A Practical Guide to Ubuntu Linux Ubuntu Linux 实战手册 183 7 The Shell 219 PART III Digging into Ubuntu Linux 249 8 Linux GUIs: X and GNOME 251 9 The Bourne Again Shell 275 10 Networking and the Internet 353 11 Programming the Bourne Again Shell 395 x
oracl 和db2 常用语法比较: 1、取前N条记录 Oracle:Select * from TableName where rownum <= N; DB2:Select * from TableName fetch first N rows only; 2、取得系统日期 Oracle:Select sysdate from dual; DB2:Select current timestamp from sysibm.sysdummy1; 3、空值转换 Oracle:Select