Question

我试图创建一个存储过程但是得到一个错误，任何人都可以告诉我的代码中有什么错误

_id

Answer 1

你可以试试这个，交配：

DELIMITER //
DROP PROCEDURE IF EXISTS new_pro //
CREATE PROCEDURE new_pro (
    IN f_name VARCHAR(100),
    IN l_name VARCHAR(100)
)
BEGIN
    CASE
        WHEN (f_name IS NOT NULL OR (f_name != '')) THEN
            SELECT * FROM tbl_contact_master WHERE first_name = f_name;
        WHEN (l_name IS NOT NULL OR (l_name != '')) THEN
            SELECT * FROM tbl_contact_master WHERE last_name = l_name;
        WHEN (
            (f_name IS NOT NULL OR (f_name != ''))
            AND (l_name IS NOT NULL OR (l_name != ''))
        ) THEN
            SELECT * FROM tbl_contact_master WHERE first_name = f_name AND last_name = l_name;  
    END CASE;
END //
DELIMITER ;

Answer 2

首先添加分隔符并结束。像这样

DELIMITER //
    CREATE PROCEDURE new_pro
    (IN f_name VARCHAR(100),IN l_name VARCHAR(100))
    BEGIN
    IF (f_name != '')
     BEGIN
         SELECT * FROM tbl_contact_master
         WHERE first_name = f_name
     END
    ELSE IF (l_name != '')
     BEGIN
         SELECT * FROM tbl_contact_master
         WHERE last_name = l_name
     END
    ELSE IF (f_name != '' && l_name != '')
       BEGIN
         SELECT * FROM tbl_contact_master
         WHERE first_name = f_name AND last_name = l_name
       END
    END
    DELIMITER ;

Answer 3

以下内容应该有效：

DELIMITER //
CREATE PROCEDURE new_pro
(IN f_name VARCHAR(100),IN l_name VARCHAR(100))
IF f_name != '' AND l_name != '' THEN
     SELECT * FROM tbl_contact_master
     WHERE first_name = f_name AND last_name = l_name;
ELSEIF f_name != '' THEN
     SELECT * FROM tbl_contact_master
     WHERE first_name = f_name;
ELSEIF l_name != '' THEN
     SELECT * FROM tbl_contact_master
     WHERE last_name = l_name;
END IF
//
DELIMITER ;

您错过了THEN语句中的IF个关键字。 SELECT正文中的IF语句需要以;结尾。您需要先使用DELIMITER语句，以便那些内部;不会结束此过程。

您不需要BEGIN和END，因为IF是一个声明。

填写f_name和l_name的测试需要先行。否则，它只会执行f_name查询。

尝试在MySql中创建存储过程但收到错误

3 个答案: