dawei
原生jdbc方式：Statement.getGeneratedKeys()示例：Statement stmt = null;ResultSet rs = null;try {//// Create a Statement instance that we can use for// normal result sets assuming you have a// Connection conn to a MySQL database already// ava
新设计表时可以执行语句：`update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT 更新时间,修改表可执行语句：ALTER TABLE table_nameMODIFY COLUMN update_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON
BackgroundWe have a legacy system in our production environment that keeps track of when a user takes an action on Causes.com (joins a Cause, recruits a friend, etc). I say legacy, but I really mean a prematurely-optimized system that I’d
使用mysql的时候，用到int类型的蛮多，需要注意一下：1. 值的范围TypeStorageMinimum ValueMaximum Value(Bytes)(Signed/Unsigned)(Signed/Unsigned)TINYINT1-128127255SMALLINT2-327683276765535MEDIUMINT3-8388608838860716777215INT4-21474836482147483647
mybatis本身的说明：String SubstitutionBy default, using the #{} syntax will cause MyBatis to generate PreparedStatement properties and set the values safely against the PreparedStatement parameters (e.g. ?). While this is safer, faster and
divid=\cnblogs_post_body\class=\blogpost-body\MemcachedMemcached是一个高性能的分布式内存对象缓存系统，用于动态Web应用以减轻数据库负载。它通过在内存中缓存数据和对象来减
记录第一次创建时间，defaultfalsk中如下两个字段
先进行如下操作：fromflaskimportFlaskfromflask.ext.sqlalchemyimportSQLAlchemyapp=Flask(__name__)
正在加载中... 
已加载所有文章
已经没有更多文章了