How to query multiple databases with one SQL statement

A SQL statement how to query multiple databases, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

Requirements: a SQL statement queries the associated results from multiple databases and outputs them to the client

Survey: spring framework can configure multiple data sources; sql can also attach multiple databases to a master database

Solution: add multiple libraries to the main library with ATTACH DATABASE statement to realize the function

Syntax:

ATTACH DATABASE 'DatabaseName' As' Alias-Name'

Example:

ATTACH DATABASE'C:\ Users\ Administrator\ Desktop\ sqlite_data.sq3' As' sd';, is it helpful for you to read the above content? If you want to know more about the relevant knowledge or read more related articles, please follow the industry information channel, thank you for your support.