如何从2个数据库中选择值

Question

How can I select data in the same query from two different databases into the same server? This is what I'm doing, but my query doesn't works: Databases: db1 and db2 details is the table in db1 database details is the table in db2 database

Answer 1

You can write the query as below,

SELECT 
    mydatabase1.tbl.*, 
    mydatabase2.tbl.*, 
FROM 
   mydatabase1.tbl, mydatabase2.tbl

For your information you can write the joins, where and other clauses as normal.

Thanks Amit

Answer 2

You can use like that:

SELECT db1.table.*,  db2.table.*
FROM db1.table
INNER JOIN db2.table ON db1.table.detailcolumn = db2.table.detailcolumn 

Here db1 is the database1 , db2 is the database2

UPDATE 1:

In your example that you have shared in comments section, you can use as like that:

SELECT db1.details.name,db2.details.name 
FROM db1.details,db2.details 
WHERE db2.details.name = 'yourvalue'
AND db1.details.name = 'yourvalue'