If you want just CRUD operations on the sqlite database file, then SQuirreL is a very option as it has an auto complete feature which drastically improve the speed and efficiency of typing the sql queries.
To use the SQLite database in SQuirreL first download the JDBC driver of the SQLite from here then drop the jar in the lib folder of the SQuirreL folder. Now open SQuirreL and choose Create a New Driver.
In the Example URL field put
jdbc:sqlite:$file_url
and in Class Name put
org.sqlite.JDBC
After that choose Create a New Alias and choose the driver that you just added and replace $file_url with the actual location of the sqlite file then click ok and you are done.