I don't get what is wrong with this script
BEGIN
DECLARE crs INT DEFAULT 0;
WHILE crs < 10 DO
INSERT INTO `continent`(`name`) VALUES ('cont'+crs)
SET crs = crs + 1;
END WHILE;
END;
I want it to insert 10 values into the table continent but there is an error at the second line.
declare variable in MySQL with @ and assign with :=
SET @crs = 0; // declaration
--here your query
@crs := @crs+1 // assignment
References
BEGIN DECLARE crs INT; SET @crs = 0; WHILE crs < 10 DO INSERT INTO `continent`(`name`) VALUES ('cont'+@crs) SET @crs = crs + 1; END WHILE; END; it's not working this way either
MySQL does not support the execution of anonymous blocks of stored procedure code.
You need to create a stored procedure including that code and then invoke it.
Also, you were missing the semi-colon at the end of your insert statements. I fixed that. You also probably want to use concat() instead of + to generate the names, but I'll leave that change to you.
Create the procedure:
DELIMITER $$
DROP PROCEDURE IF EXISTS insert_ten_rows $$
CREATE PROCEDURE insert_ten_rows ()
BEGIN
DECLARE crs INT DEFAULT 0;
WHILE crs < 10 DO
INSERT INTO `continent`(`name`) VALUES ('cont'+crs);
SET crs = crs + 1;
END WHILE;
END $$
DELIMITER ;
Invoke the procedure:
CALL insert_ten_rows();
