发布于 2016-03-05 12:18:17 | 162 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Mysql教程，程序狗速度看过来！

Mysql关系型数据库管理系统

MySQL是一个开放源码的小型关联式数据库管理系统，开发者为瑞典MySQL AB公司。MySQL被广泛地应用在Internet上的中小型网站中。由于其体积小、速度快、总体拥有成本低，尤其是开放源码这一特点，许多中小型网站为了降低网站总体拥有成本而选择了MySQL作为网站数据库。

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最近我接触了一本php 与 mysql,老外写的一本书，书中有个tshirtshop网店代码，其中操作数据库的大多用的是mysql存储过程
一开始用phpMyAdmin来执行，后来出现一堆错误，后来去掉了begin,end之后可以正常执行，但要执行存储过程，在phpMyAdmn中不行，而在mysql命令行文本框中就可以。
接下来又遇到更难的问题，在存储过程中加入预处理语句，更不行了，在mysql命令行文本框下执行同样，下面的运行记录，给大家参考，能否有高手来帮助。

mysql> CREATE PROCEDURE catalog_get_products_in_category( 
-> IN inCategoryId INT, IN inShortProductDescriptionLength INT, 
-> IN inProductsPerPage INT, IN inStartItem INT) 
-> begin 
-> SELECT p.product_id, p.name,IF(LENGTH(p.description) <= inShortProductD 
escriptionLength, p.description, 
-> CONCAT(LEFT(p.description, inShortProductDescriptionLength),'...')) AS 
description, p.price, p.discounted_price, p.thumbnail 
-> FROM product p INNER JOIN product_category pc ON p.product_id = pc.pro 
duct_id 
-> WHERE pc.category_id = inCategoryId 
-> ORDER BY p.display DESC 
-> LIMIT inStartItem;inProductsPerPage; 
-> end$$ 
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that 
corresponds to your MySQL server version for the right syntax to use near 'inSta 
rtItem;inProductsPerPage; 
end' at line 10 

//原本的存储过程语句
EATE PROCEDURE catalog_get_products_in_category(
IN inCategoryId INT, IN inShortProductDescriptionLength INT,
IN inProductsPerPage INT, IN inStartItem INT)
BEGIN
PREPARE statement FROM
"SELECT p.product_id, p.name,IF(LENGTH(p.description) <= ?, p.description,
CONCAT(LEFT(p.description, ?),'...')) AS description, p.price, p.discounted_price, p.thumbnail
FROM product p INNER JOIN product_category pc ON p.product_id = pc.product_id
WHERE pc.category_id = ?
ORDER BY p.display DESC
LIMIT ?, ?";
SET @p1 = inShortProductDescriptionLength;
SET @p2 = inShortProductDescriptionLength;
SET @p3 = inCategoryId;
SET @p4 = inStartItem;
SET @p5 = inProductsPerPage;
EXECUTE statement USING @p1, @p2, @p3, @p4, @p5;
END$$

mysql> delimiter $$
mysql> CREATE PROCEDURE catalog_get_products_in_category(
-> IN inCategoryId INT, IN inShortProductDescriptionLength INT,
-> IN inProductsPerPage INT, IN inStartItem INT)
-> BEGIN
-> PREPARE statement FROM
-> "SELECT p.product_id, p.name,IF(LENGTH(p.description) <= ?, p.descript
ion,
"> CONCAT(LEFT(p.description, ?),'...')) AS description, p.price, p.disco
unted_price, p.thumbnail
"> FROM product p INNER JOIN product_category pc ON p.product_id = pc.pro
duct_id
"> WHERE pc.category_id = ?
"> ORDER BY p.display DESC
"> LIMIT ?, ?";
-> SET @p1 = inShortProductDescriptionLength;
-> SET @p2 = inShortProductDescriptionLength;
-> SET @p3 = inCategoryId;
-> SET @p4 = inStartItem;
-> SET @p5 = inProductsPerPage;
-> EXECUTE statement USING @p1, @p2, @p3, @p4, @p5;
-> END$$
ERROR 1314 (0A000): PREPARE is not allowed in stored procedures

上面有两个存储过程，一个不用预处理语句，一个用了预处理语句，
之后，向作者发过邮件，没有答复，又给mysql官方发过邮件，同样没答复。现今只能求助诸位高人。