Oracle多鍵值分區測試
分區可以按照兩個字段分區，先比較第一個列，如果滿足，則忽略第二列，如果第一個不滿足，則需要比較第二個列。這種分區的方式有點難以讓人理解，建議不要使用。
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL> create table test (
year number(4),
month number(4),
day number(4))
partition by range (year,month)
(partition p1 values less than (2014,1),
partition p2 values less than (2014,6),
partition p3 values less than (2014,10),
partition p4 values less than (2014,12),
partition p_max values less than (MAXVALUE,0));
SQL> insert into test values(2013,12,12);
SQL> insert into test values(2014,1,17);
SQL> insert into test values(2014,7,17);
SQL> insert into test values(2014,11,1);
SQL> commit;
SQL> select * from test partition(p1);
YEAR MONTH DAY
---------- ---------- ----------
2013 12 12
SQL> select * from test partition(p2);
YEAR MONTH DAY
---------- ---------- ----------
2014 1 17
SQL> select * from test partition(p3);
YEAR MONTH DAY
---------- ---------- ----------
2014 7 17
SQL> select * from test partition(p4);
YEAR MONTH DAY
---------- ---------- ----------
2014 11 1
