE `t_user` (
     
196.   `user_id` int(11) NOT NULL AUTO_INCREMENT COMMENT '编号',
     
197.   `user_access` varchar(20) NOT NULL DEFAULT '' COMMENT '账号',
     
198.   `user_token` varchar(20) NOT NULL DEFAULT '123456' COMMENT '密码',
     
199.   `user_nick` varchar(20) NOT NULL DEFAULT '虾米' COMMENT '昵称',
     
200.   `user_gender` bit(1) NOT NULL DEFAULT b'1' COMMENT '1为男，0为女',
     
201.   `user_hobbies` varchar(20) NOT NULL COMMENT '爱好',
     
202.   `user_type` int(1) NOT NULL DEFAULT '1' COMMENT '类型',
     
203.   PRIMARY KEY (`user_id`),
     
204.   UNIQUE KEY `uk_user_access` (`user_access`) USING BTREE
     
205. ) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
     
206. 
     
207. -- ----------------------------
     
208. -- Records of t_user
     
209. -- ----------------------------
     
210. INSERT INTO `t_user` VALUES ('1', 'cqswxy', '111111', '重庆商务', '', '编程,游戏', '3');
     
211. INSERT INTO `t_user` VALUES ('2', 'zjczjc', '222222', '俊采星驰', '', '编程,学习', '2');
     
212. INSERT INTO `t_user` VALUES ('3', 'cetoox', '333333', '光速为零', '', '游戏,学习', '1');
     
213. INSERT INTO `t_user` VALUES ('4', 'XXX', '23', 'XXX', '', 'XXXX', '1');
     
214. INSERT INTO `t_user` VALUES ('6', 'dasda', '123456', '虾米', '', 'asd', '5');
     
215. 
     
216. -- ----------------------------
     
217. -- Table structure for `t_user_type`
     
218. -- ----------------------------
     
219. DROP TABLE IF EXISTS `t_user_type`;
     
220. CREATE TABLE `t_user_type` (
     
221.   `user_type_id` int(11) NOT NULL AUTO_INCREMENT,
     
222.   `user_type_name` varchar(2) NOT NULL,
     
223.   PRIMARY KEY (`user_type_id`)
     
224. ) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
     
225. 
     
226. -- ----------------------------
     
227. -- Records of t_user_type
     
228. -- ----------------------------
     
229. INSERT INTO `t_user_type` VALUES ('1', '菜鸟');
     
230. INSERT INTO `t_user_type` VALUES ('2', '高手');
     
231. INSERT INTO `t_user_type` VALUES ('3', '传说');
     
232. INSERT INTO `t_user_type` VALUES ('4', '普通');
     
233. <font face="Arial, Verdana, sans-serif"><span style="white-space: normal;"> </span></font>

复制代码

以上就是MySQL实现显示百分比显示和前百分之几的方法的详细内容，更多关于MySQL 百分比显示的资料请关注脚本之家其它相关文章！
                                                        
免责声明：如果侵犯了您的权益，请联系站长，我们会及时删除侵权内容，谢谢合作！