EPTNO NUMBER(2) CONSTRAINT PK_DEPT PRIMARY KEY, DNAME VARCHAR2(14), LOC VARCHAR2(13)) ; CREATE TABLE region( ID number(2) NOT NULL PRIMARY KEY, postcode number(6) default '0' NOT NULL, areaname varchar2(30) default ' ' NOT NULL); 4. 创建表时的命名规则和注意事项 1)表名和字段...
CREATE TABLE DEPT( EPTNO NUMBER(2) CONSTRAINT PK_DEPT PRIMARY KEY, DNAME VARCHAR2(14), LOC VARCHAR2(13)) ; CREATE TABLE region( ID number(2) NOT NULL PRIMARY KEY, postcode number(6) default '0' NOT NULL, areaname varchar2(30) default ' ' NOT NULL); 4. 创建表时的命名规则和注意...
TABLE_MODE可选项,用于指定合并触发阈值与合并策略,即控制数据转储后的合并行为。取值的详细介绍可参见下文table_mode_value。 table_mode_value 说明 在以下列出的TABLE_MODE模式中,除了NORMAL模式之外,所有模式都代表QUEUING表。这种QUEUING表是最基本的表类型,并且随后列出的几种模式(除了 NORMAL 模式)代表了使用更加...
<table_option> ::= { [ DATA_COMPRESSION = { NONE | ROW | PAGE } [ ON PARTITIONS ( { <partition_number_expression> | <range> } [ ,... n ] ) ] ] [ XML_COMPRESSION = { ON | OFF } [ ON PARTITIONS ( { <partition_number_expression> | <range> } [ ,... n ] ) ] ] [...
<table_option> ::= { [ DATA_COMPRESSION = { NONE | ROW | PAGE } [ ON PARTITIONS ( { <partition_number_expression> | <range> } [ ,... n ] ) ] ] [ XML_COMPRESSION = { ON | OFF } [ ON PARTITIONS ( { <partition_number_expression> | <range> } [ ,... n ] ) ] ] [...
<table_option> ::= { [ DATA_COMPRESSION = { NONE | ROW | PAGE } [ ON PARTITIONS ( { <partition_number_expression> | <range> } [ ,... n ] ) ] ] [ XML_COMPRESSION = { ON | OFF } [ ON PARTITIONS ( { <partition_number_expression> | <range> } [ ,... n ] ) ] ] [...
以下示例创建一个名为myTable的新表,并在date列上进行分区。 通过使用边界值的RANGE RIGHT和日期,它会在每个分区中放置一个月的数据。 SQL CREATETABLEmyTable ( l_orderkeybigint, l_partkeybigint, l_suppkeybigint, l_linenumberbigint, l_quantitydecimal(15,2), l_extendedpricedecimal(15,2), l_di...
<table_option> ::= { [ DATA_COMPRESSION = { NONE | ROW | PAGE } [ ON PARTITIONS ( { <partition_number_expression> | <range> } [ ,... n ] ) ] ] [ XML_COMPRESSION = { ON | OFF } [ ON PARTITIONS ( { <partition_number_expression> | <range> } [ ,... n ] ) ] ] [...
CREATE TABLE mytest ( TestId INT NOT NULL, CREATE_DATE DATE DEFAULT OBJECTSCRIPT '+$HOROLOG' NOT NULL, LOGNUM NUMBER(12,0) DEFAULT OBJECTSCRIPT '$INCREMENT(^LogNumber)' ) ON UPDATE ON UPDATE子句使字段的计算值为%%UPDATE。这是定义字段的快捷语法,每当表中的行被更新时,该字段总是被计算。此...
<table_option> ::= { [ DATA_COMPRESSION = { NONE | ROW | PAGE } [ ON PARTITIONS ( { <partition_number_expression> | <range> } [ ,... n ] ) ] ] [ XML_COMPRESSION = { ON | OFF } [ ON PARTITIONS ( { <partition_number_expression> | <range> } [ ,... n ] ) ] ] [...