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9.数据处理函数
文本处理：Upper 大写
mysql> select uid,name,msg, Upper(name) as UpperName from pw_luck; +-----+-----------+------+-----------+ | uid | name | msg | UpperName | +-----+-----------+------+-----------+ | 0 | Wilson | 100 | WILSON | | 1 | zhangsan | 100 | ZHANGSAN | | 2 | lisi | 1001 | LISI | | 3 | wang5 | 1001 | WANG5 | | 7 | zhangsan7 | 1000 | ZHANGSAN7 | | 8 | zhangsan8 | 1000 | ZHANGSAN8 | | 9 | zhangsan9 | 1000 | ZHANGSAN9 | | 10 | wang5 | 1000 | WANG5 | | 11 | wang5% | 2000 | WANG5% | | 12 | WANG5 | 1000 | WANG5 | +-----+-----------+------+-----------+ 10 rows in set (0.02 sec)
文本处理：Soundex匹配所有发音类似的项
mysql> select uid,name,msg, Upper(name) from pw_luck where Soundex(name)=Soundex(‘wangwu‘); +-----+--------+------+-------------+ | uid | name | msg | Upper(name) | +-----+--------+------+-------------+ | 3 | wang5 | 1001 | WANG5 | | 10 | wang5 | 1000 | WANG5 | | 11 | wang5% | 2000 | WANG5% | | 12 | WANG5 | 1000 | WANG5 | +-----+--------+------+-------------+ 4 rows in set (0.03 sec)
日期和时间处理函数
Data（） 2012-12-12
Year（） 2012
Mounth（） 2
数值处理： Abs绝对值 Cos余弦 Exp指数 Mod余数 Sqrt平方根
mysql> select name,msg,Sqrt(msg) from pw_luck; +-----------+------+--------------------+ | name | msg | Sqrt(msg) | +-----------+------+--------------------+ | Wilson | 100 | 10 | | zhangsan | 100 | 10 | | lisi | 1001 | 31.63858403911275 | | wang5 | 1001 | 31.63858403911275 | | zhangsan7 | 1000 | 31.622776601683793 | | zhangsan8 | 1000 | 31.622776601683793 | | zhangsan9 | 1000 | 31.622776601683793 | | wang5 | 1000 | 31.622776601683793 | | wang5% | 2000 | 44.721359549995796 | | WANG5 | 1000 | 31.622776601683793 | +-----------+------+--------------------+ 10 rows in set (0.02 sec)
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原文地址：http://www.cnblogs.com/wjw334/p/4288080.html
