ALTERTABLE TMP_LXQ_1 SET INTERVAL (numtoyminterval(1,'year')); 对于INTERVAL分区表,新增的超过分区上限的数据会自动导致对应的INTERVAL分区被建立。 同样INTERVAL分区表可以方便的转化为RANGE分区表,只需要不输入INTERVAL的值即可: ALTER TABLETMP_LXQ_1SET INTERVAL (); 三、interval分区的特点 1.由range分区...
CREATE TABLE table_name ( ... ) PARTITION BY RANGE(column1) INTERVAL expr [STORE IN (tablespace1,[tablespace2,...])] ( PARTITION partition_name1 VALUES LESS THAN(literal | MAXVALUE) [TABLESPACE tablespace1], PARTITION partition_name2 VALUES LESS THAN(literal | MAXVALUE) [TABLESPACE tablesp...
This is true when using TO_DATE and DATE, as shown in the following examples: -- Example using TO_DATE ALTER SESSION SET nls_calendar='English Hijrah'; CREATE TABLE t20 (d DATE) PARTITION BY RANGE (d) (PARTITION p1 VALUES LESS THAN (TO_DATE (' 2014-12-31 23:59:59','SYYYY-MM-...
范围分区表是通过 create table 语句的 partition by range 子句来创建的,分区的范围通过 values less than 子句指定,其指定的是分区的上限(不包含),所有大于等于指定值的数据被分配至下一个分区,除了第一个分区,每个分区的下限即前一个分区的上限: create table members ( id number, name varchar2(32), creat...
3、Interval Partition也可以创建复合分区 Interval-range Interval-hash Interval-list 4、复合分区例子 1) Interval-list -- Create table --drop table ISMP.GWTRXS purge; create table ISMP.GWTRXS ( GWORDERS_ID VARCHAR2(22), TRXNUM VARCHAR2(128) not null, ...
CREATE TABLE T_RANGE_0 ( A INT, B INT, PRIMARY KEY (B) )PARTITION BY RANGE(A)( ... );CREATE TABLE "T_RANGE_0" ( "A" NUMBER, "B" NUMBER NOT NULL, PRIMARY KEY ("B", "A") )...
PARTITION BY HASH Hash分区是一种分区技术,其中Hash算法用于在不同分区(子表)之间均匀分配行。通常在无法进行范围分区时使用该技术,例如通过员工ID、产品ID等进行分区。DSC不支持PARTITION BY HASH和SUBPARTITION BY HASH,且会注释掉这些语句。 输入:HASH PARTITION CREATE TABLE dept (deptno NUMBER, deptname VARCH...
Interval partitioning provides the ability to automatically generate a new partition of a fixed interval or range when data to be inserted does not fit into existing partition ranges. Reference partitioning is used where a parent-child relationship can be defined between tables and the child table ...
Range: 1 – 65535 Database Service Name Enter a database service name (Service Name/SID). The client can connect to the Oracle database through the database service name. For details about how to query the database service name, see the prompt on the GUI. PDB Name Container database (...
在Oracle 12中,您可以使用MATCH_RECOGNIZE: SELECT * FROM table_name MATCH_RECOGNIZE( PARTITION BY userid ORDER BY date_time_stamp MEASURES FIRST(taskid) AS task...