gbase> select * from t_chengji where fenshu<=80;\n+--------+---------+--------+\n| name | kecheng | fenshu |\n+--------+---------+--------+\n| \u5f20\u4e09 | \u6570\u5b66 | 75 |\n| \u674e\u56db | \u8bed\u6587 | 76 |\n+--------+---------+--------+\n2 rows in set (Elapsed: 00:00:00.00)<\/code><\/pre>\n\n\n\n\u901a\u8fc7distinct name \u53bb\u6389\u53ef\u80fd\u91cd\u590d\u7684\u6570\u636e\uff0c\u7a0d\u5fae\u63d0\u5347\u70b9\u6027\u80fd\u3002<\/p>\n\n\n\n
gbase> select distinct name from t_chengji where fenshu<=80;\n+--------+\n| name |\n+--------+\n| \u674e\u56db |\n| \u5f20\u4e09 |\n+--------+\n2 rows in set (Elapsed: 00:00:00.05)<\/code><\/pre>\n\n\n\n<\/span>\u83b7\u5f97\u6240\u6709\u4eba\u5458\u540d\u5b57\u5217\u8868<\/span><\/h4>\n\n\n\n\u76f4\u63a5\u5168\u8868\u4e0d\u5e26\u6761\u4ef6\u7684distinct name\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n
gbase> select distinct name from t_chengji;\n+--------+\n| name |\n+--------+\n| \u5f20\u4e09 |\n| \u738b\u4e94 |\n| \u674e\u56db |\n+--------+\n3 rows in set (Elapsed: 00:00:00.05)<\/code><\/pre>\n\n\n\n<\/span>\u6240\u6709\u540d\u5b57\u6263\u9664\u6709\u79d1\u76ee\u5c0f\u4e8e\u7b49\u4e8e80\u7684\u5c31\u662f\u6240\u6709\u79d1\u76ee\u5927\u4e8e80\u5206\u7684\u3002<\/span><\/h4>\n\n\n\ngbase> select distinct name from t_chengji where name not in (select distinct name from t_chengji where fenshu<=80);\n+--------+\n| name |\n+--------+\n| \u738b\u4e94 |\n+--------+\n1 row in set (Elapsed: 00:00:00.10)<\/code><\/pre>\n\n\n\n<\/span>\u65b9\u68482<\/span><\/h3>\n\n\n\n<\/span>\u83b7\u5f97\u6bcf\u4e2a\u59d3\u540d\u7684\u6700\u9ad8\u5206\u548c\u6700\u4f4e\u5206<\/span><\/h4>\n\n\n\ngbase> select name,min(fenshu),max(fenshu) from t_chengji group by name;\n+--------+-------------+-------------+\n| name | min(fenshu) | max(fenshu) |\n+--------+-------------+-------------+\n| \u674e\u56db | 76 | 90 |\n| \u5f20\u4e09 | 75 | 81 |\n| \u738b\u4e94 | 81 | 100 |\n+--------+-------------+-------------+\n3 rows in set (Elapsed: 00:00:00.04)<\/code><\/pre>\n\n\n\n<\/span>\u7136\u540e\u8fc7\u6ee4\u6700\u4f4e\u5206\u5927\u4e8e80\u7684<\/span><\/h4>\n\n\n\ngbase> select name,min(fenshu),max(fenshu) from t_chengji group by name having min(fenshu)>80;\n+--------+-------------+-------------+\n| name | min(fenshu) | max(fenshu) |\n+--------+-------------+-------------+\n| \u738b\u4e94 | 81 | 100 |\n+--------+-------------+-------------+\n1 row in set (Elapsed: 00:00:00.07)\n\ngbase> select name from t_chengji group by name having min(fenshu)>80; +--------+\n| name |\n+--------+\n| \u738b\u4e94 |\n+--------+\n1 row in set (Elapsed: 00:00:00.05)\n<\/code><\/pre>\n\n\n\n<\/span>\u67e5\u770b\u79d1\u76ee\u8bed\u6587\u6210\u7ee9\uff0c\u6bd4\u79d1\u76ee\u6570\u5b66\u6210\u7ee9\u9ad8\u7684\u4eba\u5458<\/span><\/h2>\n\n\n\ngbase> select * from t_chengji tc1 left join t_chengji tc2 on tc2.name=tc1.name and tc2.kecheng='\u6570\u5b66' where tc1.kecheng='\u8bed\u6587' ;\r\n+--------+---------+--------+--------+---------+--------+\r\n| name | kecheng | fenshu | name | kecheng | fenshu |\r\n+--------+---------+--------+--------+---------+--------+\r\n| \u5f20\u4e09 | \u8bed\u6587 | 81 | \u5f20\u4e09 | \u6570\u5b66 | 75 |\r\n| \u674e\u56db | \u8bed\u6587 | 76 | \u674e\u56db | \u6570\u5b66 | 90 |\r\n| \u738b\u4e94 | \u8bed\u6587 | 81 | \u738b\u4e94 | \u6570\u5b66 | 100 |\r\n+--------+---------+--------+--------+---------+--------+\r\n3 rows in set (Elapsed: 00:00:00.05)\r\n\r\ngbase> select * from t_chengji tc1 left join t_chengji tc2 on tc2.name=tc1.name and tc2.kecheng='\u6570\u5b66' where tc1.kecheng='\u8bed\u6587' and tc1.fenshu > tc2.fenshu ;\r\n+--------+---------+--------+--------+---------+--------+\r\n| name | kecheng | fenshu | name | kecheng | fenshu |\r\n+--------+---------+--------+--------+---------+--------+\r\n| \u5f20\u4e09 | \u8bed\u6587 | 81 | \u5f20\u4e09 | \u6570\u5b66 | 75 |\r\n+--------+---------+--------+--------+---------+--------+\r\n1 row in set (Elapsed: 00:00:00.15)\r\n<\/code><\/pre>","protected":false},"excerpt":{"rendered":"\u672c\u6587\u4ecb\u7ecd\u4e00\u4e2a\u6570\u636e\u5e93SQL\u9762\u8bd5\u9898\uff0c\u7528\u4e00\u6761SQL \u8bed\u53e5 \u67e5\u8be2\u51fa\u6bcf\u95e8\u8bfe\u90fd\u5927\u4e8e80 \u5206\u7684\u5b66\u751f\u59d3\u540d\u3002\u7ed9\u51fa\u5206\u6790\u8fc7\u7a0b\u548c\u89e3\u7b54\u7ed3\u679c\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[81],"class_list":["post-7557","post","type-post","status-publish","format-standard","hentry","category-gbase8a","tag-81"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/7557","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/comments?post=7557"}],"version-history":[{"count":11,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/7557\/revisions"}],"predecessor-version":[{"id":7622,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/7557\/revisions\/7622"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=7557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=7557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=7557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}