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http://shop.oreilly.com/product/9780596528416.do
具体的章节链接https://books.google.com/books?id=Q9SnY-8_iasC&pg=PA16&lpg=PA16&dq=Now+use+dump+in+a+simple+query+that+will+end+up+selecting+all+the+doctors+because+the+function+always+returns+true&source=bl&ots=IpUtNYn0d1&sig=W0-uCKgaXBh-5rX0QJz0BXLg5l8&hl=zh-CN&sa=X&ei=s3abVYGBL4bkUri_g5AL&ved=0CCAQ6AEwAA#v=onepage&q=Now%20use%20dump%20in%20a%20simple%20query%20that%20will%20end%20up%20selecting%20all%20the%20doctors%20because%20the%20function%20always%20returns%20true&f=false
准确的链接https://books.google.com/books?id=Q9SnY-8_iasC&printsec=frontcover&hl=zh-CN#v=onepage&q&f=false
可以使用google books downloader进行下载
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原文地址：http://www.cnblogs.com/chucklu/p/4627133.html
