Bill Karwin âSQL Antipatterns: Avoiding the Pitfalls of Database Programmingâ ã®èªæ¸ã¡ã¢ã Jaywalking ç®ç ããå±æ§ã«ã¤ãã¦ãè¤æ°ã®å¤ãæãããã ã¢ã³ããã¿ã¼ã³ : ã«ã³ãåºåããªã¹ã ã«ã³ãåºåãã§è¤æ°ã®å¤ã 1 ã¤ã®åã«ç´ããã ä¾ã§ã¯ãç¹å®ã®è£½åã«ã¤ãã¦ã®æ å½è ãè¤æ°è¨å®ããã®ã«ã«ã³ãåºåãã§ãæ å½è ã®ã¢ã«ã¦ã³ãIDãè¨è¿°ãã¦ããã create table products ( product_id integer, product_name varchar(1000), acount_id varchar(100), -- comma separated list -- ... ); insert into products (product_id, product_name, accou
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