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中年人之碎碎念

Http:/ www.itpub.net/thread-1390472-1-2.html. ID NO SEL1 SEL2 SEL3. 1 001 A A A. 2 001 A B C. 3 001 B B C. 4 001 C B C. 5 001 B B C. 6 001 B C C. 7 002 A A B. 8 002 B A B. 9 002 C A B. 10 002 C B B. 11 002 C B B. 12 002 C B C. 1、统计每个NO号（如001）的SEL1，SEL2，SEL3中各自包含A的个数，B的个数，C的个数；. 2、统计每个NO号（如001）的SEL1，SEL2，SEL3中A、B、C分别占总数的比例。 CREATE TABLE x0221 (. Id INT AUTO INCREMENT PRIMARY KEY,. No CHAR(3) NOT NULL,. Sel1 CHAR(1) NOT NULL,. Sel2 CHAR(1) NOT NULL,. Sel3 CHAR(1) NOT NULL);. 001", "A", "A", "A"),. 001 2 3 1.

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中年人之碎碎念 | postgresql8bunko.blogspot.com Reviews

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Http:/ www.itpub.net/thread-1390472-1-2.html. ID NO SEL1 SEL2 SEL3. 1 001 A A A. 2 001 A B C. 3 001 B B C. 4 001 C B C. 5 001 B B C. 6 001 B C C. 7 002 A A B. 8 002 B A B. 9 002 C A B. 10 002 C B B. 11 002 C B B. 12 002 C B C. 1、统计每个NO号（如001）的SEL1，SEL2，SEL3中各自包含A的个数，B的个数，C的个数；. 2、统计每个NO号（如001）的SEL1，SEL2，SEL3中A、B、C分别占总数的比例。 CREATE TABLE x0221 (. Id INT AUTO INCREMENT PRIMARY KEY,. No CHAR(3) NOT NULL,. Sel1 CHAR(1) NOT NULL,. Sel2 CHAR(1) NOT NULL,. Sel3 CHAR(1) NOT NULL);. 001, A, A, A),. 001 2 3 1.

<META> KEYWORDS

1 中年人之碎碎念

2 mysql的資料分組統計

3 在itpub看到有人問mysql的資料分組統計

4 表数据分组统计，sql的写法请教？

5 有表格式如下：

6 想统计出如下结果：

7 我的解法

8 先做sel的abc總數計算

9 這是很標準的作法利用case

10 那要算比例呢

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中年人之碎碎念,mysql的資料分組統計,在itpub看到有人問mysql的資料分組統計,表数据分组统计，sql的写法请教？,有表格式如下：,想统计出如下结果：,我的解法,先做sel的abc總數計算,這是很標準的作法利用case,那要算比例呢,大家都會用count 1 來算總數但是要把它用一道sql呢,其實我們可以用,group by no,善用cross join 讓總數的值都可以在每一個結果裡面引用,張貼者：,vincent chang,沒有留言,標籤： mysql,還是藍色小鋪的同樣的問題

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中年人之碎碎念 | postgresql8bunko.blogspot.com Reviews

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Http:/ www.itpub.net/thread-1390472-1-2.html. ID NO SEL1 SEL2 SEL3. 1 001 A A A. 2 001 A B C. 3 001 B B C. 4 001 C B C. 5 001 B B C. 6 001 B C C. 7 002 A A B. 8 002 B A B. 9 002 C A B. 10 002 C B B. 11 002 C B B. 12 002 C B C. 1、统计每个NO号（如001）的SEL1，SEL2，SEL3中各自包含A的个数，B的个数，C的个数；. 2、统计每个NO号（如001）的SEL1，SEL2，SEL3中A、B、C分别占总数的比例。 CREATE TABLE x0221 (. Id INT AUTO INCREMENT PRIMARY KEY,. No CHAR(3) NOT NULL,. Sel1 CHAR(1) NOT NULL,. Sel2 CHAR(1) NOT NULL,. Sel3 CHAR(1) NOT NULL);. 001", "A", "A", "A"),. 001 2 3 1.

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中年人之碎碎念: 七月 2010

http://postgresql8bunko.blogspot.com/2010_07_01_archive.html

此一方式是較不好的,無法利用日期函數;我們就能利用之前的chi2jul()來將原本的資料改為西洋年格式存放.在前面已經介紹. 此一情形在系統中實務應用上多半是以西洋年日期格式來作判斷,展現時轉換為西洋年與民國年同時,或以民國年方式展現,. 例如介面與報表等.而介面與報表之程式較多,進行系統升級時,若有漏網之魚就會造成後續運作上的困擾;或是運用一些報表. 系統時,增加運算功能會影響報表產生的速度.若我們能在MySQL直接產生,介面與報表系統均向MySQL存取就比較單純與且效率. 之前有一個測試的table: julchi , 我們根據他來產生一個view. Mysql select * from julchi;. 9 rows in set (0.10 sec). 可以觀察到此表已經先包含一個未使用 jul2chi()配合update轉換為民國日期的一筆紀錄. - - -. Mysql CREATE VIEW v julchi(julian, chidate1, chidate2) AS. SELECT julian, jul2chi(julian,1), jul2chi(julian,2). 就會在民國...

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中年人之碎碎念: 十一月 2010

http://postgresql8bunko.blogspot.com/2010_11_01_archive.html

Here = = http:/ files.andreineculau.com/projects/pidgin/omega.contacts.msn.com.txt. 將 txt 的副檔名拿掉, 存成 omega.contacts.msn.com 即可. 然後蓋掉原本在 /.purple/certificates/x509/tls peers 目錄下的 omega.contacts.msn.com 檔案. 訂閱：文章 (Atom). Awesome Inc.範本. 由 Blogger.

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中年人之碎碎念: 十月 2010

http://postgresql8bunko.blogspot.com/2010_10_01_archive.html

Http:/ www.blueshop.com.tw/board/FUM20041006152746MYF/BRD201010051423497Z5.html. CREATE TABLE `blue1` (. Data1` smallint(6) NOT NULL,. ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1 general ci;. CREATE TABLE `blue2` (. Q1` smallint(6) NOT NULL,. Q2` smallint(6) NOT NULL,. Q3` smallint(6) NOT NULL,. KEY `fk1` (`q1`),. KEY `fk2` (`q2`),. KEY `fk3` (`q3`),. CONSTRAINT `fk1` FOREIGN KEY (`q1`) REFERENCES `blue1` (`data1`),. CONSTRAINT `fk2` FOREIGN KEY (`q2`) REFERENCES `blue1` (`data1`),.

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中年人之碎碎念: 六月 2010

http://postgresql8bunko.blogspot.com/2010_06_01_archive.html

Id int auto increment primary key,. DROP FUNCTION IF EXISTS `mysample`.`chi2jul`$. CREATE FUNCTION `mysample`.`chi2jul` (olddate char(9) RETURNS date. Declare str len int;. Declare cut len int;. Declare old year int;. Declare new year int;. Declare new date str char(10);. Declare new date date;. Set str len = length(olddate);. If str len = 8 then. Set cut len = 2;. Set cut len = 3;. Set old year = convert(left(olddate, cut len),unsigned integer);. Set new year = old year 1911;. Return new date;. CREATE F...

5

中年人之碎碎念: MySQL Database Quota Control

http://postgresql8bunko.blogspot.com/2010/09/mysql-database-quota-control.html

MySQL Database Quota Control. Http:/ www.filesonic.com/file/17520903/mysqlquotabunko.rar. 訂閱：張貼留言 (Atom). Powerful tool for MySQL stored procedure developer. MySQL Database Quota Control. Awesome Inc.範本. 由 Blogger.

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postgresql8bunko.blogspot.com

中年人之碎碎念

Http:/ www.itpub.net/thread-1390472-1-2.html. ID NO SEL1 SEL2 SEL3. 1 001 A A A. 2 001 A B C. 3 001 B B C. 4 001 C B C. 5 001 B B C. 6 001 B C C. 7 002 A A B. 8 002 B A B. 9 002 C A B. 10 002 C B B. 11 002 C B B. 12 002 C B C. 1、统计每个NO号（如001）的SEL1，SEL2，SEL3中各自包含A的个数，B的个数，C的个数；. 2、统计每个NO号（如001）的SEL1，SEL2，SEL3中A、B、C分别占总数的比例。 CREATE TABLE x0221 (. Id INT AUTO INCREMENT PRIMARY KEY,. No CHAR(3) NOT NULL,. Sel1 CHAR(1) NOT NULL,. Sel2 CHAR(1) NOT NULL,. Sel3 CHAR(1) NOT NULL);. 001", "A", "A", "A"),. 001 2 3 1.

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