<\/span><\/h2>\n\n\n\nselect\u7684\u5217\uff0c\u4e0d\u662fgroup\u7684\u5217\uff0c\u4e5f\u4e0d\u662f\u805a\u5408\u5217\u3002\u5728\u65b0\u7248\u768485\u548c\u6240\u670986\u7248\u672c\u91cc\uff0c\u4e0d\u518d\u5141\u8bb8\u975egroup\u548c\u805a\u5408\u5217\u51fa\u73b0\u5728select\u91cc\u9762\u3002<\/p>\n\n\n\n
gbase> desc t2;\n+-------+---------+------+-----+---------+-------+\n| Field | Type | Null | Key | Default | Extra |\n+-------+---------+------+-----+---------+-------+\n| a | int(11) | YES | | NULL | |\n| b | int(11) | YES | | NULL | |\n| c | int(11) | YES | | NULL | |\n+-------+---------+------+-----+---------+-------+\n3 rows in set (Elapsed: 00:00:00.00)\n\ngbase> select a,sum(b),c from t2 group by a;\nERROR 1055 (42000): 'testdb.t2.c' isn't in GROUP BY\n<\/code><\/pre>\n\n\n\n<\/span>\u89e3\u51b3\uff1a<\/span><\/h2>\n\n\n\na)\u53bb\u6389\u4e0d\u7b26\u5408\u8981\u6c42\u7684\u5217\u3002\u5f3a\u70c8\u5efa\u8bae\u5982\u6b64\u64cd\u4f5c\u3002<\/p>\n\n\n\n
b)\u6062\u590d\u5230\u8001\u7248\u672c\u7684\u517c\u5bb9\u6a21\u5f0f\uff0c\u4f46\u4ece\u8bed\u4e49\u4e0a\u65e0\u6cd5\u4fdd\u8bc1\u7ed3\u679c\u7684\u4e00\u81f4\u6027\u3002<\/p>\n\n\n\n
\u5c06\u96c6\u7fa4\u53c2\u6570SQL_MODE\u4e2d\u7684ONLY_FULL_GROUP_BY\u53bb\u6389\u3002\u9ed8\u8ba4\u503c\u5982\u4e0b\uff1a<\/p>\n\n\n\n
PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE,ONLY_FULL_GROUP_BY,NO_AUTO_VALUE_ON_ZERO,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION,PAD_CHAR_TO_FULL_LENGTH<\/p>\n\n\n\n
<\/span>\u4fee\u6539SQL_MODE\u7684\u4f8b\u5b50<\/span><\/h2>\n\n\n\n<\/span>\u6570\u636e<\/span><\/h3>\n\n\n\ngbase> select * from a1;\r\n+------+------+------------+--------+\r\n| id | name | birthday | salary |\r\n+------+------+------------+--------+\r\n| 1 | 1111 | 2011-11-11 | 10000 |\r\n| 2 | 2222 | 2011-12-12 | 20000 |\r\n| 3 | 3333 | 2011-12-13 | 10000 |\r\n+------+------+------------+--------+\r\n3 rows in set (Elapsed: 00:00:00.01)<\/code><\/pre>\n\n\n\n<\/span>\u67e5\u8be2\u6548\u679c<\/span><\/h3>\n\n\n\n\u5305\u542b\u4e0d\u7b26\u5408\u6761\u4ef6\u7684\u5217\u65f6\uff0c\u76f4\u63a5\u62a5\u9519 ERROR 1140 (42000): Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause<\/p>\n\n\n\n
gbase> select max(salary) from a1;\r\n+-------------+\r\n| max(salary) |\r\n+-------------+\r\n| 20000 |\r\n+-------------+\r\n1 row in set (Elapsed: 00:00:00.02)\r\n\r\ngbase> select id,name,birthday,max(salary) from a1;\r\nERROR 1140 (42000): Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause<\/code><\/pre>\n\n\n\n<\/span>\u4fee\u6539\u53c2\u6570<\/span><\/h3>\n\n\n\ngbase> show variables like '%sql_mode%';\r\n+---------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\r\n| Variable_name | Value |\r\n+---------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\r\n| sql_mode | PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE,ONLY_FULL_GROUP_BY,NO_AUTO_VALUE_ON_ZERO,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION,PAD_CHAR_TO_FULL_LENGTH |\r\n+---------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\r\n1 row in set (Elapsed: 00:00:00.00)\r\n\r\ngbase> set sql_mode='PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE,NO_AUTO_VALUE_ON_ZERO,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION,PAD_CHAR_TO_FULL_LENGTH';\r\nQuery OK, 0 rows affected (Elapsed: 00:00:00.00)\r\n\r\ngbase> show variables like '%sql_mode%';\r\n+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\r\n| Variable_name | Value |\r\n+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\r\n| sql_mode | PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE,NO_AUTO_VALUE_ON_ZERO,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION,PAD_CHAR_TO_FULL_LENGTH |\r\n+---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+\r\n1 row in set (Elapsed: 00:00:00.01)<\/code><\/pre>\n\n\n\n<\/span>\u518d\u6b21\u67e5\u8be2<\/span><\/h3>\n\n\n\n\u4e0d\u7b26\u5408\u6761\u4ef6\u7684\u5217\uff0c\u53ef\u4ee5\u67e5\u8be2\u51fa\u6765\u4e86\uff0c\u4f46\u5176\u53ea\u662f\u4ece\u7b26\u5408where\u548cgroup\u5206\u7ec4\u7684\u6570\u636e\u4e2d\uff0c\u4efb\u610f\u9009\u4e00\u884c\u8fd4\u56de\uff0c\u4e0d\u786e\u4fdd\u987a\u5e8f\u3002<\/p>\n\n\n\n
gbase> select id,name, max(birthday),salary from a1;\r\n+------+------+---------------+--------+\r\n| id | name | max(birthday) | salary |\r\n+------+------+---------------+--------+\r\n| 1 | 1111 | 2011-12-13 | 10000 |\r\n+------+------+---------------+--------+\r\n1 row in set (Elapsed: 00:00:00.03)\r\n\r\ngbase> select id,name, max(birthday),salary from a1 group by salary;\r\n+------+------+---------------+--------+\r\n| id | name | max(birthday) | salary |\r\n+------+------+---------------+--------+\r\n| 1 | 1111 | 2011-12-13 | 10000 |\r\n| 2 | 2222 | 2011-12-12 | 20000 |\r\n+------+------+---------------+--------+\r\n2 rows in set (Elapsed: 00:00:00.06)<\/code><\/pre>","protected":false},"excerpt":{"rendered":"\u5357\u5927\u901a\u7528GBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\uff0c\u5728\u5904\u7406group\u7684select \u5217\u65f6\uff0c\u8981\u6c42\u5176\u5fc5\u987b\u662fgroup\u7684\u5217\u6216\u8005\u805a\u5408\u8fd0\u7b97\u7684\u5217\uff0c\u5426\u5219\u4f1a\u62a5isn't in GROUP BY\u7684\u9519\u8bef\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[],"class_list":["post-755","post","type-post","status-publish","format-standard","hentry","category-gbase8a"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/755","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=755"}],"version-history":[{"count":7,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/755\/revisions"}],"predecessor-version":[{"id":7919,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/755\/revisions\/7919"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=755"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=755"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}