继续插入数据会如何当表中的数据量不断增大，查询数据的速度就会变慢，应用程序的性能就会下降，这时就应该考虑对表进行分区。表进行分区后，逻辑上仍然是一张完整的表，只是将表中的数据在物理上存放到多个表空间（物理文件上），这样查询数据时，不至于每次都扫描整张表。
Oracle Partition - Range Composite (With Sub-partitions) Syntax For the range syntax, see range composite syntax. The subpartition list syntax is: subpartition_by_list Example Basis CREATE TABLE T_CNT_AGG_KPI_WEEK_TEST ( WEEK_CODE VARCHAR2(7 CHAR), CATEGORIE_CODE VARCHAR2(7 CHAR) ) PAR...
OraclePartitionByRange语法是一种将表数据分成多个分区的方法。该方法基于表的某个列,将数据分成多个分区,每个分区包含按范围划分的特定行数。以下是Oracle Partition By Range语法的详细说明: 1.创建分区表 CREATE TABLE table_name ( column1 datatype [ NULL | NOT NULL ], column2 datatype [ NULL | NOT ...
for interval range partitioning. SeeOracle Partition - Range Interval Partitioning Example For example, in a table of customer transactions called TRANS, you can range-partition it by: using the TRANS_DT (transaction date) column as thepartition key so that: a first partition holds records in wh...
partition:分区名称; values less than:后跟分区范围值(如果依赖列有多个,范围对应值也是多个,以逗号分隔开); tablespace_clause:分区的存储属性,例如所在表空间等属性(可为空),默认继承基表所有表空间的属性。 Range Partition Example SQL> edit 已写入 file afiedt.buf ...
INTERVAL分区是Oracle11g新增的特性,它是针对Range类型分区的一种功能拓展。对连续数据类型的Range分区,如果插入的新数据值与当前分区均不匹配,Interval-Partition特性可以实现自动的分区创建。 示例: createtable TMP_LXQ_1 ( proposalnovarchar2(22), startdatedate ...
through 10 are stored in partitionp1, and so on. Note that each partition is defined in order, from lowest to highest. This is a requirement of thePARTITION BY RANGEsyntax; you can think of it as being analogous to a series ofif ... elseif ...statements in C or Java in this ...
INTERNAL: Return if the value is in the partitions range. voidsetConnectionPool(java.lang.String connectionPool) PUBLIC: Return the connection pool to use for this partition. voidsetEndValue(java.lang.Comparable endValue) PUBLIC: Set the range end value. ...
INTERVAL分区是Oracle11g新增的特性,它是针对Range类型分区的一种功能拓展。对连续数据类型的Range分区,如果插入的新数据值与当前分区均不匹配,Interval-Partition特性可以实现自动的分区创建。 示例: createtable TMP_LXQ_1 ( proposalnovarchar2(22), startdatedate ...
Oracle Partition the data based on consecutive ranges of values of the Partition key. Each partition’s end point is specified using the following syntax: VALUES LESS THAN (value-list) Example CREATE TABLE EXP_RANGE (ID NUMBER(15) NOT NULL, ...