标签：info one 技术 blank -- htm https 图片 splay
SELECT product_name, regist_date FROM Product WHERE regist_date > ‘2009-04-28‘;
/* 下面是问题的SELECT语句 */ -- ① SELECT * FROM Product WHERE purchase_price = NULL; -- ② SELECT * FROM Product WHERE purchase_price <> NULL; -- ③ SELECT * FROM Product WHERE product_name > NULL;
-- SELECT语句① SELECT product_name, sale_price, purchase_price FROM Product WHERE sale_price >= purchase_price + 500; -- SELECT语句② SELECT product_name, sale_price, purchase_price FROM Product WHERE sale_price - 500 >= purchase_price;
SELECT product_name, product_type, sale_price * 0.9 - purchase_price AS profit FROM Product WHERE sale_price * 0.9 - purchase_price > 100 AND ( product_type = ‘办公用品‘ OR product_type = ‘厨房用具‘);
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参考资料：
https://www.cnblogs.com/MarlonKang/p/12222429.html
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标签：info one 技术 blank -- htm https 图片 splay
原文地址：https://www.cnblogs.com/MarlonKang/p/12222841.html
