存储过程代码：
BEGIN
IF sex_id =0 THEN
SELECT COUNT(*) FROM mybatis.p_user WHERE p_user.sex='女' INTO sex_count;
ELSE
SELECT COUNT(*) FROM mybatis.p_user WHERE p_user.sex='男' INTO sex_count;
END IF; END
条件：
IN `sex_id` int,OUT `sex_count` int
执行：
SET @sex_count=0;
CALL mybatis.user_count(1,@sex_count);
SELECT @sex_count;
//可设置别名 SELECT @sex_count count;
结果：