<\/span><\/h3>\n\n\n\ngbase> create table t1(id int, value int);\nQuery OK, 0 rows affected (Elapsed: 00:00:00.18)\n\ngbase> insert into t1 values(1,'0');\nQuery OK, 1 row affected (Elapsed: 00:00:00.07)\n\ngbase> create table t2(id int, value int);\nQuery OK, 0 rows affected (Elapsed: 00:00:00.10)\n\ngbase> insert into t2 values(1,123);\nQuery OK, 1 row affected (Elapsed: 00:00:00.07)\n\ngbase> insert into t2 values(1,234);\nQuery OK, 1 row affected (Elapsed: 00:00:00.07)\n\ngbase> select * from t1;\n+------+-------+\n| id | value |\n+------+-------+\n| 1 | 0 |\n+------+-------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase> select * from t2;\n+------+-------+\n| id | value |\n+------+-------+\n| 1 | 123 |\n| 1 | 234 |\n+------+-------+\n2 rows in set (Elapsed: 00:00:00.01)\n\ngbase> update t1 set value=(select value from t2 where t2.id=t1.id);\nERROR 1709 (HY000): [10.0.2.107:5050](GBA-02AD-0005)Failed to query in gnode:\nDETAIL: (GBA-01EX-0002) Subquery return more than 1 row\nSQL: \/*::ffff:10.0.2.107_118_18_2020-09-03_20:47:02*\/ UPDATE `testdb`.`t1_n1` `testdb.t1` SET `testdb.t1`.`value` = ( SELECT `testdb.t2`.`value` as `value` From `gctmpdb`.`_tmp_1795293194_118_t51_1_1599096136_s` `testdb.t2` WHERE (`testdb.t2`.`id` = `testdb.t1`.`id`));\ngbase> update t1,t2 set t1.value=t2.value where t1.id=t2.id;\nERROR 1709 (HY000): [10.0.2.107:5050](GBA-02AD-0005)Failed to query in gnode:\nDETAIL: (GBA-01EX-700) Gbase general error: can not update one row to multi-data\nSQL: \/*::ffff:10.0.2.107_118_19_2020-09-03_20:47:28*\/ UPDATE `gctmpdb`._tmp_1795293194_118_t52_1_1599096136_s INNER JOIN `testdb`.`t1_n1` `testdb.t1` ON (`testdb.t1`.`id` = `_tmp_1795293194_118_t52_1_1599096136_s`.`id`) SET `testdb.t1`.`value` = `_tmp_1795293194_118_t52_1_1599096136_s`.`testdb.t1.value`;\ngbase>\n<\/code><\/pre>\n\n\n\n<\/span>Solution<\/span><\/h3>\n\n\n\n\u9996\u5148\u4ece\u4e1a\u52a1\u4e0a\u8981\u907f\u514d\u8fd9\u79cd1\uff1an\u66f4\u65b0\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n
\u5982\u679c\u5b9e\u5728\u907f\u514d\u4e0d\u4e86\uff0c\u5bf9\u4e8e\u5b50\u67e5\u8be2\uff0c\u53ef\u4ee5\u7528limit\u9650\u5b9a\u7ed3\u679c\u96c6\u3002\u6bd4\u5982<\/p>\n\n\n\n
gbase> update t1 set value=(select value from t2 where t2.id=t1.id limit 1);\nQuery OK, 1 row affected (Elapsed: 00:00:00.28)\nRows matched: 1 Changed: 1 Warnings: 0\n\ngbase> select * from t1;\n+------+-------+\n| id | value |\n+------+-------+\n| 1 | 234 |\n+------+-------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n\u5bf9\u4e8e\u591a\u8868\u5173\u8054\u66f4\u65b0\uff0c\u65e0\u89e3\u3002\u8bf7\u8c03\u6574\u4e1a\u52a1\u6216\u6539\u5199SQL\u3002<\/p>","protected":false},"excerpt":{"rendered":"
\u5357\u5927\u901a\u7528GBase 8a\u5728update\u65f6\uff0c\u5bf9\u4e8e\u7cbe\u786e\u7684\u6761\u4ef6\uff0c\u53ea\u80fd\u6709\u4e00\u4e2a\u7cbe\u786e\u5730\u503c\u3002 \u5982\u679c\u5b58\u5728\u591a\u4e2a\uff0c\u5219\u4f1a\u62a5 can not update one row to multi-data \u9519\u8bef\uff0c\u5982\u679c\u662f\u5728\u5b50\u67e5\u8be2\u4e2d\uff0c\u4f1a\u62a5 Subquery return more than 1 row\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-1032","post","type-post","status-publish","format-standard","hentry","category-gbase8a"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/1032","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=1032"}],"version-history":[{"count":1,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/1032\/revisions"}],"predecessor-version":[{"id":1033,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/1032\/revisions\/1033"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=1032"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=1032"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=1032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}