需要MySQL查询以将记录从table2更新/添加到table1

Question

I want MySQL query to update/Add table1 if data exist in table2

If record not exist in table1 than add record (from table2) otherwise update it.

Thanking you in advance.

Answer 1

IF (EXISTS (SELECT * FROM table1 WHERE <condition>)) 
begin 
UPDATE table1
SET <specify new value>
end
else 
begin 
INSERT INTO table1
SELECT <column list> from table2 where <condition>
end

Answer 2

You can copy all entries from table2 to table1 using the following syntax, assuming ID is the primary key of the tables:

INSERT INTO table1 SELECT * FROM table2 WHERE ID NOT IN (SELECT ID FROM table1);

The Update-Query is not so generic:

UPDATE table1 SET <COL>=(SELECT <COL> FROM table2 WHERE table1.ID=table2.ID);

You'll have to perform the above update query for each Column in your tables.