DDL(Data Definition Language)DML(Data Manipulation Language)DCL(Data Control Language) ** DB 구축 설계 **[root@localhost ~] sysctl -w vm.swappiness=40## 또는 vi /etc/sysconf.conf 에서 vm.swappiness=40 이라고 선언해도 됌[root@localhost ~] cat /proc/meminfoMemTotal: 1814292 kBMemFree: 762228 kBMemAvailable: 898452 kBBuffers: 2708 kBCached: 248296 kBSwapCached: 0 kBActive: 734484 kB....[root@localhost ~] cat /et..