Oracle Constraint Types Constraint Name Describle PRIMARY KEY 主键约束,一张表中即可以有主键也可以没有;如果有,有且只能有一个PRIMARY KEY. FOREIGN KEY 外键约束 NOT NULL 非空约束 UNIQUE 唯一约束.主键约束,从约束本身来讲就相当于(NOT NULL) + (UNIQUE) CHECK 检查约束 分类: Oracle DBA 标签: ORACLE...
表(视图)的属性(列)信息查看sql如下(以视图user_coll_types举例): select lower(column_name) column_name,nullable,decode(data_type,'VARCHAR2',data_type||'('||char_length||')',data_type) data_type from dba_tab_columns where lower(table_name)='user_coll_types' order by column_id; --》...
EXCLUDE Exclude specific objecttypes, e.g. EXCLUDE=TABLE:EMP. IMPDP导入时忽略索引可以使用类似如下参数: EXCLUDE=CONSTRAINTEXCLUDE=INDEX 如果导入时遇到如下错误,就需要调整REMAP_SCHEMA参数: ORA-39146: schema "SMS_MT" does not exist 遇到如下错误,那就需要制定REMAP_TABLESPACE参数: ORA-00959: tablespace '...
In most places in the Oracle documentation, the two terms are used interchangeably, with the notable exception of the foreign key constraint, which is discussed later in this chapter. Four different types of index structures, which are described in the following sections, are used in Oracle: ...
DEMS_REDEFINITION.CONS_CONSTRAINT当依赖对象类型是约束时 DEMS_REDEFINITION.CONS_TRIGGER当依赖对象是触发器时 DEMS_REDEFINITION.CONS_MVLOG当依赖对象是物化视图日志时 如果copy_table_dependent_object 过程复制依赖对象失败,并且需要手动干预,那么还可以使用 REGISTER_DEPENDENT_OBJECT 过程。
CONSTRAINT_TYPE : U --- PL/SQL procedure successfully completed. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. CTAS创建表, CREATE TABLE t1_1 AS SELECT * FROM t1; 1. 可以看到,新的表只存在这个非空约束,主键、唯一约束、外键约束这几个,都没带过来, SQL> exec ...
Examples of constraint types include primary key constraints, foreign key constraints, and check constraints. Specified by: getConstraintType in class Constraint Returns: a string value indicating the type of constraint. getIndexID public DBObjectID getIndexID() Get the Index...
r_constraint_schema name r_constraint_name name 被引用约束的名字 delete_rule text 外键约束的级联删除规则 is_deferrable boolean 表示约束是 DEFERRABLE 还是 NOT DEFERRABLE deferred boolean 表示约束是 DEFERRED 还是 IMMEDIATE 3.8.3.12 dba_indexes DBA_INDEXES描述了数据库中的所有索引。要收集此视图的统计信...
Gets the IDs of the columns referenced by this Constraint. setColumnIDs public void setColumnIDs(DBObjectID[] ids) Sets the IDs of the columns referenced by this Constraint. isConstrained public static boolean isConstrained(Column col, java.lang.String... constraintTypes) Tests whether the gi...
Creating Constraint: PK_TBUSEROPERATEINFO Creating Constraint: PK_TBUSER Creating Constraint: PK_DTV Creating Constraint: PK_TBTAG Creating Constraint: PK_TBROLES Creating Constraint: PK_TBPROJECT Creating Constraint: PK_TBMENU Creating Constraint: PK_TBLOGININFO ...