解決mysql修改表記錄1093錯誤 1.需求 ： 已知表信息如下 ： 表名 ：frjg 表結構： [sql] DROP TABLE IF EXISTS `frjg`; CREATE TABLE IF NOT EXISTS `frjg` ( `id` int(11) NOT NULL AUTO_INCREMENT, `jgbh` varchar(3) CHARACTER SET utf8 NOT NULL COMMENT '法人機構編號', `jgmc` varchar(50) CHARACTER SET utf8 NOT NULL COMMENT '機構名稱', `jgm` varchar(8) CHARACTER SET utf8 NOT NULL COMMENT '機構碼', `htqssj` date NOT NULL COMMENT '合同起始時間', `htyxsj` date NOT NULL COMMENT '合同有效時間', `dxfsl` int(11) NOT NULL COMMENT '短信發送總量', `dxsyl` int(11) NOT NULL COMMENT '短信剩余量', `mbkhl` int(11) NOT NULL COMMENT '目標客戶量', `cjsj` datetime NOT NULL COMMENT '創建時間', `lastactive` datetime NOT NULL COMMENT '最後一次操作時間', `xmmc` varchar(50) CHARACTER SET utf8 NOT NULL COMMENT '項目名稱', `cjr` varchar(50) CHARACTER SET utf8 DEFAULT NULL COMMENT '創建人', `state` int(11) NOT NULL DEFAULT '1' COMMENT '法人機構當前狀態，0：正常，1：關閉', `weight` int(11) DEFAULT '0' COMMENT '權重，當生育量小時，判斷分給誰', `spbz` int(11) DEFAULT '0' COMMENT '審批標准，當大於此標志時，任務掛起，短信通知', `jgjc` varchar(50) DEFAULT NULL COMMENT '機構簡稱', PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=gbk AUTO_INCREMENT=121 ; -- -- 轉存表中的數據 `frjg` -- INSERT INTO `frjg` (`id`, `jgbh`, `jgmc`, `jgm`, `htqssj`, `htyxsj`, `dxfsl`, `dxsyl`, `mbkhl`, `cjsj`, `lastactive`, `xmmc`, `cjr`, `state`, `weight`, `spbz`, `jgjc`) VALUES (1, '001', '省管理中心', '27000099', '2012-08-29', '2014-09-01', 200000, 200000, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (2, '002', '臨渭區聯社管理中心', '27050199', '2012-08-29', '2014-09-01', 200000, 199973, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (3, '003', '新城區聯社管理中心', '27011399', '2012-08-29', '2014-09-01', 200000, 199954, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (4, '004', '碑林區聯社管理中心', '27010199', '2012-08-29', '2014-09-01', 200000, 199977, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (5, '005', '灞橋聯社管理中心', '27010499', '2012-08-29', '2014-09-01', 200000, 199975, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (6, '006', '雁塔聯社管理中心', '27010299', '2012-08-29', '2014-09-01', 200000, 199871, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (7, '007', '未央區聯社管理中心', '27010399', '2012-08-29', '2014-09-01', 200000, 199928, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (8, '008', '蓮湖聯社管理中心', '27010599', '2012-08-29', '2014-09-01', 200000, 199960, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (9, '009', '臨潼聯社管理中心', '27010699', '2012-08-29', '2014-09-01', 200000, 199990, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (10, '010', '西安市閻良區聯社管理中心', '27010799', '2012-08-29', '2014-09-01', 200000, 199978, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (11, '011', '長安區信用聯社管理中心', '27010899', '2012-08-29', '2014-09-01', 200000, 199956, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (12, '012', '周至聯社管理中心', '27011099', '2012-08-29', '2014-09-01', 200000, 199995, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (13, '013', '高陵聯社管理中心', '27011199', '2012-08-29', '2014-09-01', 200000, 199985, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (14, '014', '藍田聯社管理中心', '27011299', '2012-08-29', '2014-09-01', 200000, 199949, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (15, '015', '戶縣管理中心', '27010999', '2012-08-29', '2014-09-01', 200000, 199987, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (16, '016', '金台區信用聯社管理中心', '27030299', '2012-08-29', '2014-09-01', 200000, 199957, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (17, '017', '渭濱信用聯社管理中心', '27030199', '2012-08-29', '2014-09-01', 200000, 199981, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (18, '018', '鹹陽市渭城區聯社管理中心', '27040299', '2012-08-29', '2014-09-01', 200000, 199987, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL), (19, '019', '鹹陽市秦都區聯社管理中心', '27040199', '2012-08-29', '2014-09-01', 200000, 199979, 10000, '2012-07-26 00:00:00', '2012-08-08 15:38:00', 'test2', 'zichen', 0, 0, 0, NULL); 需求如下：需要將表記錄中各自的 jgmc 字段值賦給各自的 jgjc 2.解決辦法： 錯誤實現方法： [sql] update frjg set frjg.jgjc=(select jgmc from frjg f where f.id=frjg.id ) where 1 執行SQL命令，報錯。錯誤信息為 [sql] #1093 - You can't specify target table 'frjg' for update in FROM clause 正確實現方法，需要建立一張中間表，中間表的內容和frjg表完全相同，之後進行修改frjg表，中間和frjg表之間存在“主外鍵關系”（並不存在這種關系）： [sql] create table tmp as (select * FROM frjg WHERE 1 ); update frjg SET jgjc = (SELECT jgmc FROM tmp WHERE frjg.id=tmp.id ) WHERE 1; drop table tmp;
