Create a procedure that should contain a cursor that holds the country 1D and the countnames ofthe country able. lt should provide users the facility to display the country itand the country names of the first nine records from the country table.
时间: 2023-07-02 17:14:58 浏览: 86
Sure, here's a sample procedure that uses a cursor to fetch the country ID and name from the `country` table and displays the first nine records:
```
CREATE PROCEDURE display_countries()
BEGIN
DECLARE done INT DEFAULT FALSE;
DECLARE country_id INT;
DECLARE country_name VARCHAR(50);
DECLARE cur CURSOR FOR SELECT country_id, country_name FROM country;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
OPEN cur;
FETCH cur INTO country_id, country_name;
SELECT CONCAT('Country ID: ', country_id, ', Country Name: ', country_name) AS country_info;
SET @count = 1;
WHILE @count < 9 AND NOT done DO
FETCH cur INTO country_id, country_name;
SELECT CONCAT('Country ID: ', country_id, ', Country Name: ', country_name) AS country_info;
SET @count = @count + 1;
END WHILE;
CLOSE cur;
END;
```
You can call this procedure to display the country ID and name of the first nine records from the `country` table by executing:
```
CALL display_countries();
```
Note that you can modify the number of records to display by changing the value of `@count` in the procedure.
阅读全文