用mysql把书上代码操作了一遍，内容比较基础，实际上需要记得内容不是很多.这是一本sql的入门剧集，后面的存储过程，事务处理，游标，索引，触发器等基本等于没讲，只是了解了一下，要想深入需要补充其他知识，但是这部剧对新手很友好，学起来比较轻松
SELECT prod_name
FROM Products;
SELECT pro_names FROM Procucts;
SELECT
prod_name
FROM
Products;
SELECT prod_id,prod_name,prod_price
FROM Products;
SELECT *
FROM Products;
SELECT vend_id
FROM products;
SELECT DISTINCT vend_id
FROM products;#distinic 返回唯一值
SELECT prod_name
FROM products
LIMIT 5 OFFSET 5;
SELECT prod_name
FROM Products
ORDER BY prod_name;
SELECT prod_id,prod_price,prod_name
FROM products
ORDER BY prod_price,prod_name;
SELECT prod_id,prod_price,prod_name
FROM products
ORDER BY 2,3;
SELECT prod_id,prod_price,prod_name
FROM products
ORDER BY prod_price DESC;
SELECT prod_id,prod_price,prod_name
FROM products
ORDER BY prod_price DESC,prod_name;
SELECT prod_name,prod_price
FROM products
WHERE prod_price=3.49;
SELECT prod_name,prod_price
FROM products
WHERE prod_price<=10;
SELECT vend_id,prod_name
FROM products
WHERE vend_id <>"DLL01";
SELECT vend_id,prod_name
FROM products
WHERE vend_id!="DLL01";
SELECT prod_name,prod_price
FROM products
WHERE prod_price BETWEEN 5 AND 10;
SELECT prod_name
FROM products
WHERE prod_price IS NULL;
SELECT cust_name,cust_email
FROM customers#第一到第四节：检索，排序，过滤
SELECT prod_id,prod_price,prod_name
FROM products
WHERE vend_id="DLL01" AND prod_price<=4;
SELECT prod_name,prod_price,vend_id
FROM products
WHERE vend_id="DLL01" OR vend_id="BRS01"
ORDER BY prod_price
SELECT prod_name,prod_price
FROM products
WHERE (vend_id="DLL01"
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