[英]How to update a row from one table to another?
我嘗試將表的某些行更新為不同的表,現在我只是想知道如何從一個表插入一行到另一個表,如:
INSERT INTO dialecte_org_5.tb_data_iae (
SELECT * FROM dialecte_org_88.tb_data_iae WHERE id_dialecte = 2413
);
什么可能是相同的聲明,但更新? 有沒有辦法做這樣的事情,如果行存在 - >“更新”,如果不是“插入”
謝謝
對於插入,您通常要為insert語句和select指定完整字段列表( http://dev.mysql.com/doc/refman/5.5/en/insert.html ):
INSERT INTO dialecte_org_5.tb_data_iae (field1, field2, field3)
SELECT field1, field2, field3
FROM dialecte_org_88.tb_data_iae WHERE id_dialecte=2413;
更新聲明更像是這樣( http://dev.mysql.com/doc/refman/5.0/en/update.html ):
UPDATE dialecte_org_5.tb_data_iae t1
INNER JOIN dialecte_org_88.tb_data_iae t2 ON t1.id = t2.id
SET t1.field1 = t2.field1, t1.field2 = t2.field2, t1.field3 = t2.field3
WHERE t2.id_dialecte=2413
您也可以使用REPLACE INTO,它同時執行這兩種操作,但是特定於MySQL,不受其他RDBMS的支持( http://dev.mysql.com/doc/refman/5.0/en/replace.html ):
REPLACE INTO dialecte_org_5.tb_data_iae t1
INNER JOIN dialecte_org_88.tb_data_iae t2 ON t1.id = t2.id
SET t1.field1 = t2.field1, t1.field2 = t2.field2, t1.field3 = t2.field3
WHERE t2.id_dialecte=2413
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