ak
发帖数: 512 | 1 question: how to create a column in one table which points to another table?
for example:
column(premises) in table data_rules has its type : rule_type,
rule_type is another table. (see the following two tables).
i saw these two table, but i do not know how create premises
and let it has type(rule_type which points to another table).
would you please write the command for me? thanks!
SQL> desc data_rules;
Name Null? Type
---------------------------------- |
|
