摘要:
mysql查询优化方案 对查询进行优化,应尽量避免全表扫描,首先应考虑在 where 及 order by 涉及的列上建立索引 in ,not in会全表扫描 模糊查询也会全表扫描:select id from t where name like '%abc%' 并不是所有索引对查询都有效,SQL是 阅读全文
摘要:
## .gitignore for Grails 1.2 and 1.3 # .gitignore for maven target/ *.releaseBackup # web application files #/web-app/WEB-INF # IDE support files /.classpath /.launch /.project /.settings /*.launch /* 阅读全文