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...
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...
(1)When you enable table compression by specifying either COMPRESS or COMPRESS BASIC, you enable basic table compression. Oracle Database attempts to compress data during direct-path INSERT operations when it is productive to do so. The original import utility (imp) does not support direct-path ...
Oracle Database Administrator's Guide and CREATE TYPE for more information about creating objects ALTER TABLE and DROP TABLE for information on modifying and dropping tables Prerequisites To create a relational table in your own schema, you must have the CREATE TABLE system privilege. To create ...
Oracle创建表语句(Create table)语法详解及示例 http://blog.csdn.net/haiross/article/details/11772847/
> CREATE TABLE names(name STRING COLLATE UNICODE_CI); -- Create an external table connected to Oracle > CREATE TABLE IF NOT EXISTS ora_tab USING ORACLE OPTIONS ( url '<jdbc-url>', dbtable '<table-name>', user '<username>', password '<password>' ); > SELECT * FROM ora_ta...
obclient>CREATETABLEt1(c1INTPRIMARYKEY,c2INT)PARTITIONBYHASH(c1)PARTITIONS8;Query OK,0rowsaffected 创建一级分区为 Range 分区,二级分区为 Key 分区的表。 obclient>CREATETABLEt1(c1INT,c2INT,c3INT)PARTITIONBYRANGE(c1)SUBPARTITIONBYKEY(c2,c3)SUBPARTITIONS5(PARTITIONp0VALUESLESS THAN(0),PARTITIONp1VALU...
obclient> CREATE TABLE tbl8 (col1 INT, col2 INT, col3 INT,CONSTRAINT equal_check1 CHECK(col2 = col3 * 2) ENABLE VALIDATE); Query OK, 0 rows affected 为表ref_t2 指定外键,当 DELETE 操作影响与子表相匹配行的父表中键值时,执行 SET NULL 操作。 obclient> CREATE TABLE ref_t1(c1 INT...
Oracle 不支持将 Oracle 同义词用于 PolyBase。 包含数组的 MongoDB 集合的外部表 若要创建包含数组的 MongoDB 集合的外部表,应使用Azure Data Studio 的数据虚拟化扩展,基于 PolyBase ODBC Driver for MongoDB 检测到的架构生成 CREATE EXTERNAL TABLE 语句。 驱动程序会自动执行平展操作。 或者,可使用sp_data_sou...
This is because a unique index is created on column OBJECT_ID when you create the table. Column OBJECT_ID stores a system-generated object identifier. See Also: CREATE INDEX Oracle Database Administrator's Guide for more information about the privileges required to create tables using types ...