Creating a table with max number of rows (ORACLE)

问题

Is there any way to limit the maximum number of rows when I create a table in Oracle?

回答1:

If the table has a numeric key, you could add a check constraint that states that the key does not exceed a specific value:

ALTER TABLE turnip
ADD CONSTRAINT check_turnip_id
CHECK (turnip_id <= 50)
/

回答2:

You could create a statement trigger "BEFORE INSERT" and check there the nubmer of rows.

CREATE OR REPLACE TRIGGER BI_MY_TABLE
    BEFORE INSERT ON MY_TABLE
DECLARE
    CountRows NUMBER;
BEGIN
    SELECT COUNT(*)
    INTO CountRows
    FROM MY_TABLE;

    IF CountRows > 100 THEN
        RAISE_APPLICATION_ERROR(-20001, 'Only 100 records are allowed');    
    END IF;
END;
/

However, this trigger does not work properly in a multi-user environment.

来源：https://stackoverflow.com/questions/21047903/creating-a-table-with-max-number-of-rows-oracle