batch updating of Database Table data in Mysql

HiI have two tables.

tbl1

id             int(11)      NOT NULL

positionName   varchar(20)  NULL

positionId     int(11)      NULL

tbl2

positionId         int(11)      NOT NULL

positionName       varchar(20)  NULL

Originally, there is no column positionId in tbl1. Now will use positionId instead of positionName for tbl1.

The problem is there are over thousands of data already stored in both tables.

So, How can I successfully and quickly link to the correct positionId for the each data of tbl1 , in which position开发者_如何学运维Name was previously used?

Is batch updating is a way?

Is there anyway that I can perform all things with SQL browser? If possible, I don't want to use coding.

Thanks ahead.

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Are you looking for a multiple-table UPDATE, like this?

UPDATE tbl1
JOIN tbl2 ON tbl1.positionName = tbl2.positionName
SET tbl1.positionId = tbl2.positionId
WHERE tbl1.positionId IS NULL

I'm assuming that positionName is unique in tbl2, but if it isn't, you'll need to consider how you wish to handle that.