在MySQL中，我有一個(gè)帶有For循環(huán)的存儲(chǔ)過程：DELIMITER $$ CREATE PROCEDURE ABC() BEGIN DECLARE a INT Default 0 ; simple_loop: LOOP SET a=a+1; select a; IF a=5 THEN LEAVE simple_loop; END IF; END LOOP simple_loop;END $$它總是打印1。MySQL for循環(huán)的正確語法是什么？
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TA貢獻(xiàn)1852條經(jīng)驗(yàn) 獲得超1個(gè)贊
drop table if exists foo;
create table foo
(
id int unsigned not null auto_increment primary key,
val smallint unsigned not null default 0
)
engine=innodb;
drop procedure if exists load_foo_test_data;
delimiter #
create procedure load_foo_test_data()
begin
declare v_max int unsigned default 1000;
declare v_counter int unsigned default 0;
truncate table foo;
start transaction;
while v_counter < v_max do
insert into foo (val) values ( floor(0 + (rand() * 65535)) );
set v_counter=v_counter+1;
end while;
commit;
end #
delimiter ;
call load_foo_test_data();
select * from foo order by id;
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