题目内容
(请给出正确答案)
[单选题]
有如下存储过程: DELIMITER // CREATE PROCEDURE CountProc1(IN s_gender VARCHAR(50),OUT n
A.CALL CountProc1(in "女",out @num);
B.SELECT CountProc1("女",@num);
C.DECLARE CountProc1("女",out @num);
D.CALL CountProc1("女",@num);
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