One SQL statement queries multiple databases
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'
Summary
The above is a SQL statement introduced by the editor to query multiple databases. I hope it will be helpful to you. If you have any questions, please leave me a message and the editor will reply to you in time. Thank you very much for your support to the website!
