Sec@ora10g>,alter,table,t_child2,add,constraint, FK_t_child2,foreign,key(parent_id),references,t_parent (parent_id),on,delete,,cascade; Sec@ora10g>,insert,into,t_child2,values(2,2); Sec@ora10g>commit; (1)setnulltype Sec@ora10g>,create,table,t_child3(child2_id,int,primary, ...
first_name varchar2(8), --表级约束constraint emp1_emp_id_pk primary key(employee_id), constraint emp1_fir_name_uk unique(first_name), --外键约束constraint emp1_dept_id_fk foreign key(dept_id)referencesdepartments(department_id) ON DELETE CASCADE ) 1. 2. 3. 4. 5. 6. 7. 8. 9....
If you can not remove the constraint, use this directive to set an arbitral date that will be used instead. You can also use -INFINITY if you don't want to use a fake date. INDEXES_SUFFIX Add the given value as suffix to indexes names. Useful if you have indexes with same name as...
Remove dump_schema_information and initialize_schema_migrations_table [#972] Remove fallback_string_to_date, fallback_string_to_time [#974, #975, #1112] Remove dependent option from add_foreign_key [#976] Remove specs testing Rails self.ignored_columns features [#987] Remove add_foreign_key...
Why do I receive the "ORA-02298: parent key not found" error message? You receive this error message if you do not obey the foreign key constraint. When you use the Migration Workbench, you should load the data for the parent table before the data for a referenced table in a foreign ...
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: ...
SQL> alter table bowie_kid add constraint bowie_kid_fk foreign key(dad_id) references bowie_dad(id); Table altered. We’re now going to create two indexes concurrently on the FK constraint on the DAD_ID column, a Bitmap Index and an invisible B-Tree Index as is now possible since Or...
Equipartitioning is a database partitioning feature that partitions master and detailed tables based on their foreign key constraint. This feature creates table partitions that group related master and detail rows in the same date range. This grouping ensures that no dangling references are created whe...
Error message907(Unique constraint violation) is improved to include column names and values. Thesb_ErrOcDupKeyerror msg is improved to contain the column name and value of the row causing a load or autorefresh failure. 1.29.3Bug fixes ...
CREATE GLOBAL TEMPORARY TABLE t1 (c1 integer, FOREIGN KEY (c1) REFERENCES source (id)); ERROR: attempt to create referential integrity constraint on global temporary table ALTER TABLE t2 ADD FOREIGN KEY (c1) REFERENCES source (id); ERROR: attempt to create referential integrity constraint on glo...