oracle中格式化SYS_GUID()成為標準格式 用法

Oracle裡面用RAW(16)儲存SYS_GUID()的結果，不過位元組順序(byte order)和標準的GUID不同。如下

標準GUID： 265B113F-0E9D-F44D-A9D4-18BC4D3E836C
RAW(16) ： 3F115B26 9D0E 4DF4 A9D4 18BC4D3E836C （實際沒有空格，這裡是為了顯示方便）

為了方便查看，可以用Regex進行簡單的轉換。

代碼如下

複製代碼

create table t(x raw(16)); insert into t(x)  select sys_guid() from dual connect by rownum <=5; commit; select x,        regexp_replace(x,                       '(.{2})(.{2})(.{2})(.{2})(.{2})(.{2})(.{2})(.{2})(.{4})',                       '4321-65-87-9-') as fmt_x   from t;   X                                                                 FMT_X --------------------------------                      -------------------------------------------------------------------------------- B5D8E10BB3BCC595E040007F01000F49     0BE1D8B5-BCB3-95C5-E040-007F01000F49 B5D8E10BB3BDC595E040007F01000F49     0BE1D8B5-BDB3-95C5-E040-007F01000F49 B5D8E10BB3BEC595E040007F01000F49     0BE1D8B5-BEB3-95C5-E040-007F01000F49 B5D8E10BB3BFC595E040007F01000F49     0BE1D8B5-BFB3-95C5-E040-007F01000F49 B5D8E10BB3C0C595E040007F01000F49     0BE1D8B5-C0B3-95C5-E040-007F01000F49