Mysql加入和订购

Question

我有3个表具有相同的列，但数据不同（存款，取款，转账）

  

创建表，如果不是EXISTS   withdrawals（id int（11）NOT   NULL auto_increment，user   varchar（12）默认为NULL，amount   double（12,2）默认为NULL，date   timestamp NULL默认值   CURRENT_TIMESTAMP，time   varchar（50）默认为NULL，type   varchar（50）默认为NULL，status   varchar（1）默认为'0'，notes PRIMARY KEY   （id））ENGINE = MyISAM DEFAULT   CHARSET = latin1 AUTO_INCREMENT = 1;

我想将所有3个表合并到1个表中，并按所有日期对它们进行排序，并仅在user ='$ user'

时显示一行

Example if table 1 has this data
id  user    amount  date        time    type            status          notes
2   vveer   142.00  2010-04-01 03:05:01 PayPal              2          deposit
3   test11  116.00  2010-04-01 10:33:23 PayPal              2          deposit

Example if table 2 has this data
id  user    amount  date        time    type            status          notes
3   vveer   142.00  2009-04-01 03:05:01 PayPal              2          withdraw
7   test11  112.00  2010-04-12 10:33:23 PayPal              2          withdraw

Example if table 3 has this data
id  user    amount  date        time    type            status          notes
5   test11  133.00  2010-03-01 10:33:23 PayPal              2          transfer
7   test11  123.00  2010-02-01 10:33:23 PayPal              2          transfer

I want to show all data for user test11 ordered by dates(is like putting all the dates together and ordering by 1 date column ) .
3   test11  112.00  2010-04-12 10:33:23 PayPal              2          withdraw
7   test11  116.00  2010-04-01 10:33:23 PayPal              2          deposit
5   test11  133.00  2010-03-01 10:33:23 PayPal              2          transfer
5   test11  123.00  2010-02-01 10:33:23 PayPal              2          transfer

Answer 1

如果我理解你的问题，这个案例就是UNION运算符的设计目的。有关详细信息，请参阅http://www.w3schools.com/sql/sql_union.asp。