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更新时间：2024-12-10 GMT+08:00

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REPLACE

MySQL的REPLACE操作形式包括：LOW_PRIORITY、PARTITION 、DELAYED 、VALUES、SET；（下述迁移示例为临时迁移方案）

REPLACE的工作方式与INSERT完全相同，不同之处在于，如果表中的旧行与主键或唯一索引的新行具有相同的值，则在插入新行之前删除该旧行。

LOW_PRIORITY

MySQL REPLACE支持使用LOW_PRIORITY ，DSC工具将对其进行转换。

输入

    
         # LOW_PRIORITY 低优先级
Replace LOW_PRIORITY INTO  exmp_tb2 VALUES(1, '128.23', 'nice', '2018-10-11 19:00:00');
Replace LOW_PRIORITY INTO  exmp_tb2 VALUES(2, DEFAULT, 'nice', '2018-12-14 19:00:00' );
Replace LOW_PRIORITY INTO  exmp_tb2 VALUES(3, DEFAULT, 'nice', DEFAULT);
Replace LOW_PRIORITY INTO  exmp_tb2 (tb2_id, tb2_price) VALUES(5, DEFAULT);
Replace LOW_PRIORITY INTO  exmp_tb2 (tb2_id, tb2_price, tb2_note) VALUES(4, DEFAULT, DEFAULT);

输出

    
         -- LOW_PRIORITY 低优先级
INSERT INTO "public"."exmp_tb2"  VALUES (1,'128.23','nice','2018-10-11 19:00:00');
INSERT INTO "public"."exmp_tb2"  VALUES (2,DEFAULT,'nice','2018-12-14 19:00:00');
INSERT INTO "public"."exmp_tb2"  VALUES (3,DEFAULT,'nice',DEFAULT);
INSERT INTO "public"."exmp_tb2" ("tb2_id","tb2_price") VALUES (5,DEFAULT);
INSERT INTO "public"."exmp_tb2" ("tb2_id","tb2_price","tb2_note") VALUES (4,DEFAULT,DEFAULT);

PARTITION

MySQL REPLACE支持使用PARTITION关键字和分区，子分区或两者的逗号分隔名称列表显式分区选择。

输入

    
         replace INTO employees PARTITION(p3) VALUES (19, 'Frank1', 'Williams', 1, 2);
replace INTO employees PARTITION(p0) VALUES (4, 'Frank1', 'Williams', 1, 2);
replace INTO employees PARTITION(p1) VALUES (9, 'Frank1', 'Williams', 1, 2);
replace INTO employees PARTITION(p2) VALUES (10, 'Frank1', 'Williams', 1, 2);
replace INTO employees PARTITION(p2) VALUES (11, 'Frank1', 'Williams', 1, 2);

输出

    
         INSERT INTO "public"."employees"  VALUES (19,'Frank1','Williams',1,2);
INSERT INTO "public"."employees"  VALUES (4,'Frank1','Williams',1,2);
INSERT INTO "public"."employees"  VALUES (9,'Frank1','Williams',1,2);
INSERT INTO "public"."employees"  VALUES (10,'Frank1','Williams',1,2);
INSERT INTO "public"."employees"  VALUES (11,'Frank1','Williams',1,2);

DELAYED

DELAYED插入和替换在MySQL 5.6中被弃用。在MySQL 5.7中，DELAYED不支持。服务器识别但忽略DELAYED关键字，将替换处理为非延迟替换，并生成ER_WARN_LEGACY_SYNTAX_CONVERTED警告。
REPLACE DELAYED不再被支持，语句被转换为REPLACE。
DELAYED 关键字将在未来版本中被删除。

输入

    
         #DELAYED INSERT DELAYED works only with MyISAM, MEMORY, ARCHIVE, and BLACKHOLE tables. 
#If you execute INSERT DELAYED with another storage engine, 
#you will get an error like this: ERROR 1616 (HY000): DELAYED option not supported 
Replace DELAYED INTO  exmp_tb2 VALUES(10, 128.23, 'nice', '2018-10-11 19:00:00');
Replace DELAYED INTO  exmp_tb2 VALUES(6, DEFAULT, 'nice', '2018-12-14 19:00:00');
Replace DELAYED INTO  exmp_tb2 VALUES(7, 20, 'nice', DEFAULT);
Replace DELAYED INTO  exmp_tb2 (tb2_id, tb2_price) VALUES(11, DEFAULT);
Replace DELAYED INTO  exmp_tb2 (tb2_id, tb2_price, tb2_note) VALUES(12, DEFAULT, DEFAULT);
Replace DELAYED INTO  exmp_tb2 (tb2_id, tb2_price, tb2_note, tb2_date) VALUES(13, DEFAULT, DEFAULT, DEFAULT);

输出

    
         --DELAYED INSERT DELAYED works only with MyISAM, MEMORY, ARCHIVE, and BLACKHOLE tables. 
--If you execute INSERT DELAYED with another storage engine, 
--you will get an error like this: ERROR 1616 (HY000): DELAYED option not supported. 
INSERT INTO "public"."exmp_tb2"  VALUES (10,128.23,'nice','2018-10-11 19:00:00');
INSERT INTO "public"."exmp_tb2"  VALUES (6,DEFAULT,'nice','2018-12-14 19:00:00');
INSERT INTO "public"."exmp_tb2"  VALUES (7,20,'nice',DEFAULT);
INSERT INTO "public"."exmp_tb2" ("tb2_id","tb2_price") VALUES (11,DEFAULT);
INSERT INTO "public"."exmp_tb2" ("tb2_id","tb2_price","tb2_note") VALUES (12,DEFAULT,DEFAULT);
INSERT INTO "public"."exmp_tb2" ("tb2_id","tb2_price","tb2_note","tb2_date") VALUES (13,DEFAULT,DEFAULT,DEFAULT);

VALUES

MySQL REPLACE支持一条语句插入或删除多值，以逗号分隔。

输入

    
         #有数据的话则替换replace，没有的话则插入新的数据同INSERT
Replace INTO  exmp_tb1 (tb1_id,tb1_name,tb1_gender,tb1_address,tb1_number) VALUES(17,'David','male','NewYork11','01015827875'),(18,'Rachel','female','NewYork22','01015827749'),(20,'Monica','female','NewYork','010158996743');
Replace INTO  exmp_tb1 (tb1_id,tb1_name,tb1_gender,tb1_address,tb1_number) VALUES(17,'David1','male','NewYork11','01015827875'),(21,'Rachel','female','NewYork22','01015827749'),(22,'Monica','female','NewYork','010158996743');
Replace INTO  exmp_tb1 (tb1_id,tb1_name,tb1_gender,tb1_address,tb1_number,tb1_date) VALUES(17,'David2',DEFAULT,'NewYork11','01015827875',DEFAULT),(18,'Rachel','female',DEFAULT,'01015827749','2018-12-14 10:44:20'),(DEFAULT,'Monica','female',DEFAULT,DEFAULT,'2018-12-14 10:44:20');
Replace INTO  exmp_tb1 VALUES(DEFAULT,'David',DEFAULT,'NewYork11','01015827875',DEFAULT),(18,'Rachel','female',DEFAULT,'01015827749','2018-12-14 10:44:20'),(DEFAULT,'Monica','female',DEFAULT,DEFAULT,'2018-12-14 10:44:20');

输出

    
         --有数据的话则替换replace，没有的话则插入新的数据同INSERT
INSERT INTO "public"."exmp_tb1" ("tb1_id","tb1_name","tb1_gender","tb1_address","tb1_number") VALUES (17,'David','male','NewYork11','01015827875');
INSERT INTO "public"."exmp_tb1" ("tb1_id","tb1_name","tb1_gender","tb1_address","tb1_number") VALUES (18,'Rachel','female','NewYork22','01015827749');
INSERT INTO "public"."exmp_tb1" ("tb1_id","tb1_name","tb1_gender","tb1_address","tb1_number") VALUES (20,'Monica','female','NewYork','010158996743');
INSERT INTO "public"."exmp_tb1" ("tb1_id","tb1_name","tb1_gender","tb1_address","tb1_number") VALUES (17,'David1','male','NewYork11','01015827875');
INSERT INTO "public"."exmp_tb1" ("tb1_id","tb1_name","tb1_gender","tb1_address","tb1_number") VALUES (21,'Rachel','female','NewYork22','01015827749');
INSERT INTO "public"."exmp_tb1" ("tb1_id","tb1_name","tb1_gender","tb1_address","tb1_number") VALUES (22,'Monica','female','NewYork','010158996743');
INSERT INTO "public"."exmp_tb1" ("tb1_id","tb1_name","tb1_gender","tb1_address","tb1_number","tb1_date") VALUES (17,'David2',DEFAULT,'NewYork11','01015827875',DEFAULT);
INSERT INTO "public"."exmp_tb1" ("tb1_id","tb1_name","tb1_gender","tb1_address","tb1_number","tb1_date") VALUES (18,'Rachel','female',DEFAULT,'01015827749','2018-12-14 10:44:20');
INSERT INTO "public"."exmp_tb1" ("tb1_id","tb1_name","tb1_gender","tb1_address","tb1_number","tb1_date") VALUES (DEFAULT,'Monica','female',DEFAULT,DEFAULT,'2018-12-14 10:44:20');
INSERT INTO "public"."exmp_tb1"  VALUES (DEFAULT,'David',DEFAULT,'NewYork11','01015827875',DEFAULT);
INSERT INTO "public"."exmp_tb1"  VALUES (18,'Rachel','female',DEFAULT,'01015827749','2018-12-14 10:44:20');
INSERT INTO "public"."exmp_tb1"  VALUES (DEFAULT,'Monica','female',DEFAULT,DEFAULT,'2018-12-14 10:44:20');

SET

MySQL REPLACE支持使用SET设置值，DSC工具将对其转换。

输入

    
         replace INTO `runoob_datatype_test` VALUES (100, 100, 100, 0, 1);
replace INTO `runoob_datatype_test` VALUES (100.23, 100.25, 100.26, 0.12,1.5);
replace INTO `runoob_datatype_test` (dataType_numeric,dataType_numeric1) VALUES (100.23, 100.25);
replace INTO `runoob_datatype_test` (dataType_numeric,dataType_numeric1,dataType_numeric2) VALUES (100.23, 100.25, 2.34);
replace into runoob_datatype_test set dataType_numeric=23.1, dataType_numeric4 = 25.12 ;

输出

    
         INSERT INTO "public"."runoob_datatype_test"  VALUES (100,100,100,0,1);
INSERT INTO "public"."runoob_datatype_test"  VALUES (100.23,100.25,100.26,0.12,1.5);
INSERT INTO "public"."runoob_datatype_test" ("datatype_numeric","datatype_numeric1") VALUES (100.23,100.25);
INSERT INTO "public"."runoob_datatype_test" ("datatype_numeric","datatype_numeric1","datatype_numeric2") VALUES (100.23,100.25,2.34);
INSERT INTO "public"."runoob_datatype_test" ("datatype_numeric","datatype_numeric4") VALUES (23.1,25.12);

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