{"id":2952,"date":"2017-12-11T17:42:28","date_gmt":"2017-12-11T09:42:28","guid":{"rendered":"http:\/\/cn.hostease.com\/xueyuan\/?p=2952"},"modified":"2017-12-11T17:42:28","modified_gmt":"2017-12-11T09:42:28","slug":"%e9%81%bf%e5%85%8dmysql%e6%9b%bf%e6%8d%a2%e9%80%bb%e8%be%91sql%e7%9a%84%e5%9d%91%e7%88%b9%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/xueyuan\/jishu\/shujuku\/%e9%81%bf%e5%85%8dmysql%e6%9b%bf%e6%8d%a2%e9%80%bb%e8%be%91sql%e7%9a%84%e5%9d%91%e7%88%b9%e6%93%8d%e4%bd%9c\/","title":{"rendered":"\u907f\u514dMySQL\u66ff\u6362\u903b\u8f91SQL\u7684\u5751\u7239\u64cd\u4f5c"},"content":{"rendered":"

replace into\u548cinsert into on duplicate key \u533a\u522b<\/h1>\n
\n

replace\u7684\u7528\u6cd5<\/strong><\/p>\n

\u5f53\u4e0d\u51b2\u7a81\u65f6\u76f8\u5f53\u4e8einsert\uff0c\u5176\u4f59\u5217\u9ed8\u8ba4\u503c
\n\u5f53key\u51b2\u7a81\u65f6\uff0c\u81ea\u589e\u5217\u66f4\u65b0\uff0creplace\u51b2\u7a81\u5217\uff0c\u5176\u4f59\u5217\u9ed8\u8ba4\u503c<\/p><\/blockquote>\n

Insert into \u2026on duplicate key\u7684\u7528\u6cd5<\/strong><\/p>\n

\u4e0d\u51b2\u7a81\u65f6\u76f8\u5f53\u4e8einsert\uff0c\u5176\u4f59\u5217\u9ed8\u8ba4\u503c
\n\u5f53\u4e0ekey\u51b2\u7a81\u65f6\uff0c\u53eaupdate\u76f8\u5e94\u5b57\u6bb5\u503c\u3002<\/p><\/blockquote>\n

\u5b9e\u9a8c\u5c55\u793a<\/h1>\n
\n

\u8868\u7ed3\u6784<\/strong><\/p>\n

create table helei1(
\nid int(10) unsigned NOT NULL AUTO_INCREMENT,
\nname varchar(20) NOT NULL DEFAULT ”,
\nage tinyint(3) unsigned NOT NULL default 0,
\nPRIMARY KEY(id),
\nUNIQUE KEY\u00a0uk_name<\/code>\u00a0(name<\/code>)
\n)
\nENGINE=innodb AUTO_INCREMENT=1
\nDEFAULT CHARSET=utf8;<\/p><\/blockquote>\n

\u8868\u6570\u636e<\/strong><\/p>\n

root@127.0.0.1 (helei)> select * from helei1;
\n+—-+———–+—–+
\n| id | name | age |
\n+—-+———–+—–+
\n| 1 | \u8d3a\u78ca | 26 |
\n| 2 | \u5c0f\u660e | 28 |
\n| 3 | \u5c0f\u7ea2 | 26 |
\n+—-+———–+—–+
\n3 rows in set (0.00 sec)<\/p><\/blockquote>\n

replace into\u7528\u6cd5<\/strong><\/p>\n

root@127.0.0.1 (helei)> replace into helei1 (name) values(‘\u8d3a\u78ca’);
\nQuery OK, 2 rows affected (0.00 sec)<\/p>\n

root@127.0.0.1 (helei)> select * from helei1;
\n+—-+———–+—–+
\n| id | name | age |
\n+—-+———–+—–+
\n| 2 | \u5c0f\u660e | 28 |
\n| 3 | \u5c0f\u7ea2 | 26 |
\n| 4 | \u8d3a\u78ca | 0 |
\n+—-+———–+—–+
\n3 rows in set (0.00 sec)
\nroot@127.0.0.1 (helei)> replace into helei1 (name) values(‘\u7231\u7487’);
\nQuery OK, 1 row affected (0.00 sec)<\/p>\n

root@127.0.0.1 (helei)> select * from helei1;
\n+—-+———–+—–+
\n| id | name | age |
\n+—-+———–+—–+
\n| 2 | \u5c0f\u660e | 28 |
\n| 3 | \u5c0f\u7ea2 | 26 |
\n| 4 | \u8d3a\u78ca | 0 |
\n| 5 | \u7231\u7487 | 0 |
\n+—-+———–+—–+
\n4 rows in set (0.00 sec)<\/p><\/blockquote>\n

replace\u7684\u7528\u6cd5
\n\u5f53\u6ca1\u6709key\u51b2\u7a81\u65f6\uff0creplace into \u76f8\u5f53\u4e8einsert\uff0c\u5176\u4f59\u5217\u9ed8\u8ba4\u503c
\n\u5f53key\u51b2\u7a81\u65f6\uff0c\u81ea\u589e\u5217\u66f4\u65b0\uff0creplace\u51b2\u7a81\u5217\uff0c\u5176\u4f59\u5217\u9ed8\u8ba4\u503c<\/p>\n

Insert into \u2026on duplicate key:<\/strong><\/p>\n

root@127.0.0.1 (helei)> select * from helei1;
\n+—-+———–+—–+
\n| id | name | age |
\n+—-+———–+—–+
\n| 2 | \u5c0f\u660e | 28 |
\n| 3 | \u5c0f\u7ea2 | 26 |
\n| 4 | \u8d3a\u78ca | 0 |
\n| 5 | \u7231\u7487 | 0 |
\n+—-+———–+—–+
\n4 rows in set (0.00 sec)<\/p>\n

root@127.0.0.1 (helei)> insert into helei1 (name,age) values(‘\u8d3a\u78ca’,0) on duplicate key update age=100;
\nQuery OK, 2 rows affected (0.00 sec)<\/p>\n

root@127.0.0.1 (helei)> select * from helei1;
\n+—-+———–+—–+
\n| id | name | age |
\n+—-+———–+—–+
\n| 2 | \u5c0f\u660e | 28 |
\n| 3 | \u5c0f\u7ea2 | 26 |
\n| 4 | \u8d3a\u78ca | 100 |
\n| 5 | \u7231\u7487 | 0 |
\n+—-+———–+—–+
\n4 rows in set (0.00 sec)<\/p>\n

root@127.0.0.1 (helei)> select * from helei1;
\n+—-+———–+—–+
\n| id | name | age |
\n+—-+———–+—–+
\n| 2 | \u5c0f\u660e | 28 |
\n| 3 | \u5c0f\u7ea2 | 26 |
\n| 4 | \u8d3a\u78ca | 100 |
\n| 5 | \u7231\u7487 | 0 |
\n+—-+———–+—–+
\n4 rows in set (0.00 sec)<\/p>\n

root@127.0.0.1 (helei)> insert into helei1 (name) values(‘\u7231\u7487’) on duplicate key update age=120;
\nQuery OK, 2 rows affected (0.01 sec)<\/p>\n

root@127.0.0.1 (helei)> select * from helei1;
\n+—-+———–+—–+
\n| id | name | age |
\n+—-+———–+—–+
\n| 2 | \u5c0f\u660e | 28 |
\n| 3 | \u5c0f\u7ea2 | 26 |
\n| 4 | \u8d3a\u78ca | 100 |
\n| 5 | \u7231\u7487 | 120 |
\n+—-+———–+—–+
\n4 rows in set (0.00 sec)<\/p>\n

root@127.0.0.1 (helei)> insert into helei1 (name) values(‘\u4e0d\u5b58\u5728’) on duplicate key update age=80;
\nQuery OK, 1 row affected (0.00 sec)<\/p>\n

root@127.0.0.1 (helei)> select * from helei1;
\n+—-+———–+—–+
\n| id | name | age |
\n+—-+———–+—–+
\n| 2 | \u5c0f\u660e | 28 |
\n| 3 | \u5c0f\u7ea2 | 26 |
\n| 4 | \u8d3a\u78ca | 100 |
\n| 5 | \u7231\u7487 | 120 |
\n| 8 | \u4e0d\u5b58\u5728 | 0 |
\n+—-+———–+—–+
\n5 rows in set (0.00 sec)<\/p><\/blockquote>\n

\u603b\u7ed3<\/h1>\n
\n

replace into\u8fd9\u79cd\u7528\u6cd5\uff0c\u76f8\u5f53\u4e8e\u5982\u679c\u53d1\u73b0\u51b2\u7a81\u952e\uff0c\u5148\u505a\u4e00\u4e2adelete\u64cd\u4f5c\uff0c\u518d\u505a\u4e00\u4e2ainsert \u64cd\u4f5c\uff0c\u672a\u6307\u5b9a\u7684\u5217\u4f7f\u7528\u9ed8\u8ba4\u503c\uff0c\u8fd9\u79cd\u60c5\u51b5\u4f1a\u5bfc\u81f4\u81ea\u589e\u4e3b\u952e\u4ea7\u751f\u53d8\u5316\uff0c\u5982\u679c\u8868\u4e2d\u5b58\u5728\u5916\u952e\u6216\u8005\u4e1a\u52a1\u903b\u8f91\u4e0a\u4f9d\u8d56\u4e3b\u952e\uff0c\u90a3\u4e48\u4f1a\u51fa\u73b0\u5f02\u5e38\u3002\u56e0\u6b64\u5efa\u8bae\u4f7f\u7528Insert into \u2026on duplicate key\u3002\u7531\u4e8e\u7f16\u5199\u65f6\u95f4\u4e5f\u5f88\u4ed3\u4fc3\uff0c\u6587\u4e2d\u96be\u514d\u4f1a\u51fa\u73b0\u4e00\u4e9b\u9519\u8bef\u6216\u8005\u4e0d\u51c6\u786e\u7684\u5730\u65b9\uff0c\u4e0d\u59a5\u4e4b\u5904\u6073\u8bf7\u8bfb\u8005\u6279\u8bc4\u6307\u6b63\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

replace into\u548cinsert into on duplicate key \u533a\u522b replace\u7684\u7528\u6cd5 … \u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[10],"tags":[45],"class_list":["post-2952","post","type-post","status-publish","format-standard","hentry","category-shujuku","tag-mysql"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2952","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/comments?post=2952"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2952\/revisions"}],"predecessor-version":[{"id":2953,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/posts\/2952\/revisions\/2953"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/media?parent=2952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/categories?post=2952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/xueyuan\/wp-json\/wp\/v2\/tags?post=2952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}