Karate supports any Java code so that way indirectly you should be able to do anything you want.
Please look at this JDBC example which will get you started: dogs.feature. You will need to write a little bit of Java code (one time only) so if you don’t have that skill, please ask someone to help.
# use jdbc to validate
* def config = { username: 'sa', password: '', url: 'jdbc:h2:mem:testdb', driverClassName: 'org.h2.Driver' }
* def DbUtils = Java.type('com.intuit.karate.demo.util.DbUtils')
* def db = new DbUtils(config)
# since the DbUtils returns a Java Map, it becomes normal JSON here !
# which means that you can use the full power of Karate's 'match' syntax
* def dogs = db.readRows('SELECT * FROM DOGS')
* match dogs contains { ID: '#(id)', NAME: 'Scooby' }