Most mysql select null related news are at:
MySQL for Big Data 2 Jun 2011 | 05:45 am
An excerpt from article on mysql for big data published in Dow Jones Venture Wire by Scott Denne. There is one possible solution to the problem that doesn't include companies having to buy new softwar...
Presenting "Real-Life Use Cases From Data Administration Hell" at LAMySQL 8 Feb 2011 | 08:12 am
If you're in the Los Angeles area on Feb 15, come hear my talk at LAMySQL inspired by learnings from real-life experiences. In addition to hearing a very unique and interesting talk, you can win an Ap...
More mysql select null related news:
MySQL NULL gotcha; or, yes, Virginia, types do matter ender.com 29 Apr 2009 | 05:15 am
If you spend a lot of time dealing with languages that are loosely typed and have scalars running wild, then like me, you may be prone to doing something like this: mysql> select NOW(); select GRE...
MySQL Select Last n Records Without Changing The Order enghiong.com 16 Apr 2012 | 11:42 pm
Let’s say I am going to select the last 10 records of a table. The main consideration would be using the query: SELECT recordId FROM myTable ORDER BY recordId DESC LIMIT 10 The above query woul...
MySQL Bar Chart from the Command Line onlinemarketer.com 5 May 2009 | 09:57 pm
MySQL Command Line Bar Chart I just ran accross this really cool method of generating a bar chart from the mysql command line using the mysql repeat command: mysql> select date_format( create_...
MYSQL的profile使用 9enjoy.com 24 Apr 2012 | 11:08 am
MYSQL的profiling功能要在Mysql版本5.0.37以上才能使用。 开启profiling: set profiling=1; 查看是否设置生效： select @@profiling; 默认是0，设置成功是1 运行SQL语句： mysql> select * FROM hx_line WHERE id = '1455023'; 查看profiles mysql> ...
Limited SELECT count(*) mysqldiary.com 14 May 2010 | 05:52 am
A SELECT statement with COUNT returns the number of rows retrieved by the SELECT statement (see mysql select count). For performance reasons, the desired result is to limit that count. Including a LIM...
MYSQL的profile使用 9enjoy.com 24 Apr 2012 | 07:08 am
MYSQL的profiling功能要在Mysql版本5.0.37以上才能使用。 开启profiling: set profiling=1; 查看是否设置生效： select @@profiling; 默认是0，设置成功是1 运行SQL语句： mysql> select * FROM hx_line WHERE id = '1455023'; 查看profiles mysql> ...
mysql处理字符串 liangfen1224.blog.163.com 20 Jun 2012 | 10:11 am
MySQL 字符串截取函数：left(), right(), substring(), substring_index()。还有 mid(), substr()。其中，mid(), substr() 等价于 substring() 函数，substring() 的功能非常强大和灵活。 1. 字符串截取：left(str, length) mysql> select left('sqlstudy.c...
MySQL字符串连接 zhaohe162.blog.163.com 11 Jul 2012 | 06:40 am
1、concat ()函数 1.1 MySQL的concat函数可以连接一个或者多个字符串,如 mysql> select concat('10'); +--------------+ | concat('10') | +--------------+ | 10 | +----------...
方正教务系统sql注射 moonhack.org 30 Jul 2012 | 02:49 pm
1. 教室查询处有sql注射，如图 1 union select NULL,owner from all_tables 爆出数据库 2. 找回密码存在sql注射 验证方式为本地javascript验证，服务端未做验证，可爆出第一个用户（管理员密码） ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~...
MySQL Select Last n Records Without Changing The Order enghiong.com 16 Apr 2012 | 07:42 pm
Let's say I am going to select the last 10 records of a table. The main consideration would be using the query: SELECT recordId FROM myTable ORDER BY recordId DESC LIMIT 10 The above query would selec...
