{"author_url":"https://blog.hatena.ne.jp/kiririmode/","provider_name":"Hatena Blog","width":"100%","title":"Chapter 6: Working with Sets","image_url":null,"blog_title":"\u7406\u7cfb\u5b66\u751f\u65e5\u8a18","categories":["study"],"version":"1.0","published":"2008-08-16 00:00:01","author_name":"kiririmode","blog_url":"https://kiririmode.hatenablog.jp/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkiririmode.hatenablog.jp%2Fentry%2F20080816%2Fp2\" title=\"Chapter 6: Working with Sets - \u7406\u7cfb\u5b66\u751f\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","description":"**6-1 A={L, M, N, O, P} B={P, Q, R, S, T} -A union B = {L, M, N, O, P, Q, R, S, T} -A union all B = {L, M, N, O, P, P, Q, R, S, T} -A intersect B = {P} -A except B = {L, M, N, O, Q, R, S, T} **6-2 |mysql| mysql> SELECT fname, lname FROM individual -> UNION -> SELECT fname, lname FROM employee; ||< *\u2026","url":"https://kiririmode.hatenablog.jp/entry/20080816/p2","height":"190","type":"rich"}